桁衝突解析による橋梁の地震被害分析  [in Japanese] DAMAGE ANALYSIS OF A BRIDGE AFFECTED BY THE CHI-CHI EARTHQUAKE  [in Japanese]

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Author(s)

Abstract

1999年の台湾集集地震で被災した橋梁の中から, 地表面に不均一な地盤の割れや移動が確認されていないにもかかわらず, 2つの桁が落橋した長庚大橋を対象に, 被害分析を実施した. 地震後に実施した被害調査や現地測量, 現地の橋梁管理者から入手した詳細図面をもとに非線形動的解析を行った結果, 本橋は地震時に桁同士が玉付き衝突を起こし, 桁が橋台パラペットにめり込み, 落橋に至った可能性が高いことを明らかにした.

Seismic damage analysis was conducted on the Chang-Geng Bridge damaged in the 1999 Chi-Chi Earthquake in Taiwan. This bridge sustained peculiar damage that two girders fell to the ground even though the ground did not show any fault displacement. The cause of the fall was assumed to be the horizontal displacement of the girders when they collided under seismic loading. Through nonlinear dynamic analysis using field measurement results and detailed drawings obtained from the administrator of the bridge, it was confirmed that the girders were pushed toward the parapet and collided from the back under seismic loading, resulting in the fall from the piers.

Journal

  • Doboku Gakkai Ronbunshu

    Doboku Gakkai Ronbunshu (794), 143-156, 2005-07-21

    Japan Society of Civil Engineers

References:  11

Codes

  • NII Article ID (NAID)
    10014351993
  • NII NACSIS-CAT ID (NCID)
    AN10014020
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    02897806
  • NDL Article ID
    7426496
  • NDL Source Classification
    ZN1(科学技術--建設工学・建設業)
  • NDL Call No.
    Z16-6
  • Data Source
    CJP  NDL  J-STAGE 
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