geological survey open-file report 87-616 ...geological survey open-file report 87-616 strong-motion...

GEOLOGICAL SURVEY OPEN-FILE REPORT 87-616

STRONG-MOTION DATA FROM THE

OCTOBER 1, 1987 WHITTIER NARROWS EARTHQUAKE

By

E. Etheredge and R. Porcella

With contributions from

R. Maley, D. Johnson, M. Salsman, F. Ellis.

A. Acosta, J. Nielsen. J. Switzer, and R. Forshee

OCTOBER 1987

CONTENTS

Page

Introduction ------------------------- 1

The strong-motion network ------------------ 2

Strong-motion data and records ---------------- 3

References -------------------------- 7

Acknowledgements ----------------------- 7

ILLUSTRATIONS

Figure 1. Regional map showing USGS stations triggered during the Whittier Narrows earthquake ---------

2. Close-in map of USGS stations triggered during theWhittier Narrows earthquake ------------ 9

3. Strong-motion records including structure drawings from:

Garvey Reservoir ----------------- 10Whittier Narrows Dam --------------- 10Alhambra - 900 S. Fremont Ave. ---------- nWhittier - 7215 Bright Ave. ----------- 12L.A. - 4407 Jasper St. -------------- 13L.A. - Bulk Mail Center ------------- 13Vernon ---------------------- 13Norwalk - 12400 Imperial Hiway ---------- 14Norwalk - 12440 Imberial Hiway ---------- 15-18L.A. - 1111 Sunset Blvd. ------------- 19L.A. - 1100 Wilshire Blvd. ------------ 20-22L.A. - Griffith Park --------------- -23Morris Dam -------------------- 23Orange County Reservoir- ------------- 23Brea Dam --------------------- 24Carbon Canyon Dam ---------------- 25Long Beach - CSULB ---------------- 25Weymouth Filter Plant -------------- 26Palos Verdes Reservoir -------------- 26Diemer Filter Plant --------------- 27Lawndale - 15000 Aviation Blvd. --------- 27Live Oak Reservoir ---------------- 28Long Beach VA Hospital -------------- 29L.A. - Wadsworth VA Hospital ----------- 30-32L.A. Brentwood VA Hospital ------------ 32Sepulveda Canyon ----------------- 33

a

ILLUSTRATIONS

Page

Figure 3. Sepulveda Dam ------------------ 33(con't) San Antonio Dam ----------------- 34

Santa Ana - Orange County Bldg. --------- 35Palos Verdes Estates --------------- 35Sepulveda VA Hospital -------------- 35Prado Dam -------------------- 35Paradise Springs ----------------- 37Valyermo --------------------- 37Topanga 37Jensen Filter Plant --------------- 38Newport Beach ------------------ 39,40T -t H-1 arriflr ___ _._._._._._._._._._._._._. A1JjlLU XerOCK. if j_

Lone Pine Canyon ----------------- 41Malibu Canyon ------------------ 41Lytle Creek ------------------- 42Mathews Dam 42Santa Ana River Bridge -------------- 42-44Santa Susana ------------------- 45,46Leona Valley ------------------- 47Malibu School ------------------ 47Colton Interchange ---------------- 47San Bernardino - Govt. Center ---------- 48-50Loma Linda VA Hospital -------------- 50-52Loma Linda Medical Center ------------ 53Reche Canyon 53Palmdale 53

TABLE

Table 1. Main-shock data from USGS strong-motion stationsnear Los Angeles ------------------ -54

STRONG-MOTION DATA FROM THE OCTOBER 1, 1987 WHITTIER NARROWS EARTHQUAKE

INTRODUCTION

The magnitude (ML ) 6.1 Whittier Narrows earthquake of October 1, 1987,

triggered strong-motion instrumentation at 52 stations operated in the Los

Angeles area as part of the National Strong-Motion Instrumentation Network

(NSMIN). The purpose of this report is to provide information about the data

recorded during the earthquake, including a table of peak accelerations and

copies of the original records. The NSMIN is operated as a cooperative

program and incorporates instrumentation owned by the U.S. Geological Survey

(USGS) and numerous other organizations, including the Metropolitan Water

District of Southern California (MWD), Army Corps of Engineers (ACOE),

Veterans Administration (VA), Department of Energy (DOE), California

Department of Transportation (CDOT), and several private building owners.

Interested readers of this document should be aware that significant

collections of strong-motion data for this earthquake will be forthcoming from

other organizations, among them the California Division of Mines and Geology,

California Institute of Technology, Los Angeles County Flood Control District,

Los Angeles Department of Water and Power, Southern California Edison,

University of Southern California, U.S. Navy, and numerous municipalities

where high-rise buildings were instrumented to comply with seismograph

provisions of the building code.

A strong-motion station is defined as all the instrumentation operated at

a location; thus, a minimum of 3 data channels at a ground station or a

maximum of 48 data channels where two adjacent structures and associated

ground sites are instrumented, such as in Norwalk. Consequently, among the 52

stations there was a potential of 362 data channels, of which 358 successfully

recorded the earthquake. One failure occurred at Carbon Canyon dam, where an

unidentified triggering of the downstream instrument before the earthquake ran

off 25 feet of film that jammed the take-up magazine. In a second instance,

channel 18 at Norwalk failed A seconds after triggering. That sensor,

installed on the building frame above ceiling panels, has yet to be inspected;

but based upon the nature of the record at the point of failure, we suspect

that it was caused by impact or cable breakage.

THE STRONG-MOTION NETWORK

The strong-motion network in the Los Angeles area includes two general

categories; ground stations and structural recording stations. Ground

stations consist of triaxial accelerographs that are generally, though not

exclusively, installed in smaller buildings. At these locations the equipment

is located only at the foundation level. In other instances ground instru

ments are placed on concrete pads in small fiberglass transformer housings to

ostensibly act as free-field sites.

