Ultimate states for thin-walled stiffened steel bridge piers of continuous elevated highway bridges subjected to bi-directional horizontal seismic forces and bi-directional seismic moments

• Goto Yoshiaki

  名古屋工業大学大学院　社会工学専攻

• Ebisawa Takemasa

  名古屋工業大学大学院　社会工学専攻

• Ishikawa Jumpei

  新日鉄エンジニアリング株式会社

Bibliographic Information

Other Title

• ２方向水平力と２軸曲げを受ける鋼製橋脚の限界状態と連続高架橋の耐震安全性の検討

Abstract

For safety check of steel bridge piers in elevated girder bridges under the coupling of bi-directional horizontal seismic accelerations, an interaction surface is derived to specify the ultimate state of bridge piers. Considering the realistic conditions of girders supported by bearings at the top of piers, this ultimate interaction surface is derived in terms of bi-directional horizontal forces and bi-directional bending moments acting at the top of the piers. In the derivation of the interaction surface, bending moment components are converted to equivalent horizontal force components by introducing the concept of effective height. The accuracy and validity of the ultimate interaction surface is examined by numerical analysis when applied to the four piers that support a conventional 3-span continuous girder bridge subjected to bi-directional seismic accelerations. As a result, it is observed that the proposed ultimate interaction surface is reasonably accurate. However, it is a little conservative to check the overall instability of the bridge system by using of the ultimate interaction surfaces of the respective piers.

Journal

• Journal of Structural Engineering, A

  Journal of Structural Engineering, A 57A 490-499, 2011

  Japan Society of Civil Engineers

Keywords

• steel bridge pier
• elevated bridge
• bi-directional moments
• bi-directional excitation
• seismic design

Details

• CRID: 1390001205284724096
• NII Article ID: 130004503744
• DOI: 10.11532/structcivil.57a.490
• ISSN: 1881820X
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed