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THK Base Isolation Catalog - Technical Book

CATALOG No.A-02-01E

2

Base Isolation of BuildingsTHK’s base isolation systems are capable of achieving base isolation even with lightweight buildings andtowering buildings, whose base isolation was difficult with the conventional systems. Buildings themselves can be designed normally. Our base isolation products are flexible earthquake-proof systems.

Applicable to various buildings

THK’s base isolation systems are capable of operatingeven with lightweight buildings. They can base isolate notonly heavy buildings that can be base isolated even withthe conventional systems, but also skyscrapers, woodenhouses and light-gauge steel structures.

Free cycle setting

Linear motion re-circulating guide CLB has a small friction coefficient (0.0012to 0.009) and its piece-to-piece variation is minimum (0.002 or less).Therefore, the bearing is capable of extending the service life of buildings(cycle of 5 seconds or longer), which were difficult to achieve with theconventional system, through setting the recovery/attenuation mechanisms.

Base-isolated frame

Separates the building from the ground,and serves as the base of conventionalbuildings. It is made from steel frames,concrete and laminate wood.

Lightweight buildings Mid- to low-rise buildingsCapable of base isolating wooden buildings, light-gaugesteel structures and reinforced concrete structures. Thosebuildings can be designed the same as conventionalbuildings.

Steel-framed and reinforced concrete mid- to low-risebuildings, such as complex housings and office buildings,can be base isolated.

Because our base isolationsystems support buildings, we combined THK product technologiesthat support these systems.THK’s base isolation systems use our core products includingLM Guides. Those base isolation systems, which have beendeveloped as applied versions of our products that employ ourreliability, experience, creativity and technological strengths,reflect THK’s unwavering confidence.

Linear re-circulating guide CLBBearing component that combines THK LM Guides crosswise

Linear guide CLB is a base isolation system that achieves a heavysustained load and an extremely low frictional force since the ballsin the LM block rotate on the raceways cut into the LM rail whilecirculating through the block. In addition, since the LM blockretains the LM rail via the balls, the bearing can also receive apulling load.

LMblock

Ball

LMrail

End plate

End seal

Also corresponds to tower buildings

Linear motion re-circulating guide CLB has a structurethat also withstands a pulling load. Even if the bearingsupporting a high-aspect-ratio building receives a pullingload, the building will not float.

3

High-rise buildings and skyscrapers

Viscous damping system RDTA damping system that uses THK Ball Screw

It absorbs earthquake energy that transmits to the building with ashearing resistance of a viscous body. Viscous damping systemRDT has a structure where the linear motion of the ball screw thatis converted with the ball screw nut into rotary motion, and ashearing force is applied to the viscous body filled between theinner tube connected with the nut and the fixed outer tube.

Motion of theshaft

Ball screw shaft

Ball screw nut

Outertube

Internal rotation

Recovery system (rubber material)Non-THK product

When an earthquake occurs, base isolated houses freely move inall horizontal directions from their foundations. Therefore, theyneed to be returned to their original neutral positions after theearthquake stops. For that purpose, those houses are equippedwith this type of recovery system (laminated rubber, etc.).

Since CLB has a tensile strength, it is capable of baseisolating high-rise, towering buildings, whose aspect ratiosare large.

Anti-seismic base (mat foundation slab)

It normally supports the weight of the building via abase isolation system, but in case of earthquake, itreceives the reaction force to relieve the buildingfrom vibrations.

4

From design of base-isolated houses to installation of base isolation systems,THK provides strong support.

Building of base-isolated houses involves various steps from the design to completion, ranging from technical works,such as ground survey and structural calculation, to practical works including material supply, construction andinstallation.

(Note) Judgement means one that is based on the design policy of the designer. For example, in some cases, even with those base-isolated buildings with height of 60 m or less and those constructed on category 1 ground, time calendar response analysis (ministerial approval) is selected in order to examine the plans in more details.

From design of a base-isolated house to installationof a base isolation system and its management

Buildingdesign

Building design

Height of the building

Judgement

Ground classification

Judgement

Judgement

Judgment

Building confirmation (e.g., specified administrative agency)

Company applyingTHK’s base isolation

systemTHK distributor, etc. THK

Foundation builderFoundation material

manufacturerInstallation site, etc.

Structural calculation

Position of the baseisolation layer

Groundsurvey

■ System selection■ System layout■ System estimate

■ Manufacture of thebase isolationsystem

■ Supply of the baseisolation system

■ System installationprocedure

Application forbuilding

construction

Materialorder

placement

Materialdelivery

Periodicinspection

Building of thefoundation and

installation of thebase isolation system

Baseisolationdesign

THK support items

■ System selection(1) Support with a structural

calculation systemresponding to baseisolation notification(see page 19)

(2) Referral of a partner designoffice

From building design to application for building construction

From material order placement to foundation buildingand base isolation system installation

60 m or below

Basic base isolation

Unnecessary

Technical standards (items 3 to 5 ofConstruction Ministry NotificationNo. 2009) + regulations on durability,etc.