Structural recording stations contain moderate or extensive instrumenta

tion systems. The moderate instrumentation consists of two or more triaxial

accelerographs installed on or in a structure typified in this report by

buildings in Whittier, Norwalk, Los Angeles, and several ACOE dams in the

region.

Extensively instrumented structures are those where sensors are strategi

cally located throughout the structure, usually providing a minimum of 12 data

channels, and allowing a comprehensive analysis of the structural behavior

during an earthquake. Extensive recordings were obtained in buildings at

Norwalk, Los Angeles, Newport Beach, and Loma Linda, and at Live Oak reservoir

and the Santa Ana River bridge. Instrumentation of the extensively

instrumented structures are included with their respective records later in

this report.

STRONG-MOTION DATA AND RECORDS

Table 1 (see page 54) presents scaled peak accelerations for all record

ing components and is arranged in order of increasing epicentral distance,

calculated using an epicenter at 34.058°N lat. and 18.077°W long. (Caltech).

Column 1 provides a map index number to correlate the listings with Figure 1

(page 8), which shows stations out to 80 km, and Figure 2 (page 9), which

shows recording stations in the epicentral area. Stations beyond 80-km have

yet to be checked for triggerings. Figure 3, from page 10 through 53, shows

copies of the records and associated structure drawings, also arranged by

increasing epicentral distance.

Garvey Reservoir (#1), the closest station, is a ground site located on

rock 3 km from the epicenter; peak accelerations were 0.47 g_ horizontal and

0.38 g_ vertical. The record exhibits strong high-frequency motion during the

first 6 seconds of the earthquake.

The recording from the Whittier Narrows dam (#2) upstream site, 4-km

epicentral distance, shows the same high-frequency vertical characteristics;

peak accelerations are 0.31 j^ horizontal and 0.46 g_ vertical.

There were two close-in buildings with moderate instrumentation, that is,

accelerographs located at the basement, mid-level, and top of each

structure. The Alhambra building (#3) is a twelve-story steel frame structure

(8-km epicentral distance) where accelerations reached 0.30^ in the basement

and 0.47 g_ on the sixth floor. Accelerations at this station during the 1971

San Fernando earthquake were 0.13 £ in the basement and 0.18 j^ on the 12th

floor (Maley and Cloud, 1971). The Whittier building (#4) is a ten-story

reinforced concrete residence home (10-ktn epicentral distance) where the

highest accelerations recorded in the USGS network were 0.63 j[_ horizontal in

the basement and 0.61 g_ horizontal on the 5th floor. At both buildings the

duration of strong shaking was short, on the order of 2 to 4 seconds. At the

time of the earthquake the Alhambra building was being retrofitted with an

extensive recording system.

The USGS instrument at Vernon (#7) was located at the last remaining of

the three original stations that recorded the 1933 Long Beach earthquake. The

instrument, located in the basement of a six-story building, has now been

removed pending demolition of the structure. Peak recorded accelerations at

this site were 0.15j^ in 1933, 0.11 _g_ in the 1971 San Fernando earthquake, and

0.29 g_ horizontal and 0.17 j^ vertical during the Whittier Narrows earthquake

(Neumann, 1935; Maley and Cloud, 1971). Concerning the other two 1933

stations, Long Beach was discontinued when the building was demolished, and

the Subway Terminal station was removed when all operations in the tunnel were

abandoned in the 1960 f s.

An interesting set of records was obtained from a seven-story building at

12440 Imperial Highway, Norwalk, jointly instrumented by the USGS and Bechtel

Power Corporation. The structure is rectangular, 463 ft by 136 ft by 102 ft

tall, and has a steel ductile moment resisting frame resting on a foundation

of drilled-in-place caissons. The building has steel pan concrete floors and

an exterior facing of pre-cast concrete panels.

Twenty-seven accelerometers were installed throughout the structure near

the ceiling at the center and ends of floors 7, 4, 1, and basement, on the

basement concrete slab, and near the bottom of a center column caisson 30 ft

deep, (see page 18). Upper level sensors were attached to steel mounting

plates welded to the frame at appropriate locations near column beam

connections. Basement accelerometers are bolted to the floor at the east and

west ends and to the pier cap in the center of the building. The downhole

accelerometers were installed during construction by strapping the sensor

module to the bottom of a steel cage that was then lowered into the drill hole

and oriented before the caisson concrete was poured. To our knowledge, this

is the first time strong-motion sensors have been installed near the base of a

pile foundation.

Four ground-level (free-field) accelerographs have been installed around

the building in small fiberglass shelters. These instruments are located

nominally 90 to 270 ft from the building and form the ground response network

not only for that structure but also for an adjacent seven-story building

instrumented with three triaxial accelerographs. The entire complex of eight

accelerographs and 24 channels of remote transducer data are synchronized for

simultaneous time by either common starting and time signals or by WWVB radio

time (Maley and Etheredge, 1984).

Peak horizontal accelerations at the free-field sites ranged from 0.21 j_

to 0.29 g_ compared to 0.16 g_ at the bottom of the caisson and 0.20 g_ on the

pier cap at the top of the caisson. The wave forms show general similarities

at all five sites, although there are many smaller differences. The maximum

acceleration was 0.41 _g_ on the 7th floor.

The largest building in southern California instrumented under the USGS

program is the steel frame 33-story 1100 Wilshire building (#11) in Los

Angeles, 17 km west of the epicenter. The structure consists of a 23-story

triangular office tower with glass curtain walls above an 11-story square

parking structure clad in precast concrete panels. The design incorporates a

rigid perimeter frame in both the garage and tower, supplemented by a common

rigid frame in the core that connects the two configurations. The square base

is braced with coupled shear walls. The building rests on a ductile concrete

frame below grade with the columns setting on massive concrete footings (Civil

Engineering, 1986).

