Practices and Procedures for Site-Specific Evaluations of Earthquake Ground Motions (2012) / Chapter Skim
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From page 17... ...
. The spectrum matching approach is gaining acceptance as the structural design is steadily moving away from a code Modification of time histories is required because the based response spectrum approach to a response spectrum initially selected time histories often differ from the design developed as a part of site response analysis.
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From page 18... ...
, significant debate remains soil response curves in the form of normalized modulus as to what depth could be used in site response analysis, what reduction and damping curves as a function of shear strain material/shear wave velocity needs should represent "com- that approximate the nonlinear hysteretic soil behavior. petent rock," and what type of design motion can be used at Figure 3 shows the hysteretic stress strain behavior of soils such depth (e.g., simulated motion, bedrock outcrop motion, under symmetrical cyclic loading by (1)
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