Structural calculation (item 6 ofConstruction Ministry NotificationNo. 2009) + regulations on durability,etc.

Time calendar response analysis+ regulations on durability(ministerial approval)

Category 1 ground, or category 2 ground (no risk of liquefaction)

Over 60 m

Parts other than the basic base isolation(e.g., intermediate layer)

Necessary (paragraph 2, Article 20 of the BuildingStandard Law)

Category 3 ground, or category 2 groundwith risk of liquefaction

Application forrecommendation

Placing order for foundation material and steel basePlacing order for base isolation system installation

Placing order forbase isolation system

Placing order forbase isolation system

Delivery of baseisolation systemSystem installationprocedure

Foundation material and steelbase materialBase isolation system installation

Horizontal clearance a base-isolated building is required to secure

Ground classification Incidental conditions Application method Supplemental noteCategory 1 ground

Category 2 ground

Category 3 ground

No risk of liquefaction Risk of liquefaction

Technical standard (items 3 to 5 of Construction Ministry Notification No. 2009), or structuralcalculation (item 6 of Construction Ministry Notification No. 2009) and regulations on durability, etc.

Time calendar response analysis, etc. andregulations on durability (ministerial approval), etc.

It is necessary to take a measure toprevent the ground from subsidingsuch as soil improvement.

5

Precautions on designing a base-isolated building and installing a base isolation system

In building a base-isolated house, it is necessary to conduct a ground survey or the like. Since the building moveshorizontally in an earthquake, there are various precautions to be observed such as securing a horizontal clearanceand attention to be paid to piping.

Precautions on design

Precautions on installing a base isolation system

1. Survey of ground classificationIt is necessary to conduct a ground survey (boring) or obtain data of neighboring ground.

2. Securing a horizontal clearanceA base-isolated house is horizontally displaced from the foundation (land)in an earthquake or the like. Taking this into account, it is necessary tosecure a horizontal clearance according to the intended use. Outdoorequipment, such as that of air conditioners and boilers, must be installedon the building, instead of being placed on the foundation.In addition, it is obliged to post a notice stating that the house is base-isolated as information for third persons.

3. Structure of pipingBase-isolated buildings are horizontally displaced from the foundation (land) in an earthquakeor the like. Therefore, the piping systems such as water and sewage and gas must have flexiblestructures, and the electric wires and telephone cables need to have extra lengths.

1. Accurate leveling of theanchor plate

2. Checking the steps forinstalling CLB and RDT (RDTcentering procedure, etc.)

3. Leveling of the whole baseisolation system

4. Curing after the wholebase isolation system isinstalled

5. Removal of temporaryclamps of CLB

A Places used for passage by third persons Response displacement + 80 cmB Places used for passage by residents Response displacement + 20 cmC Places other than A and B Response displacement + 10 cm

If the response displacement is 30 cm

A 30cm+80cm=110cm

B 30cm+20cm=50cm

C 30cm+10cm=40cm

This building is a base-isolated houseThe base-isolated house moves horizontally in alarge earthquake.To avoid collision with the building, keep away fromthe surroundings of the building by approxi-mately xx cm.To prevent yourself from being caught betweenbuildings, secure an interval approximate-ly xx cm between the building and the fence orvehicle.

Example of notice board

Note: It is necessary to take ameasure to prevent the systemfrom moving during theinstallation.

technical book

Item Accuracy standard

6

Linear Guide CLB Cross TypeThe reference value of rolling friction coefficient and the upper limit of variations from the reference valueThe reference value of rolling friction coefficient of Linear Guide CLB and the upper limit of variations from thereference value are obtained from the following equations.

The reference value, definition and measurement method of the accuracy after the installationAfter installing the system, mount anchor plate and other devices so that the following definitions and accuracystandards are met.

CLB017（P0=162kN）

Vertical load: 161 kN (compression)

Friction coefficient （×1/1000）

Horizontal deformation （mm）

Friction coefficient （×1/1000）

Load ratio P/P0

ρ=51％ (During compression)

Afte

rins

talla

tion Block displacement

Rail tilt angle θX

Rail crosswise tilt angle θY

Rail twist angle θZ

Installation level difference Δh

±5 mm or belowθX≦1/500 radθY≦1/500 radθZ≦1/300 radΔh≦±0.01H and Δh≦1.5mm

Direction Model number Rolling friction coefficient Upper limit of variations from µ

Compression

Tension

011～133031H～133H

250～780250H～780H

011～133031H～133H

250～780250H～780H

µ＝(1.2+7.8×Ｐ/Ｐ0L)/1000

µ＝(1.2+3.6×Ｐ/Ｐ0L)/1000

µ＝(0.4+6.0×tＰ/tＰ0L)/1000

µ＝(1.2+5.0×tＰ/tＰ0L)/1000

µmax1＝µ×1.2µmax2＝µ＋0.002

µmax1＝µ×1.2µmax2＝µ＋0.001

µmax＝µ＋0.002

µmax＝µ＋0.001

A-A’ arrow view B-B’ arrow view Plane view

* The upper limit of variations from the rollingfriction coefficient is either µ max1 or µ max2,whichever is greater, obtained from thefollowing equation.