In a cooperative project with JCG Finance Corporation, the USGS installed

accelerometers on the 33rd floor, on the 12th and 13th floor at the juncture

of the square and triangular frames, at the street level, and in the basement

(see page 22). Maximum horizontal ground accelerations were 0.18_g_: those in

the structure were measured in the 0.24 g_ to 0.26 g_ range on the 12th and 13

floors.

The 1010 ft MWD Santa Ana River Bridge (#43), located near Riverside at

an epicentral distance of 59 km, was constructed with three 180 foot steel

trusses on the north end and concrete piers on 50 foot centers at the south

end. The bridge carries a 116 in diameter steel pipe used by MWD to carry

import water from the Colorado River and northern California to almost half of

southern California's 13 million people (Snyder and others, 1986). The

structure was recently retrofitted with elastomeric bearings for base

isolation. In conjunction with this project, accelerometers were placed on

the truss section of the bridge below and above one bearing, at mid-span, on

the abutment, and on nearby rock (see page 44). Although accelerations were

relatively low, 0.05 j[ at the abutment and rock site and in the 0.13 j[ to 0.15

g_ range above and below the bearing, the records are of particular signifi

cance since they are the first to be obtained in the United States from a

bridge fitted with a base isolation system.

Additional reports will be issued on this earthquake and the October 4

magnitude 5.5 aftershock, and will include the processing and analysis of

significant records.

ACKNOWLEDGEMENTS

The National Strong-Motion Instrumentation Network includes cooperative

programs with the Metropolitan Water District of Southern California, Army

Corps of Engineers, Veterans Administration, Department of Energy, and several

private building owners.

The USGS appreciates the assistance of numerous organizations that have

allowed use of their facilities for the operation of strong-motion

instrumentation.

REFERENCES

Civil Engineering, 1986, Complex tower meets earthquake code: Am. Soc.

Civil Eng., March 1986, p. 64-66.

Maley, R. , and Cloud, W. , 1971, Strong-motion accelerograph records: in,

Hudson, D. E., editor, Strong-motion instrumental data on the San Fernando

earthquake of Feb. 9, 1971, Caltech and Coast and Geodetic Survey Report,

p. 1-53.

Maley, R. , and Etheredge, E., 1984, The development of ground and structural

response strong-motion instrumentation in the United States: Proceedings -

of the Eighth World Conference on Earthquake Engineering, v. II, San

Francisco, July 21-28, 1984, p. 31-38.

Neumann, F., 1935, Strong-motion seismograph results: United States

Earthquakes, 1928-1935, Coast & Geodetic Survey, p. 39-79.

Snyder, G., Lindvall, C., and Lyons, R., 1986, Earthquakes will not damage

this bridge: in, Civil Engineering, Am. Soc. Civil. Eng., September 1986,

p. 54-56.

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Figure 3. Strong-motion records including structure drawings.

10

ALHAMBRA, 900 SOUTH FREMONT

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WHITTIER, 7215 BRIGHT AVE

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ONE CM/SEC

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0.41

0.61

0.34

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ACCELEROMETER DIRECTIONS

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18

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STRUCTURE

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Triangular tower 21 stories

Steel frame

Coupled shear wall

P o t t e n i o n ed slabs


VERTICAL

*- HORIZONTAL

22

LOS ANGELES, GRIFFITH PARK OBSERVATORY

360 0.13

MORRIS DAM, ABUTMENT

ORANGE COUNTY RESERVOIR, ABUTMENT

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ONE CM/SEC

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ONE CM/SEC

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Crest

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ONE CM/SEC

LONG BEACH, CSULB

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346

25

WEYMOUTH FILTER PLANT Water Tank, Top

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Bldg, Ground Level

017

ONE CM/SEC

PALOS VERDES RESERVOIR, ABUTMENT

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0.05

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0 -0 3

1 6 3 0 . 0 4

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27

LIVE OAK RESERVOIRStructure Array

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0.05

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28

11th FloorLONG BEACH VA HOSPITAL

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7

8 12*,

Do

wn

Bate

man

t.

No

rth

C

«n

t«r

Bate

man

t.

N\>

rth

C

«n

t«r

0.0

7

0.0

4

ON

E

CM

/SE

C

VITIEAN8 ADMINI6TBATION HOSPITAL

LOS ANGELES ( WADSWORTH ) , CALIFORNIA


X1'

^frA

-^*6

V I

6tb FLOOR

BASEMENT

WEST ELEVATION

to

n n

C

C

f fLP 1^ 5A1 2

n 3 mt /* o

3

3

LI U ROOF PLAN

C

c

n n

7 93

PARTIAL BASEMENT PLAN

N

STRUCTURE

Rectangular base

cross-shaped towers ( 5 stories )

Core: steel frame

Wings: steel braced towers

Foundation: R C piles



^- AS SHOWN

31

LOS ANGELES, WADSWORTH VA HOSPITAL

North Ground Site

325 .___ ^ _.. ______ _ _____________ . 0.07

Up _ --n - - - 0.03

-235_______________________._^.^. *-.,-__________ _______________ _ 0-08

ONE CM/SEC

South Ground Site

325 __-^ ^__*l---rjT_nr l i- -r.ur^ LJJ-UU-, -.-_.-_.- _-- _ -.. _ -O- 0 ^7

Up ..............._.._.._ ..__.. 0.04

235 . .. _ _ . _^_.........._. /L _^_. .^. -^_ __ __. _ . _ _ _ 0.09

ONE CM/SEC

LOS ANGELES, BRENTWOOD VA HOSPITAL

285 _____ _ _ _--_-..-_- _-_- _ 0.. 04

Up -.---_-.- _-. 0 ' 03

195 ... 0.05

ONE CM/SEC

32

SEPULVEDA CANYON

ONE CM/SEC

SEPULVEDA DAM

^i^

ONE CM/SEC

Downstream

ONE CM/SEC

33

SAN ANTONIO DAMCrest

Up . -n^f^MnnVLArvruM^fLTLTTi^^ -- - -- - -- ,0-06

5 P i»i.»»Mn ^W^.^. fitjV^f^J^SM]^^ -

ONE SM/SEC

Downstream

Up _______-_->.-- --.-.-.-.--.v..-. -... ____ _-- __________________________________0.04

