|
ASCE 7-22
[16]
|
Requirements
|
1.9.5 miles (15 km) or less from the surface projection of a known active fault capable of producing Mw 7 or larger events, or
2.6.25 miles (10 km) or less from the surface projection of a known active fault capable of producing Mw 6 or larger, but smaller than Mw 7, events.
|
|
Exceptions
|
1.Faults with estimated slip rate less than 0.04 in. (1 mm) per year shall not be considered in determining whether a site is a near-fault site.
2.The surface projection used in the determination of near-fault site classification shall not include portions of the fault at depths of 6.25 mi (10 km) or greater.
|
|
ASCE 7-16
[2]
|
Requirements
|
1.9.5 miles (15 km) of the surface projection of a known active fault capable of producing Mw 7 or larger events
2.6.25 miles (10 km) of the surface projection of a known active fault capable of producing Mw 6 or larger events
|
|
Exceptions
|
1.Faults with estimated slip rate along the fault less than 0.04 in. (1 mm) per year shall not be considered
2.The surface projection shall not include portions of the fault at depths of 6.25 mi (10 km) or greater
|
|
NEHRP 2020
[17]
|
Requirements
|
1.9.5 miles (15 km) of the surface projection of a known active fault capable of producing Mw 7 or larger events, or
2.6.25 miles (10 km) of the surface projection of a known active fault capable of producing Mw 6 or larger events.
|
|
Exceptions
|
1.Faults with estimated slip rate along the fault less than 0.04 in. (1 mm) per year shall not be considered.
2.The surface projection shall not include portions of the fault at depths of 6.25 mi (10 km) or greater.
|
|
California Building Code (2016)
[18]
|
Requirements
|
1. Where site is located within 3.1 miles (5 km) of an active fault at least seven ground motions shall be analyzed and response parameters shall be based on larger of the average of the maximum response with ground motions applied as follows:
1.Each of the ground motions shall have their maximum component at the fundamental period aligned in one direction.
2.Each of the ground motion's maximum component shall be rotated orthogonal to the previous analysis direction.
2. Where site is located more than 3.1 miles (5 km) from an active fault at least 10 ground motions shall be analyzed. The ground motions shall be applied such that one-half shall have their maximum component aligned in one direction and the other half aligned in the orthogonal direction. The average of the maximum response of all the analyses shall be used for design.
|
|
Exceptions
|
|
|
California Building Code (2010)
[19]
|
Requirements
|
According to section 1615A.1.25 of the California Building Code, at sites within 5 kilometers (km) (3.1 miles, mi) from an active fault that dominates the earthquake hazard, each pair of ground-motion components shall be rotated to the fault-normal and fault-parallel (FN/FP) directions for 3D RHAs.
|
|
Exceptions
|
|
|
AASHTO 2009
[20]
|
Requirements
|
According to Section 3.4.2.1, sites located within 6 mi of an active surface or shallow fault, as depicted in the USGS Active Fault Map, near-fault effects on ground motions may be considered to determine if these could significantly influence the bridge response
|
|
Exceptions
|
|