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  • Due to the need for site-specific analysis for site class F, the reduced design spectrum needs to be imported by user as a .txt fileshort-period and long-period site coefficient Fa and Fv are defined by user.

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Site response analysis have to be performed in accordance with Section 21.1 for structures on Site Class F sites, unless exempted in accordance with Section 20.3.1. A site response analysis in accordance with Section 21.1 and/or a ground motion hazard analysis in accordance with Section 21.2 could be performed to determine ground motions for any structure.11.4.8.

When short-period site coefficient Fa and long-period site coefficient for a period of 1.0 seconds are defined, horizontal elastic design acceleration spectrum corner periods To and Ts are calculated and the horizontal elastic design spectrum is created.

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11.9.2 Vertical Elastic Design Spectrum

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