* P and tP are loads applied on the bearing.

Reference value

Upper limit ofvariations

│(RL1－RL2)│/2θX=│(h1+h3)－(h2+h4)│/(FB1×2)θY=│(h1+h2)－(h3+h4)│/(FB2×2)θZ=│d1－d2│/L

─

840

860

880

920

940

1000

1020

1060

1070

2030

4085

32.5

6060

92.5

8534

5279

111

136

199

248

335

441

940

960

980

1020

1040

1100

1120

1160

1170

2030

4060

82.5

5560

8060

3858

8712

315

021

626

936

347

610

4010

6010

8011

2011

4012

0012

2012

6012

7020

3040

3570

5060

67.5

3541

6496

134

163

234

290

390

510

1140

1160

1180

1220

1240

1300

1320

1360

1370

2030

4085

57.5

4560

5585

4570

104

145

176

252

311

417

545

1240

1260

1280

1320

1340

1400

1420

1460

1470

2030

4060

4540

6042

.560

4975

112

156

189

269

332

444

579

1340

1360

1380

1420

1440

1500

1520

1560

1570

2030

4035

32.5

3560

92.5

3553

8112

116

720

228

635

347

261

4

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350

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CLB0

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CLB0

21CL

B031

CLB0

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(M12

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(M16

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(M16

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(M20

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100

100

100

150

125

110

100

125

150

125

145

160

200

230

275

305

340

370

110

130

140

170

190

220

250

280

330

7290

100

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170

195

215

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102

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513

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205

244

274

290

336

270

300

345

370

425

465

2832

3845

4550

1818

1818

2224

(M16

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(M16

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(M20

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150

125

110

100

125

150

200

230

275

305

340

370

170

190

220

250

280

330

120

140

170

195

215

260

171

198.

824

4.4

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0.4

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829

36.5

4344

4857

4553

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412

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4426

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824

132

545

545

555

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210

6713

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6221

0622

4212

715

518

123

326

228

2

Un

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mm

Te

nsi

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920

940

1000

1020

1060

1070

8532

.560

6092

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135

180

269

348

426

549

1020

1040

1100

1120

1160

1170

6082

.555

6080

6014

819

829

337

946

259

411

2011

4012

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2012

6012

7035

7050

6067

.535

162

216

318

410

498

639

1220

1240

1300

1320

1360

1370

8557

.545

6055

8517

623

434

244

153

468

413

2013

4014

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2014

6014

7060

4540

6042

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189

252

367

471

570

729

1420

1440

1500

1520

1560

1570

3532

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6092

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203

270

391

502

606

773

Limit

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350

400

450

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550

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CLB

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CLB3

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B500

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HCL

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HCL

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448

538

599

730

478

578

649

770

465

555

630

740

465

555

630

740

4045

5060

5565

7580

2426

3033

2426

3033

(M22

)(M

24)

(M27

)(M

30)

(M22

)(M

24)

(M27

)(M

30)

140

150

150

200

140

150

150

200

370

450

520

620

370

450

520

620

330

410

465

560

330

410

465

560

419

519

584

722

419

519

584

722

7085

9812

070

8598

120

130

160

180

230

130

160

180

230

2451

3775

4903

7649

2451

3775

4903

7649

00

00

00

00

4902

7550

9806

1529

849

0275

5098

0615

298

410

481

588

880

948

1366

1777

2171

3471

5171

6120

7957

3471

5171

6120

7957

245

315

388

468

245

315

388

468

1570

1670

1770

1870

1570

1670

1770

1870

8585

6013

585

8560

135

908

1477

1934

3216

1079

1767

2369

3648

1670

1770

1870

1970

1670

1770

1870

1970

6560

110

8565

6011

085

951

1538

2010

3329

1133

1845

2470

3784

1770

1870

1970

2070

1770

1870

1970

2070

4535

8513

545

3585

135

994

1599

2086

3443

1187

1923

2570

3920

1870

1970

2070

2170

1870

1970

2070

2170

9585

6085

9585

6085

1037

1660

2163

3556

1241

2001

2671

4057

1970

2070

2170

2270

1970

2070

2170

2270

7560

110

135

7560

110

135

1080

1721

2239

3669

1295

2080

2772

4193

Limit

defor

matio

nδs

t

550

600

650

700

750

CLB2

50CL

B385

CLB5

00CL

B780

CLB2

50H

CLB3

85H

CLB5

00H

CLB7

80H

Up

per

:Fl

ang

e p

late

leng

th L

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m)

Mid

dle

:Fl

ange

pla

te m

ount

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hole

out

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dist

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g (m

m)

Low

er:

Pro

duc

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s (k

g)

Lim

it d

efor

mat

ion:

dim

ensi

on a

t w

hich

tra

vel

from

the

neut

ral p

ositi

on is

pos

sib

leF

or

limit

de

form

ati

on

s o

the

r th

an

th

e t

ab

le a

bo

ve,

cont

act T

HK

.

technical book

10

Linear Rotary Bearing CLB キ TypeThe reference value of rolling friction coefficient and the upper limit of variations from the reference valueThe reference value of rolling friction coefficient of Linear Rotary Bearing CLB and the upper limit of variations fromthe reference value are obtained from the following equations.


