Observation and analytical verification on seismic responses of a long span cantilever truss bridge

DOI
  • Kanaji Hidesada
    （財）阪神高速道路管理技術センター　技術部開発研究課
  • Suzuki Naoto
    （株）建設技術研究所　大阪支社

Bibliographic Information

Other Title
  • 長大カンチレバートラス橋の地震応答に関する観測結果と解析的検証

Description

Described in this paper are an observation and analytical verification on seismic responses of a long-span cantilever truss bridge with 980m-long. Some earthquake records have been obtained from this bridge and dynamic analyses were carried out in order to verify the natural frequencies and damping properties. It was found that natural frequencies of analyses using the three-dimensional model are good agreement with those of observations. However it can be noted the damping ratio which is normally applied in analyses may give small displacement response for the relatively long period mode. Therefore we recommend that 1% of damping ratio should be applied for such the mode. Moreover it was confirmed that the friction between I-bar and a pin at hinge portions of cantilever bridge affect the bridge response in the longitudinal direction.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390282680259502720
  • NII Article ID
    130004503473
  • DOI
    10.11532/structcivil.53a.277
  • ISSN
    1881820X
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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