STUDY ON ADDITIONAL MASS TO THE CABLE-STAYED BRIDGE AS A COUNTERMEASURE AGAINST GREAT EARTHQUAKE

DOI Web Site 2 References
  • INOUE Koichi
    社団法人土木学会 三菱重工業 (株) 広島研究所鉄構・土木研究室
  • SUGIMOTO Hiroyuki
    社団法人土木学会 北海学園大学工学部土木工学科
  • MORISHITA Kunihiro
    社団法人土木学会 三菱重工業 (株) 広島研究所鉄構・土木研究室
  • YAMAMOTO Toshihiro
    社団法人土木学会 リョーセンエンジニアズ (株) 技術計算センター
  • FURUKAWA Kohei
    社団法人土木学会 山口大学工学部社会建設工学科

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Other Title
  • ケーブルへの質量付加による斜張橋主塔の大地震対策に関する研究

Abstract

Though it is necessary even for already constructed bridges to improve their antiseismic property according to the Specifications for Highway Bridges 1996, there are many cases in which reinforcement is almost impossible. The tower of cable-stayed bridge responds to transverse great earthquake is one of such cases.<br>In this study, we made an attempt to reduce the response of tower by means of additional mass to the cables, which changed the interaction among girder, tower and cables. Because there were innumerable combinations of additional mass distributed to the cables, the best decision was made by some optimization techniques. Some numerical examples showed that the response could be reduced to sufficient level.

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