In 2012, Level 2 Earthquake Ground Motions (Type I) and 'modification factor for zones (zone factor)' in the seismic design specifications for highway bridges in Japan were revised. Design earthquake ground motions should be multiplied by zone factors to evaluate the seismic performance. Regarding one of zones, Type I design earthquake ground motions are remarkably changed from the former earthquake ground motions multiplied by "0.85" to the revised ones multiplied by "1.2". The purpose of this paper is to investigate the effect of design earthquake ground motions considering zone factors on nonlinear response of steel bridge piers. The time-history dynamic analysis on the single-degree-of-freedom system was adopted in order to identify whether the bridges have enough seismic performance. Comparing obtained maximum response displacements of two kinds of earthquake ground motions (Type I and Type II), this paper came to conclusions. The results revealed that, regarding some zones, the Type I design earthquake ground motions have generally caused larger maximum response displacement than that of Type II.
|出版ステータス||Published - 2013|
|イベント||13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013 - Sapporo, Japan|
継続期間: 2013 9月 11 → 2013 9月 13
|Other||13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013|
|Period||13/9/11 → 13/9/13|
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