360 . ... ... . _. . . 0.05

ONE CM/SEC

Right Abutment

090 0.04

Up

360 0.04

ONE CM/SEC

34

SANTA ANA, ORANGE COUNTY ENGINEERING BLDG

ONE CM/SEC

PALOS VERDES ESTATES, BASEMENT

ONE CM/SEC

SEPULVEDA VA HOSPITAL

360 0. 1 8

0. 1 0

270 0.2 2

ONE CM/SEC

35

PRADO DAM Crest

090 _________________ ^ ^_____ ^_ -______________°-09

ONE CM/SEC

Left Abutment

ONE CM/SEC

UP ...,. _ ,_ .... _._- _ ^.,> __^ _ 0.06

»nn O757"

090 _ .. . . °- 04

UP_________________________ _ , _ ______________________________ 0.03

360 _________________________.^. «...>__ ____. ___ _^__^__ _ O' 07.

ONE CM/SEC

Downstream

090 ' °' 14

UP,.^ .^^..^^_______.-.-.-.-.-^. L^^fJ-^v.v-.y.-----J.'^--% ----.%-^^-----v------"--._______0 ' 06.

~o ..... ..."~ ~~" ^^

36

PARADISE SPRINGS CAMP

120 0.02

UP0.02

ONE CM/SEC

VALYERMO FOREST STATION

300 . °' 04

21Q _. 0,05

ONE CM/SEC

TOPANGA FIRE STATION

270

UP 0.02

180 __ O.O4

ONE CM/SEC

37

Admin. BldgJENSEN FILTER PLANT

Generator Room

^^^

ONE CM/SEC

Str

uctu

re

Arr

ay

NE

WP

OR

T

BE

AC

H,

84

0

NE

WP

OR

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CE

NT

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).

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nte

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ter

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ter

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t),

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(P

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"~

ii

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~^

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ter

rr -

inO

NE

C

M/S

EC

NEWPORT BEACH

800 NEWPORT CENTER DRIVE


PENTHOUSE

PLAZA __ _

m ro

TOWER 2

eI 35'

TWIN TOWERS

COMMON BASEMENT

SOUTH ELEVATION

PENTHOUSE

TOWER I

PLAZA

BASEMENT

7th CEILING

N

10

STRUCTURE

Reinforced concrete

ACCELEROMETERS

INTO PLANE OF .PLAN/ELEVATION

«^- AS SHOWN

40

LITTLEROCK POST OFFICE

Up _ _____ __ _____ 0.07

210 O 0 7

ONE CM/SEC

LONE PINE CANYON

1 20____________________________.__ _ ____ ___________________________0.05 ^ ^ ^ ^^ ^ MMMi^BmMMMMM^MMH^^^^a^^^^^M^A^^MAMAAM^BM^^paMMIHMV^MnMMMMnMM^BBIMMMMMM^M^MM^BMMMMMa^MM*

Up ^______________0.03

030__________________________AW>^^WW^^W»^-*-^_____.****______________________O.OS

ONE CM/SEC

MALIBU CANYON, MONTE NIDO FIRE STATION

090 Q.Q3

Up 0.02

360 0.04

ONE CM/SEC

4 1

LYTLE CREEK RESIDENCE

3 1 5 0.04

Up 0.02

225 .. ,___ _ 0.05

ONE CM/SEC

MATHEWS DAM, DIKE TOE

° Z ... + s^v»«v>>^^»«fvv»v*'<~^ww>^~v - , ^

UP_____________^_____________-n.,, J ,..n.J^,.,_Vja.AT ,.,v ,J_____ __________________________0.05

M.....X...... ... ..,.^.^».... ...V. . ^!- ,-. .^^l.l :.f-VJ\^^^%f^ // lff t»lfff^^ S~wv~. *~- I * . .. ,,

ONE CM/SEC

SANTA ANA RIVER BRIDGE

North Abutment Recorder Bldg

175 0.05

Up 0.04

085 0.05

ONE CM/SEC

42

SA

NT

A

AN

A

RIV

ER

B

RID

GE

Str

uctu

re A

rray

to

35

51 *»

.DO

WN

n 086

. 3

65

.DO

WN

w

L

-

-

08

5

35

6

7 -U

_B

n

0,8

,6

NO

RT

H

AB

UT

ME

NT

0

.06

NO

RT

H

AB

UT

ME

NT

0

.03

NO

RT

H

AB

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ME

NT

0.0

4

_^_,.__

A ._

.._

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... ...

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J»A

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. ._

..

....

0

.18

~^,»

.^.»

vMw

vv*v

VW

V'**

*V*«

^WV

vv^^

" ""

" ""

"

' ifi"

_ _

_ _

_ . .^

L

r - -^r^.^

-

MJD

5

PA

N __._

____._

_._

___._

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0,1

1....