Compression

Tension

µ＝(1.2+3.6×P/P0L)/1000

µ＝(1.2+5.0×tP/tP0L)/1000

1000T～1560T

1000TH～1560THµmax＝µ＋0.002

Friction coefficient （×0.001）

Compressive load ratio P/P0

* P and tP are loads applied on thebearing.

Reference value




Afte

rins

talla


Rail tilt angle θX






─


11

Dim

en

sio

na

l ta

ble

La

nd, T

rans

por

t and

Infr

astr

uctu

re M

inst

er A

pp

rova

l No.

: M

VB

R-0

267,

026

8, 0

269

Mod

el n

umbe

r of

the

syst

emC

LB10

00T

CLB

1560

TC

LB10

00TH

CLB

1560

TH

Ext

erna

l dim

ensi

ons

Fla

nge

plat

e

LM b

lock

LM r

ail

Long

-term

per

miss

ible

load

(kN

)

Shor

t-ter

m p

erm

issibl

e loa

d(k

N)

Verti

cal r

igid

ity (k

N/m

m)

Hei

ght

Wid

th

Thi

ckne

ss

Hol

e di

amet

er

(Bol

t use

d)

Long

itudi

nal p

itch

Wid

th p

itch

Wid

th

Leng

th

Cle

aran

ce

Hei

ght

Wid

th

Com

pres

sion

Ten

sion

Com

pres

sion

Ten

sion

Com

pres

sion

Ten

sion

H

WF

PL

WF

PS

TF

PL

TF

PS

DF

P

(BF

P)

PF

PL

PF

PS

PF

PS

1

PF

PS

2

W L G1

M1

W1

P0L

tP0L

P0A

S

tP0A

S

K tK

599

730

659

790

660

760

660

760

1270

1510

1270

1510

5060

8595

5060

7585

3033

3033

(M27

)(M

30)

(M27

)(M

30)

150

200

150

200

520

620

520

620

270

320

270

320

305

375

270

320

465

560

465

560

584

722

584

722

145

190

145

190

9812

098

120

180

230

180

230

9800

1530

098

0015

300

00

00

1961

030

590

1961

030

590

940

1380

3550

4340

1200

015

300

1200

015

300

1080

1100

1110

1150

2380

1770

2620

1870

2380

1770

2620

1870

6560

110

135

6560

110

135

2480

1870

2720

1970

2480

1870

2720

1970

4011

060

8540

110

6085

2580

1970

2820

2070

2580

1970

2820

2070

9085

110

135

9085

110

135

2680

2070

2920

2170

2680

2070

2920

2170

6560

6085

6560

6085

2780

2170

3020

2270

2780

2170

3020

2270

4010

110

135

4010

110

135

Upp

erLo

wer

Upp

erLo

wer

Upp

erLo

wer

Upp

erLo

wer

Limit

defor

matio

nδs

t

550

600

650

700

750

CLB

1000

TC

LB15

60T

CLB

1000

TH

CLB

1560

TH

3464

5853

4331

6947

3580

6025

4490

7169

3695

6197

4648

7392

3811

6370

4807

7614

3927

6542

4965

7837

Un

it :

mm

Te

nsi

on

se

tS

tan

da

rd s

et

Up

per

:Fl

ang

e p

late

leng

th L

FPL,

LFP

S(m

m)

Mid

dle

:Fl

ange

pla

te m

ount

ing

hole

out

er e

dge

dist

ance

g (m

m)

Low

er:

Pro

duc

t mas

s (k

g)

Lim

it d

efor

mat

ion:

dim

ensi

on a

t w

hich

tra

vel

from

the

neut

ral p

ositi

on is

pos

sib

leF

or

limit

de

form

ati

on

s o

the

r th

an

th

e t

ab

le a

bo

ve,

cont

act T

HK

.

technical book

12

Linear Rotary Bearing CLB ＃ TypeThe reference value of rolling friction coefficient and the upper limit of variations from the reference valueThe reference value of rolling friction coefficient of Linear Rotary Bearing CLB and the upper limit of variations fromthe reference value are obtained from the following equations.


Compression

Tension

µ＝(1.2+3.6×P/P0L)/1000

µ＝(1.2+5.0×tP/tP0L)/1000

2000F～3120F

2000FH～3120FHµmax＝µ＋0.002

Friction coefficient （×0.001）

Compressive load ratio P/P0

* P and tP are loads applied on thebearing.



Afte

rins

talla


Rail tilt angle θX






─

Reference value



13

Dim

en

sio

na

l ta

ble

La

nd, T

rans

por

t and

Infr

astr

uctu

re M

inst

er A

pp

rova

l No.

