A note on strength-reduction factors for design of structures near earthquake faults

✍ Scribed by Reza S. Jalali; Mihailo D. Trifunac

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 923 KB
• Volume: 28
• Category: Article
• ISSN: 0267-7261
• DOI: 10.1016/j.soildyn.2007.06.010

✦ Synopsis

Strength-reduction factors are analyzed for simplified near-fault, fault-normal and fault-parallel strong-motion displacements. It is shown that the common design rules for selection of the strength-reduction factors are conservative and properly describe the reduction amplitudes near faults of strong earthquakes, for fault-normal pulses. However, for fault-parallel displacements, the same reduction factors are not conservative and should be changed. It is recommended that for design close to active faults, the strength-reduction factors for all components of motion should be constant for all periods and equal to (2mÀ1) 1/2 , where m is ductility.