struct 1997 ubc lateral2
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8/11/2019 Struct 1997 UBC Lateral2
http://slidepdf.com/reader/full/struct-1997-ubc-lateral2 1/2
(Version 3.1)
(1997 Unifo rm Bu ildin g Code, Section 1630.2.1)
Occupancy Category = Hazardous Facilities ──► Seismic Importance Factor, I = 1.25
(Table 16-K) Seismic Importance Factor, Ip = 1.50
Wind Importance Factor, Iw = 1.15
Seismic Zone = 2B ──► Seismic Zone Factor, Z = 0.2
(Table 16-I)
Soil Profile Type = SB ──► (16-Q) Seismic Coefficient, Ca = 0.20
(Table 16-J) (16-R) Seismic Coefficient, Cv = 0.20
Calculated Ca = 0.66
Calculated Cv = 1.92
Basic Resisting System = Dual System Numerical Coefficient, Ct = 0.020
Lateral Resisting Elements = Concrete Shear Walls System Coefficient, R = 6.5
Amplification Factor, Omega = 2.8
Building Height, hn (ft) = 191 ft ──► Building Period, T = 1.03 Second(s)
Formula (30-4) = [ Cv I / R T ] W = 0.037 W
Formula (30-5) = [ 2.5 Ca I / R ] W = 0.096 W
Formula (30-6) = 0.11 Ca I W = 0.028 W
(30-4) need not exceed (30-5) and shall not be less than (30-6) ──► TOTAL DESIGN BA SE SHEAR = 0.037 W
Section 1612.3 ──► TOTAL DESIGN BA SE SHEAR = 0.027 W
The following information are used for Seismic Zone 4 structures only!
Seismic Source DefinitionMaximum Moment Magnitude, M
M >= 7.0
M >= 7.0
M < 7.0
M >= 6.5
M < 6.5
Closest Distance to Known Seismic Source = 4 km
= 2.5 miles
Na = 1.30
Nv = 1.73
SEISMIC LOAD CALCULATIONS 8/16/2014
When the soil properties are not known in sufficient detail to determine the soil profile type,
Type SD shall be used
──►
( Eh )
( Eh / 1.
Seismic Source Type Seismic Source DescriptionSlip Rate
Faults that are capable of producing large magnitude events
and that have a high rate of seismic activitySR >= 5
All faults other than Types A and C
SR < 5
SR > 2
SR < 2
Faults that are not capable of producing large magnitude
earthquakes and that have a relatively low rate of seismic
activity
SR <= 2
Developed by: Forum Engineers
Home
Copyright© 1994~2002 Forum Engineers. All rights reserved.
8/11/2019 Struct 1997 UBC Lateral2
http://slidepdf.com/reader/full/struct-1997-ubc-lateral2 2/2
(Version 3.1)
(1997 Unifo rm Bu ildin g Code, Section 1630.2.1)
Occupancy Category = Hazardous Facilities ──► Seismic Importance Factor, I = 1.25
(Table 16-K) Seismic Importance Factor, Ip = 1.50
Wind Importance Factor, Iw = 1.15
Seismic Zone = 2B ──► Seismic Zone Factor, Z = 0.2
(Table 16-I)
Soil Profile Type = SB ──► (16-Q) Seismic Coefficient, Ca = 0.20
(Table 16-J) (16-R) Seismic Coefficient, Cv = 0.20
Calculated Ca = 0.66
Calculated Cv = 1.92
Basic Resisting System = Dual System Numerical Coefficient, Ct = 0.020
Lateral Resisting Elements = Concrete Shear Walls System Coefficient, R = 6.5
Amplification Factor, Omega = 2.8
Building Height, hn (ft) = 191 ft ──► Building Period, T = 1.03 Second(s)
Formula (30-4) = [ Cv I / R T ] W = 0.037 W
Formula (30-5) = [ 2.5 Ca I / R ] W = 0.096 W
Formula (30-6) = 0.11 Ca I W = 0.028 W
(30-4) need not exceed (30-5) and shall not be less than (30-6) ──► TOTAL DESIGN BA SE SHEAR = 0.037 W
Section 1612.3 ──► TOTAL DESIGN BA SE SHEAR = 0.027 W
The following information are used for Seismic Zone 4 structures only!
Seismic Source DefinitionMaximum Moment Magnitude, M
M >= 7.0
M >= 7.0
M < 7.0
M >= 6.5
M < 6.5
Closest Distance to Known Seismic Source = 4 km
= 2.5 miles
Na = 1.30
Nv = 1.73
When the soil properties are not known in sufficient detail to determine the soil profile type,
Type SD shall be used
8/16/2014SEISMIC LOAD CALCULATIONS
SR >= 5
SR < 5
SR > 2 All faults other than Types A and C
──►
( Eh )
( Eh / 1.
Seismic Source DescriptionSlip Rate
Faults that are capable of producing large magnitude events
and that have a high rate of seismic activity
SR < 2
SR <= 2
Seismic Source Type
Faults that are not capable of producing large magnitude
earthquakes and that have a relatively low rate of seismic
activity
Developed by: Forum Engineers
Home
Copyright© 1994~2002 Forum Engineers. All rights reserved.