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r V

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t-Lnaru

vuru

^tr

ru

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iuvT

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W

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p

. 01

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W

BE

AR

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-*

^^r,

*AA

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fl*^

^

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OV

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0.1

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A

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7

,n

00

6r

AB

OV

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BE

AR

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ON

E

CM

/SE

C

RO

CK

S

ITE

SM

A-1

AB

UT

ME

NT

1 2

3

AB

OV

E

BE

AR

ING

10

11

12

BE

LO

W

BE

AR

ING

78

9

SA

NT

A

AN

A

RIV

ER

B

RID

GE

ME

TR

OP

OL

ITA

N

WA

TE

R

DIS

TR

ICT

O

F

SO

UT

HE

RN

C

AL

IFO

RN

IA

ST

RO

NG

-MO

TIO

N

INS

TR

UM

EN

TA

TIO

N

ST

RU

CT

UR

E

Th

ree

18

0'

lon

g

ste

el

tru

sses

(in

stru

men

ted

se

cti

on

)

TR

IAX

IAL

S

EN

SO

RS

EL

AS

TO

ME

RIC

B

EA

RIN

GS

Ground StationSANTA SUSANA

090 0.03

Up 0.01

60 0.03

ONE CM/SEC

Bldg 462, 1st Floor

QQO 0.02

Up 0.01

360 0.02

ONE CM/SEC

Bldg 462, 6th Floor

0900.08

Up .. 0.04

aeo 0.07

ONE CM/SEC

45

SANTA SUSANA Bldg 026, Ground

825 - -U-urujVLTX-..- ------- _.-- °'° 4

Up _ . °' 02

TTC . ^ - O.D3

Bldg 356, 3rd Floor

Bldg 463, Roof

LEONA VALLEY FIRE STATION

120______________________ '/._ ^-.-um^yrLn^v-^-^-urvru-. _ . -_-, ._ .___________________0.05

Up _______0.04

030_____________________________ ^ ____ . . ._ ^___________^_________0.03

MALIBU, KILPATRICK SCHOOL

COLTON INTERCHANGE, VAULT

47

SA

N

BE

RN

AR

DIN

O

CO

UN

TY

G

OV

ER

NM

EN

T

CE

NT

ER

Str

uctu

re

Arr

ay

»«

n

2nd

Level.

NW

0

90

2nd L

eve

l,

NE

a A

n

2nd

Level.

NE

09

0

2n

d Level.

8W

09

0

^

4th

Level

- 8W

^3

60

4th

Level,

NW

Q90

6th

Level,

(Roof)

N

E7

^ --

u--

v

-

-^

-

38

0

8th

Level,

(Roof)

N

W

09

0

_

eth

Level,JtR

oof)

8W

(._)

Se

nso

r N

ot

Insta

lled

09

0

4th

Level,

NE

*

n 3

60

_ _

4

th Level.

NE

_

- .

0.0

4

9-, 9

3

0.0

4

0.0

2

0.0

7

0.0

2

0.0

6.

0.1

2

0.0

5

(--)

0.0

2

0.0

7

ON

E

CM

/8E

C

SAN BERNARDINO

COUNTY GOVERNMENT CENTER


12

VARIES

WEST ELEVATION

256'

SOUTH ELEVATION

264'

4

4th FLOOR 5th FLOOR CEILING

SMA-1

STRUCTURE

Braced steel frame

ACCELEROMETER DIRECTIO!

INTO PLANE OF

PLAN/ELEVATION

^- AS SHOWN

4GROUND FLOOR GROUND FLOOR CEILING

49

SAN BERNARDINO COUNTY GOVT CENTER

Ground Floor, SW

090 0.02

0.02

360 0.03

ONE CM/SEC

North Ground SiteLOMA LINDA VA HOSPITAL

360 0.04

Up 0.03

270 0.04

ONE CM/SEC

South Ground Site

360 0.04

Up 0.02

270 0.02

ONE CM/SEC

50

LO

MA

L

IND

A

VA

H

OS

PIT

AL

Ol

Buildin

g

1

Str

uctu

re A

rray

! D

otf

n - . .

.. _

,.

i e

o

n 270

. 270

.. 270

c 1

i0o

**

7 870

c 18

°u

270

i/

Gro

un

d

Flo

or,

C

ente

r

Gro

un

d

Flo

or.

C

an

ter

Gro

un

d

Flo

or,

C

en

ter

4th

F

loor,

C

ente

r

Gro

un

d

Flo

or,

N

ort

h

4th

F

loor,

C

en

ter

4th

F

loor,

N

ort

h,

_ v ^A

AA

^>

A^---^^--

^-^

-~

^

Gro

und

Flo

or,

S

outh

4th

F

loor,

S

outh

0.0

1

0.0

3

0.0

2

0.0

7

0.0

3

0.0

4

0.0

8

0.0

1

0.0

7

ON

E

CM

/SE

C

VETERANS ADMINISTRATION HOSPITAL

LOMA LINDA , CALIFORNIA


T

r- »» v s

4th FLOOR

Itt FLOOR

WEST ELEVATION

441'

ROOF PLAN

r

1st FLOOR PLAN

STRUCTURE

Rect angular

Moment resisting steel frame

Concrete shear walls in

both directions



AS SHOWN

52

LOMA LINDA MEDICAL CENTER, BASEMENT

360_______________________________________________________________________0.02

Up__________________________________________________________________________0.01

270 0.02

ONE CM/SEC

RECHE CANYON

330 _____________________________________________________________Q.Q2

Up O.oT

240 0.02

ONE CM/SEC

PALMDALE FIRE STATION

120_____________________________________ ^^^^ ^___________;________0.03

Up _____________ ____________________ _________ 0.04

030 0.04

ONE CM/SEC

53

Table 1. MAIN-SHOCK DATA FROM USGS STRONG-MOTION STATIONS NEAR LOS ANGELES

[Station owners are Army Corps of Engineers (ACOE); Bechtel Power Corporation (BECH); Calif. Dept. of Transportation (CDOT); U.S. Dept. of Energy (DOE); JCG Finance Corp. of America (JCG); Los Angeles Metro. Water District (MWD); U.S Geological Survey (USGS); and the Veterans Administration (VA). Epicentral distance is measured from station to epicenter at lat. 34.058 N.j long. 118.077 W. Direction of acceleration is for upward trace deflection on accelerogram; vertical-component directions are listed as 'up' or 'down 1 .]