: M

VB

R-0

270,

027

1, 0

272

Mod

el n

umbe

r of

the

syst

emC

LB20

00F

CLB

3120

FC

LB20

00F

HC

LB31

20F

H

Ext

erna

l dim

ensi

ons

Fla

nge

plat

e

LM b

lock

LM r

ail

Long

-term

per

miss

ible

load

(kN

)

Shor

t-ter

m p

erm

issibl

e loa

d(k

N)

Verti

cal r

igid

ity (k

N/m

m)

Hei

ght

Wid

th

Thi

ckne

ss

Hol

e di

amet

er

(Bol

t use

d)

Long

itudi

nal p

itch

Wid

th p

itch

Wid

th

Leng

th

Cle

aran

ce

Hei

ght

Wid

th

Com

pres

sion

Ten

sion

Com

pres

sion

Ten

sion

Com

pres

sion

Ten

sion

H WF

P

TF

P

DF

P

(BF

P)

PF

PL

PF

PS

1

PF

PS

2

W L G1

M1

W1

P0L

tP0L

P0A

S

tP0A

S

K tK

599

730

669

800

1270

1510

1270

1510

5060

8595

3033

3033

(M27

)(M

30)

(M27

)(M

30)

150

200

150

200

270

320

270

320

305

375

270

320

465

560

465

560

584

722

584

722

145

190

145

190

9812

098

120

180

230

180

230

1961

030

590

1961

030

590

00

00

3922

061

190

3922

061

190

1880

2760

7100

8680

2400

030

600

2400

030

600

1980

2040

2220

2300

Un

it :

mm

Te

nsi

on

se

tS

tan

da

rd s

et

Limit

defor

matio

nδs

t

550

600

650

700

750

CLB

2000

FC

LB31

20F

CLB

2000

FH

CLB

3120

FH

2380

2620

2380

2620

6511

065

110

5999

1064

776

4912

890

2480

2720

2480

2720

4060

4060

6152

1087

678

7213

201

2580

2820

2580

2820

9011

090

110

6305

1110

680

9413

513

2680

2920

2680

2920

6560

6560

6458

1133

583

1613

825

2780

3020

2780

3020

4011

040

110

6611

1156

485

3914

137

Up

per

:Fl

ang

e p

late

leng

th L

FP(m

m)

Mid

dle

:Fl

ange

pla

te m

ount

ing

hole

out

er e

dge

dist

ance

g (m

m)

Low

er:

Pro

duc

t mas

s (k

g)

Lim

it d

efor

mat

ion:

dim

ensi

on a

t w

hich

tra

vel

from

the

neut

ral p

ositi

on is

pos

sib

leF

or

limit

de

form

ati

on

s o

the

r th

an

th

e t

ab

le a

bo

ve,

cont

act T

HK

.

technical book

14

Item Direction Accuracy standard

Viscous Damping System RDT

The reference value of the resistance (damping force)

Calculation of the resistance (damping force)The reference value of the resistance (damping force) of viscousdamping system RDT is obtained from the following equation.Pn =1.16・(α・QV+2.2)...(reference equation)

Legends:Pn: Resistance (kN)a: Repetitive dependence coefficientQv: Viscous resistance (kN) Qv=S･η(Vs,t)･Vs･AS: Amplification factor S=π･Dn/LdDn: Outer diameter of inner tube (m) Ld: Lead (m)h(Vs, t): Apparent viscosity η(Vs,t)=ηt/(1+bVsβ)×10－6

b=0.000472･ηt0.276 β=0.308･ηt0.081

ht: Vs= Dynamic viscosity in low-speed constant region with viscous body temperatureat t℃ (cSt) ηt=1.02(25－t)η25

h25: Vs = Dynamic viscosity in low-speed constant region with viscous body temperatureat 25℃ (cSt)

Vs: Shearing strain rate (sec－1) Vs=S･Vn/dyVn: Axial velocity (m/sec) dy: Shearing clearance (m)A: Shearing effective area (m2) A=Dn･π･LeLe: Effective length (m)

RDT05S 2.7 3.1 3.4 4.0 4.4 4.7 4.9 5.0 5.2

RDT1S 3.0 4.2 5.1 6.6 7.8 8.6 9.2 9.7 10.1

RDT2S 3.5 6.1 8.2 11.6 14.6 16.5 17.9 19.0 19.9

RDT4S 4.8 10.6 15.0 22.4 28.8 32.8 35.7 38.0 39.9

RDT6S 6.1 15.0 21.8 33.3 43.1 49.2 53.7 57.3 60.2

RDT8S 7.3 19.3 28.5 43.9 57.2 65.4 71.5 76.3 80.2

When calculated Repetitive dependence coefficient (α) Temperature (t)Reference value 0.85 20°CMaximum damping force 1.00 0°C

Full resistanceforce Pn

Inertial resistanceforce Qi

Resistance force

Frictional resistanceforce Qf

Viscous resistanceforce Qv

Displacement

Axial damping force (kN)

Axial velocity (m/sec)


Displacement (mm)

: Calculated value : Experiment value

Reference value of resistance (damping force)

Modelnumber of

system

The reference value of the accuracy after the installation

After installing the system, mount anchor plate and otherdevices so that the following accuracy standards are met.

