Seismic Design of Non-Conventional Bridges (2019) / Chapter Skim
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Pages 26-27
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26 The sample size in the survey was limited by the concurrent conditions of non-conventional bridge design and moderate to high seismic regions of the United States. Project examples and project-specific criteria were consistent in approaching design practice using a well-established performance-based design process that has evolved from the time of ATC-32 and expanded in terms of definitions and details to strain-based criteria for assessing member and structure performance in earthquakes.
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From page 27... ...
Conclusions 27 basis. There is no guidance for factoring ground motions to address variance in the level of ground shaking assigned to the return periods selected for project criteria.
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