MapIndexNumber

1

2

-

Station IdentificationUSGS NameNumber (Owner)

709 Garvey ReservoirAbutment Bldg.(MWD)

289 Whittier Narrows Dam(ACOE)

Crest

Upstream

Epicentral AccelerationCoordinates(Lat. °N,Long. °W)

34.05118.11

34.03118.05

Distance Direction(km) (degrees)

3 060Up330

4

033Up303

152Up062

Maximum(g)

0.33.38.47

.31

.19

.32

.31

.46

.24

482 Alhambra900 S. Fremont (USGS)

Basement

34.09118.15

090 Up360

,30 ,19 ,26

6th Floor 090Up360

,47,1837

12th Floor 090Up360

28,29,23

804 Whittier7215 Bright Ave (USGS)

Basement

5th Floor

10th Floor

33.977118.036

10

180Up090

180Up090

180Up090

,4026,63

,61,3460

,41 ,54 ,54

54

Table 1. MAIN-SHOCK DATA FROM USGS STRONG-MOTION STATIONS NEAR LOS ANGELES (continued)

Station Identification EpicentralMap USGS Name Coordinates Distance Index Number (Owner) (Lat. °N, (km) Number Long. °W)

5 5244 Los Angeles 34.081 114407 Jasper Street 118.188(USGS)

6 5129 Los Angeles 33.99 11Bulk Mail Center 118.16(USGS)

7 288 Vernon 34.00 134814 Loraa Vista Ave. 118.20(USGS)

8 634 Norwalk 33.92 1512400 Imperial Hiway 118.07(USGS/BECH)

Basement

4th Floor

Roof

'

North Ground Site removed for repair.

South Ground Site

9 5239 Norwalk 33.92 1512440 Imperial Hiway 118.07(USGS/BECH)

Basement

North Ground Site

South Ground Site

AccelerationDirection (degrees)

130Up040

010Up280

007Up277

090Up360

090Up360

090Up360

090Up360

090Up360

090Up360

090Up360

Maximum (g)

.33*

.13*

.23*

.34

.52

.46

.29

.17

.22

.12

.07

.21

.17

.12

.33

.21

.18

.40

.10

.09

.29

.11

.10

.21

.13

.13

.24

.09

.10

.21

*Partial record, film fogged for approx. the first 3 sec. after triggering.

55


Station IdentificationMap USGS Name Index Number (Owner) Number

Coordinates (Lat. °N, Long. °W)

EpicentralDistance

(km)

Acceleration Direction Maximum (degrees) (g)

5239 Norwalk, 12440 Imperial Hiway (continued)

Structure Array 1:Ch. 1- 7th Floor, CenterCh. 2- 5th Floor, CenterCh. 3- 2nd Floor, CenterCh. 4- 1st Floor, CenterCh. 5- Basement, EastCh. 6- 5th Floor, West-CenterCh. 7- Basement, CenterCh. 8- Basement, CenterCh. 9- Basement, CenterCh. 10- 30 ft. Downhole, Bldg. CenterCh. 11- 30 ft. Downhole, Bldg. CenterCh. 12- 30 ft. Downhole, Bldg. Center

-10 872

StructureCh.Ch.Ch.Ch.Ch.Ch.Ch.Ch.Ch.Ch.Ch.Ch.

13-14-15-16-17-18-19-20-21-22-23-24-

Array 2:7th5th2nd1st7th5th2nd1st7th5th2nd1st

Floor,Floor,Floor,Floor,Floor,Floor,Floor,Floor,Floor,Floor,Floor,Floor,

EastEastEastEastCenterCenterCenterCenterWestWestWestWest

Los Angeles 1111 Sunset Blvd (MWD)

Basement

4th Floor

Roof

090090090090360360090Up360090Up360

360360360360360360360360360360360360

34.07118.25

16

348Up258

348Up258

348Up258

.18

.15

.12

.13

.19

.23

.05

.11

.20

.05

.10

.16

.31

.14

.17

.18

.41

.26*

.30

.23

.27

.12

.19

.22

.16

.07

.11

.19

.09

.11

.18

.22

.15

11 5233 Los Angeles1100 Wilshire (JCG/USGS)

Basement 3, NE

34.052118.263

17

298Up 208

.18

.07

.12

*Ch. 18 failed after 2.5 sec.

Table \.--MAIN-SHOCK DATA FROM USGS STRONG-MOTION STATIONS NEAR LOS ANGELES (continued)

Map Index Number

11

'

12

13

14

15

Station Identification EpicentralUSGS Name Coordinates Distance Number (Owner) (Lat. °N, (km)

Long. °W)

5233 L.A., 1100 Wilshire (continued)

Basement 3, SE

Basement 4, NW

Structure Array:Ch. 1- 12th Floor, NorthCh. 2- 12th Floor, NorthCh. 3- 12th Floor, SouthCh. 4- 13th Floor, NorthCh. 5- 13th Floor, NorthCh. 6- 13th Floor, SouthCh. 7- 32nd Floor, NorthCh. 8- 32nd Floor, NorthCh. 9- 32nd Floor, SouthCh. 10- Ground Floor, NorthCh. 11- Ground Floor, NorthCh. 12- Ground Floor, South

141 Los Angeles 34.12 22Griffith Park Observatory 118.30(USGS)

756 Morris Dam 34.17 22Abutment 117.88(MWD)

697 Orange County Reservoir 33.935 23Abutment 117.883(MWD)

951 Brea Dam 33.889 23(ACOE) 117.926

Crest

Left Abutment

Downstream


298Up208

298Up208

298208208298208208298208208298208208

360Up270

246Up156

096Up006

130Up040

130Up

. 040

130Up040

Maximum

.18

.07

.11

.17

.08

.11

.13

.24

.10

.14

.26

.12

.17

.19

.10

.17

.21

.15

.13

.06

.15

.04

.04- .05

.23

.10

.21

.31

.14

.23

.16

.09

.10

.32

.09

.18

57


Map Index Number

16

17

-

18

-

19

20

Station IdentificationUSGS Name Number (Owner)