Axial velocity Vn m/sec (α= 0.85, t =20±°C）

0.01 0.05 0.10 0.25 0.50 0.75 1.00 1.25 1.50


After

instal

lation Ball screw shaft neutral displacement ――― ±20 mm or below

Level angle Elevation θlv≦1/200 radRun-out angle Plane θca≦1/100 rad

Ball screw neutral displacement

Level angle (elevation)

RDT1S

Axial velocity-axial damping force performance diagram

All resistance force components

Level angle (plane)

15

Dim

en

sio

na

l ta

ble

fo

r R

DT

- s

ho

rt t

ype

La

nd, T

rans

por

t and

Infr

astr

uctu

re M

inst

er A

pp

rova

l No.

: M

VB

R-0

220

*1: L

imit

def

orm

atio

n =

dim

ensi

on a

t whi

ch tr

avel

from

the

neut

ral p

ositi

on is

pos

sib

le*2

: Rep

etiti

ve d

epen

den

ce c

oeffi

cien

t α=

1.0

whe

n th

e te

mp

erat

ure

is 0

°C*3

: Rep

etiti

ve d

epen

den

ce c

oeffi

cien

t α=

0.8

5 w

hen

the

spee

d is

0.0

1 to

1.5

0 m

/sec

at t

emp

erat

ure

20°C

*4: S

pec

ify C

eq s

o th

at th

e w

ork

amou

nt Δ

W o

f the

axi

al fo

rce

thro

ugho

ut o

ne c

ycle

is e

qua

l to

the

area

of t

he e

llip

se.

－50

0－

650

－50

0－

650

－50

0－

650

－50

0－

650

－50

0－

650

－50

0－

650

732

882

801

951

935

1085

1052

1202

1202

1352

1317

1467

1262

1562

1331

1631

1465

1765

1582

1882

1732

2032

1847

2147

941

1241

885

1185

773

1073

671

971

521

821

416

716

500

650

500

650

500

650

500

650

500

650

500

650

1112

1718

3335

6163

7880

9699

202

271

405

522

672

787

182

247

337

488

638

752

2025

3236

3640

2025

3236

3640

9810

812

415

015

015

6M

5M

6M

6M

8M

8M

84

44

44

4(5

2)(5

2)(5

2)(6

3)(8

7)(8

7)

1.50

1.50

1.50

1.50

1.50

1.50

5.9

12.3

25.0

50.7

77.0

102.

92.

7～5.

23.

0～10

.13.

5～19

.94.

8～39

.96.

1～60

.27.

3～80

.234

1.4～

4.2

371.

2～8.

042

5.1～

15.6

556.

0～31

.268

2.2～

47.0

803.

9～62

.6

RD

T05

SR

DT

1SR

DT

2SR

DT

4SR

DT

6SR

DT

8S

L

Lmax

Lmin

L1 L0 D Ld D0

M Q MB

δst

Vm

ax

Fm

ax F

Ceq －

mm

mm

mm

mm

mm

mm

mm

mm －－ mm

mm

m/s

ec

kN kN

kN・s

ec/m

kg

Mo

de

l nu

mb

er

of

syst

em

Ove

rall

syst

em le

ngth

Max

imum

ext

ensi

on

Min

imum

com

pres

sive

leng

th

Mai

n un

it le

ngth

Max

imum

pro

trus

ion

leng

th

Scr

ew s

haft

diam

eter

Lead

Out

er tu

be d

iam

eter

Mou

ntin

g bo

lt

Buf

fer

heig

ht

Lim

it de

form

atio

n*1

Lim

it sp

eed

Max

imum

res

ista

nce

*2

Res

ista

nce

forc

e*3

Equiv

alent

visco

sity d

ampin

g coe

fficien

t*3

*4

Mas

s

Desig

natio

n

Qua

ntity

technical book

16

Dim

ensi

onal

tab

le f

or R

DT

– 1

00,0

00 c

St

type

Lan

d, T

rans

port

and

Infra

stru

ctur

e M

inst

er A

ppro

val N

o. :

