Effect of revised design earthquake ground motions considering zones factors on nonlinear response of steel bridge piers

S. Kitaichi, K. Ono, S. Okada

Research output: Contribution to conferencePaper

Abstract

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.

Original languageEnglish
Publication statusPublished - 2013
Event13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013 - Sapporo, Japan
Duration: 2013 Sep 112013 Sep 13

Other

Other13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013
CountryJapan
CitySapporo
Period13/9/1113/9/13

Keywords

  • Nonlinear response analysis
  • Steel bridge piers
  • Type I design earthquake ground motions
  • Zone factors

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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    Kitaichi, S., Ono, K., & Okada, S. (2013). Effect of revised design earthquake ground motions considering zones factors on nonlinear response of steel bridge piers. Paper presented at 13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013, Sapporo, Japan.