108 Carbon Canyon Dam (ACOE)

Crest

Left Abutment

5164 Weymouth Filter Plant (MWD)

Bldg., Ground Level

Water Tank, Top

698 Diemer Filter Plant (MWD)

Admin. Bldg. Basement

Reservoir Roof

132 Long Beach, CSULB Humanities Bldg. Basement (USGS)

656 Live Oak Reservoir (MWD)

Abutment

Epicentral AccelerationCoordinates Distance Direction (Lat. °N, (km) (degrees) Long. °W)

33.92 27 117.84

130 Up 040

130 Up 040

34.114 28 117.778

017 Up 287

017 Up 287

33.91 29 117.82

281 Up 191

281 Up 191

33.78 31 076 118.11 Up

346

34.134 31 117.753

180 Up 090

Maximum 00

.17

.13

.20

.22

.07

.16

.10

.05

.06

.15

.11

.13

.09

.04

.06

.11 . .17

.11

.09

.05

.09

.04

.02

.03

Table I .--MAIN-SHOCK DATA FROM USGS STRONG-MOTION STATIONS NEAP LOS ANGELES (continued)

Station IdentificationMap USGS Index Number Number

Name (Owner)


EpicentralDistance

(km)

Acceleration Direction Maximum (degrees) (g)

20 656 Live Oak Reservoir (continued)

Structure Array:Ch. 1- Center Crest Ch. 2- Center Crest Ch. 3- Center Crest Ch. 4- Left Crest Ch. 5- Left Crest Ch. 6- Left Slope Ch. 7- Center Slope Ch. 8- Center Slope Ch. 9- Center Slope Ch. 10- Center Toe Ch. 11- Center Toe Ch. 12- Center Toe

155Up245155245245155Up245155Up245

,07 ,04 ,07 ,09 ,08 ,04 ,09 ,04 ,06 ,05 ,02 ,03

21 - 5106 Long Beach 33.78 VA Hospital 118.12 (VA)

Basement

6th Floor

llth Floor

22 5243 Lawndale 33.895 15000 Aviation Blvd. 118.377 (USGS)

23 5082 Los Angeles 34.050 Wadsworth VA Hospital 118.452 (VA/USGS)

Bldg. 500 Structure Array:

31

33

35

360Up270

360Up270

360Up270

360Up270

.08

.05

.10

.17

.08

.11

.26

.11

.16

.06 .04

.06

Ch, Ch, Ch, Ch, Ch, Ch, Ch, Ch, Ch. 9- Basement, North Center

1- 6th Floor, North End2- 6th Floor, North Center3- 6th Floor4- 6th Floor,5- 6th Floor6- 6th Floor,

Center Center South End South End

7- Basement, North Center8- Basement, North Center

North Ground Site

235 235 235 055 055 325 325 235 Down

325Up235

,20,15,15,18,2513,0707,04

,07 ,0308


Map Index Number

23

24

25

26

27

28

29

30


5082 L.A., Wadsworth VA Hospital

South Ground Site

638 Los Angeles, Brentwood VA Hospital, Ground level (VA)

757 Sepulveda Canyon Spillway Roof (MWD)

287 San Antonio Dam (ACOE)

Crest

Right Abutment

Downstream

949 Sepulveda Dam (ACOE)

Crest

Downstream

710 Palos Verdes ReservoirAbutment (MWD)

281 Santa Ana, Orange County Engineering Bldg., Basement (USGS)

411 Palos Verdes EstatesBasement (USGS)

EpicentralCoordinates Distance (Lat. °N, (km) Long. °W)

(continued)

34.058 35 118.457

34.05 37 118.48

34.166 38 117.680

34.17 38 118.47

33.774 39118.321

33.75 39 117.87

33.801 40118.387


325Up 235

285 Up 195

156 Up 066

090Up 360

090 Up 360

090Up 360

054Up 324

054Up 324

253Up 163

360 Up 270

335Up 245

Maximum (g)

.07

.04

.09

.04

.03

.05

.03

.02

.08

.10

.06

.14

.04

.05

.04

.07

.04

.05

.09

.09

.14

.12

.07

.15

.04

.03

.04

.09

.03

.05

.03

.02

.03

Table I. MAIN-SHOCK DATA FROM USGS STRONG-MOTION STATIONS NEAR LOS ANGELES (continued)

Map Index Number

31

32

-

33

34

35

36

37


637 Sepulveda VA HospitalGround level(VA)

969 Prado Dam(ACOE)

Crest

Left Abutment

Downstream

5032 Paradise Springs CampGround Level(USGS)

5031 Valyermo Forest StationGround Level(USGS)

655 Jensen Filter Plant(MWD)

Administration Bldg.

Generator Room

Reservoir Roof

5081 Topanga Fire StationGround Level(USGS)

5030 Littlerock Post OfficeGround Level(USGS)

EpicentralCoordinates Distance (Lat. °N, (km) Long. °W)

34.249 43118.475

33.89 44117.64

34.40 46117.80

34.44 47117.85

34.309118.499

34.084 48118.600

34.521 52117.991


360Up270

090Up360

090Up360

090Up360

120Up030

300Up210

022Up292

022Up292

022Up292

270Up180

300Up210

Maximum <£>

.18

.10

.22

.09

.06

.09

.04

.03

.07

.14

.06

.12

.02

.02

.02

.04

.04

.05

.06- .05

.11

.09

.06

.16

.22

.10

.31

.03

.02

.04

.08

.07

.07

Table 1. MAIN-SHOCK DATA FROM USGS STRONG-MOTION STATIONS NEAP LOS ANGELES (continued)

Station IdentificationMap Index Number

38

USGS Number

5246

Name (Owner)

Newport Beach 840 Newport Center Drive (USGS)


33.618 117.878

Epicentral Distance

(km)

52

AccelerationDirection Maximum (degrees) (g_)

39

40

41

42

43

5034

5080

262

5035

5235

Structure Array:Ch.Ch.Ch.Ch.Ch.Ch.Ch.Ch.Ch.Ch.Ch.Ch.