MVB

R-0

221

Mo

de

l nu

mb

er

of

syst

em

RD

T2

RD

T4

RD

T6

RD

T8

RD

T10

RD

T12

RD

T14

RD

T16

RD

T18

RD

T20

Ove

rall

syst

em le

ngth

Max

imum

ext

ensi

on

Minim

um co

mpre

ssive

leng

th

Mai

n un

it le

ngth

Max

imum

pro

trusio

n len

gth

Scr

ew s

haft

diam

eter

Lead

Out

er tu

be d

iam

eter

Mou

ntin

g bo

lt

Buf

fer

heig

ht

Lim

it de

form

atio

n*1

Lim

it sp

eed

Max

imum

resis

tanc

e*2

Res

ista

nce

forc

e*3

Equivale

nt visco

sity dam

ping coe

fficient

*3 *4

Mas

s

L

Lmax

Lmin

L1 L0 D Ld D0

M Q MB

δst

Vm

ax

Fm

ax F

Ceq －

mm

mm

mm

mm

mm

mm

mm

mm －－ mm

mm

m/s

ec

kN kN

kN・s

ec/m

kg

－50

0－

650－

500－

650－

500－

650－

500－

650－

500－

650－

500－

650－

500－

650－

500－

650－

500－

650－

500－

650

962

1112

1152

1302

1327

1477

1354

1504

1446

1596

1551

1701

1656

1806

1756

1906

1861

2011

1966

2116

1492

1792

1682

1982

1857

2157

1884

2184

1976

2276

2081

2381

2186

2486

2286

2586

2391

2691

2496

2796

745

1045

572

872

397

697

381

681

329

629

224

524

119

419

1931

9－

214

－10

9

4345

7678

9698

115

118

192

196

203

207

214

218

225

229

236

240

247

251

500650500650500650500650500650500650500650500650500650500650

Desig

natio

n

Qua

ntity

432

622

797

824

916

1021

1126

1226

1331

1436

397

581

756

780

857

962

1067

1167

1272

1377

3236

3640

5050

5050

5050

3236

3640

5050

5050

5050

132

150

150

165

202

202

202

202

202

202

Ｍ6

M8

M8

M8

M14

M14

M14

M14

M14

M14

44

44

44

44

44

(63)

(63)

(87)

(87)

(117

)(1

17)

(117

)(1

17)

(117

)(1

17)

1.50

1.

50

1.50

1.

50

1.50

1.

50

1.50

1.

50

1.50

1.

50

25.1

51

.1

77.2

10

2.8

128.

8 15

5.0

181.

2 20

6.1

232.

3 25

8.5

3.7～

19.9

4.8～

39.9

5.9～

59.9

7.2～

79.9

8.4～

99.9

9.5～

120.

110

.7～

140.

311

.8～

159.

612

.9～

179.

814

.1～

200.

044

9.6～

15.7

560.

0～31

.167

1.0～

46.7

803.

2～62

.292

1.1～

77.8

1039

.1～93

.411

57.0～

109.1

1269

.4～12

4.013

87.4～

139.7

1505

.3～15

5.4

*1: L

imit

def

orm

atio

n =

dim

ensi

on a

t whi

ch tr

avel

from

the

neut

ral p

ositi

on is

pos

sib

le*2

: Rep

etiti

ve d

epen

den

ce c

oeffi

cien

t α=

1.0

whe

n th

e te

mp

erat

ure

is 0

°C*3

: Rep

etiti

ve d

epen

den

ce c

oeffi

cien

t α=

0.8

5 w

hen

the

spee

d is

0.0

1 to

1.5

0 m

/sec

at t

emp

erat

ure

20°C

*4: S

pec

ify C

eq s

o th

at th

e w

ork

amou

nt Δ

W o

f the

axi

al fo

rce

thro

ugho

ut o

ne c

ycle

is e

qua

l to

the

area

of t

he e

llip

se.

17

Dim

ensi

onal

tab

le f

or R

DT

– 3

00,0

00 c

St

type

Lan

d, T

rans

port

and

Infra

stru

ctur

e M

inst

er A

ppro

val N

o. :

MVB

R-0

222

Mo

de

l nu

mb

er

of

syst

em

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technical book

18

Case Examples of Design

This is an irregularly shaped wooden house inwhich one of the corners is cut and the center ofone side is recessed. Since THK’s base isolationsystem provides support, damping and recovery indifferent places, it can base-isolate even such anirregularly shaped wooden house.

Characteristics

Base isolation systemsCLB011-400 : 5unitsCLB017-400 : 5unitsHDR-200 : 5unitsRDT2-400 : 4units

Building overviewBase-isolated area : 107.1m2

1st floor : 94.8m2

2nd floor : 97.9m2

Loft : 30.6m2

This is a steel-framed house in which agarage is built in part of the 1st floor.Since THK’s base isolation system hasa very small friction coefficient, it canbase-isolate even a building with loadfluctuations like this house.

Characteristics

Base isolation systemsCLB017-400 : 4unitsCLB021-400 : 8unitsHDR-200 : 8unitsRDT2-400 : 4units

Building overviewBase-isolated area : 94.7m2

1st floor : 90.9m2

2nd floor : 75.8m2

3rd floor : 66.7m2

19

Information on THK’s structural calculation system responding to base isolation notification

Our website shows a system with a function to perform structural calculation of base-isolated buildingsresponding to Construction Ministry Notification No. 2009 (compliant with the content of its revision in 2004).The result of calculation can be printed. You can use it as a structural calculation sheet.Address of the structural calculation system website: http://www.menshin.net/thkuser/index.htm

- Automatic selection of an optimal base isolationsystem model through specif ication of adesired cycle and response displacement

- Automatic calculation of Ai distribution factor- Supports wind load and snow load- Arbitrary temperature correction- Detail output of calculation process

- Damping system placement at any position- Outputting a resilience characteristic diagram

of the base isolation layer- Outputting a working load/distortion relation

diagram of a base isolation system- Outputting a system layout drawing and an

eccentricity/rigidity center position diagram

System overview

How to use the system1. Register as a user on the top page (free).