1- Tower 2,2- Tower 2,3- Tower 2,4- Tower 2,5- Tower 2,6- Tower 2,7- Tower 2,8- Tower 2,9- Tower 2,10- Tower 111- Tower 112- Tower 1

LevelLevelLevelLevelLevelLevelLevelLevelLevel

, Level, Level, Level

Lone Pine Canyon Ground Level (USGS)

Malibu CanyonMonte Nido Fire Station(USGS)

Palmdale Fire StationGround Level(USGS)

Santa Ana River Bridge (MWD/USGS)

South Abutment Recorder Building

Structure Array:Ch. 1- North AbutmentCh. 2- North AbutmentCh. 3- North AbutmentCh. 4- Mid SpanCh. 5- Mid SpanCh. 6- Mid SpanCh. 7- Below BearingCh. 8- Below BearingCh. 9- Below BearingCh. 10- Above BearingCh. 11- Above BearingCh. 12- Above Bearing

1 (Garage), Center 1 (Garage), Center1 (Garage), Center2 (Plaza), West End 2 (Plaza), Center 2 (Plaza), Center9 (Roof), South End10 (Penthouse), Center 10 (Penthouse), Center9 (Roof), East End10 (Penthouse), Center 10 (Penthouse), Center

34.32 55117.57

34.08 56118.69

34.58 , 58118.11

34.26 58117.50

33.968 59117.447

360Up090360360090090360090360270360

120Up030

090Up360

120Up030

315Up225

.06

.02

.03

.08

.10

.06

.04

.04

.08

.04

.04

.06

.05

.03

.05

.03

.02

.04

.03

.04

.04

.04' .02

.05

175Down085

355Down085355Down085355Down085355Down085

.05

.04

.05

.05

.03

.04

.18

.11

.12

.13

.01

.06

.15

.07

.08


Station IdentificationMap USGS Name Index Number (Owner) Number

44 5108 Santa Susana(DOE)

Ground Station

Building 026, Ground

Building 356, 3rd Floor

Building 462:1st Floor

6th Floor

Building 463, Roof

45 5036 Sycamore Forest StationGround Level(USGS)

46 707 Ma thews DamDike Toe(MWD)

47 5029 Leona Valley Fire StationGround Level(USGS)

48 5079 MalibuKilpatrick School(USGS)

49 754 Colton Interchange, I-10/I-215Pier Base Vault(CDOT)

Epicentral AccelerationCoordinates (Lat. °N, Long. °W)

34.23118.71

,

34.193117.426

33.852117.451

34.62118.29

34.093118.836

34.06117.30

Distance Direction (km) (degrees)

61

090Up360

325Up235

325Up235

090Up360

090Up360

090Up360

62 315Up225

62 252Up162

65 120Up030

70 270Up180

72 082Up352

Maximum

.03

.01

.03

.04

.02

.03

.07

.03

.07

.02

.01

.02

.08

.04

.07

.07

.09

.07

Didnot

trigger

- .05.05.09

.05

.04

.03

.02

.01

.02

.04

.01

.02

Table \.--MAIN-SHOCK DATA FROM USGS STRONG-MOTION STATIONS NEAR LOS ANGELES (continued)

Map Index Number

50

"

51

52

53

Station Identification EpicentralUSGS Name Coordinates Distance Number (Owner) (Lat. °N, (km)

Long. °W)

5245 San Bernardino 34.106 73County Government Center 117.287(USGS)

Ground Floor, SW

Structure Array:Ch. 1- 2nd Floor Level, NWCh. 2- 2nd Floor Level, NECh. 3- 2nd Floor Level, NECh. 4- 2nd Floor Level, SWCh. 5- 4th Floor Level, SWCh. 6- 4th Floor Level, NWCh. 7- 6th Floor Level, (Roof) NECh. 8- 6th Floor Level, (Roof) NWCh. 9- 6th Floor Level, (Roof) SWCh. 10- Sensor Not InstalledCh. 11- 4th Floor Level, NECh. 12- 4th Floor Level, NE

129 Loma Linda Medical Center 34.05 75Basement 117.26(USGS)

5229 Loma Linda 34.049 ' 76VA Hospital 117.250(VA/USGS)

Building 1 Structure Array:Ch. 1- Ground Floor, CenterCh. 2- Ground Floor, CenterCh. 3- Ground Floor, CenterCh. 4- 4th Floor, CenterCh. 5- Ground Floor, NorthCh. 6- 4th Floor, CenterCh. 7- 4th Floor, NorthCh. 8- Ground Floor, SouthCh. 9- 4th Floor, South

North Ground Site

South Ground Site

5037 Reche Canyon 34.01 79Olive Dell Ranch 117.22(USGS)


090Up360

360090360090090360090360090(--)090360

360Up270

Down180270270270180270180270

360Up270

360Up270

330Up240

Maximum <JL

.02

.02

.03

.04

.03

.04

.02

.07

.02

.05

.12

.05(-).02.07

.02

.01

.02

.01

.03

.02

.07

.03

.04

.08

.01

.07

.04

.03

.04

.04

.02

.02

.02

.02

.02

64

geological survey open-file report 87-616 ...geological survey open-file report 87-616 strong-motion...

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