After registration, a password is sent to theregistered mail address.

2. Enter the user ID (registered mail address) andthe password distributed by mail in the loginscreen to log in. You can also change your password in the loginscreen.

3. an overview of the building and data on theground (simplified calculation is also available).

4. Select a system, or enter the desired cycle andresponse displacement, and then determine thelayout of the recovery system. Calculation isautomatically started.

Screen of the result of automatic calculation after data entry

Login screen

technical book

Precautions on Use●Precautions on handing (observe the following points to avoid danger)

• Tilting CLB with the temporary clamps removed may cause the LM block or LM rail to slide by their own weights, anddamage it or fall onto the foot to cause injury. During transportation or in any process where the product may betilted in installation, do not remove the temporary clamps.

• Dropping or hitting the product may damage it. Giving impact to the product could lose its function even if it looksintact.

• Disassembling the product may cause dust to enter the product or degrade the assembly accuracy of parts, whichcould make the product unable to maintain its original performance. Do not disassemble the product.

• When transporting RDT, holding the ball screw may damage it. Be sure to hold RDT itself when transporting it.- Leaning down the buffer of RDT from the horizontal position may let air enter it and make RDT unable to maintain its

original performance.

●Lubrication • Do not wipe off the grease applied on the product.• The system contains AFA Grease (THK product), with which we have applied for acquisition of Land, Transport and

Infrastructure Minster approval for the system. When replenishing grease during installation or periodical inspection,do not replenish other grease.

●Precautions on use• When installing the system, take care not to contaminate the system with rain, dirt or dust as much as possible, and

cure the system after it is installed. In addition, remove the curing equipment before the construction of the building.• Take a measure to prevent the base isolation layer from being immersed from rain during the installation work.• CLB is provided with temporary clamps for preventing fall during transportation and positioning the system when

installing steel frames. Remove them before the construction of the building.

20070302 Printed in Japan

HEAD OFFICE 3-11-6, NISHI-GOTANDA, SHINAGAWA-KU, TOKYO 141-8503 JAPAN INTERNATIONAL SALES DEPARTMENT PHONE:+81-3-5434-0351 FAX:+81-3-5434-0353

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Phone:+65-6884-5500 Fax:+65-6884-5550

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Phone:+91-80-2330-1524

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Global site : http://www.thk.com/

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DÜSSELDORF OFFICEPhone:+49-2102-7425-0 Fax:+49-2102-7425-299STUTTGART OFFICEPhone:+49-7150-9199-0 Fax:+49-7150-9199-888MÜNCHEN OFFICEPhone:+49-8937-0616-0 Fax:+49-8937-0616-26U.K. OFFICEPhone:+44-1908-30-3050 Fax:+44-1908-30-3070ITALY MILANO OFFICEPhone:+39-039-284-2079 Fax:+39-039-284-2527ITALY BOLOGNA OFFICEPhone:+39-051-641-2211 Fax:+39-051-641-2230SWEDEN OFFICEPhone:+46-8-445-7630 Fax:+46-8-445-7639 AUSTRIA OFFICEPhone:+43-7229-51400 Fax:+43-7229-51400-79SPAIN OFFICEPhone:+34-93-652-5740 Fax:+34-93-652-5746

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NORTH AMERICATHK AMERICA,Inc.

HEADQUARTERSPhone:+1-847-310-1111 Fax:+1-847-310-1271CHICAGO OFFICEPhone:+1-847-310-1111 Fax:+1-847-310-1182NEW YORK OFFICEPhone:+1-845-369-4035 Fax:+1-845-369-4909ATLANTA OFFICEPhone:+1-770-840-7990 Fax:+1-770-840-7897LOS ANGELES OFFICEPhone:+1-949-955-3145 Fax:+1-949-955-3149SAN FRANCISCO OFFICEPhone:+1-925-455-8948 Fax:+1-925-455-8965BOSTON OFFICEPhone:+1-781-575-1151 Fax:+1-781-575-9295DETROIT OFFICEPhone:+1-248-858-9330 Fax:+1-248-858-9455TORONTO OFFICEPhone:+1-905-820-7800 Fax:+1-905-820-7811

SOUTH AMERICATHK BRASIL LTDA.

Phone:+55-11-3767-0100 Fax:+55-11-3767-0101CHINATHK (CHINA) CO.,LTD.

HEADQUARTERSPhone:+86-411-8733-7111 Fax:+86-411-8733-7000

SHANGHAI OFFICEPhone:+86-21-6219-3000 Fax:+86-21-6219-9890

All rights reserved.

●“LM Guide” are the registered trademarks of THK Co., Ltd.●The photo may differ slightly in appearance from the actual product.●The appearance and specifications of the product are subject to change without notice. Contact THK before placing an order.●Although great care has been taken in the production of this catalog, THK will not take any responsibility for damage resulting from typographical errors or

omissions.●For the export of our products or technologies and for the sale for exports, THK in principle complies with the foreign exchange law and the Foreign

Exchange and Foreign Trade Control Law as well as other relevant laws.For export of THK products as single items, contact THK in advance.

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