Effects of Bearing Damage upon Seismic Behaviors of Multi-Span Simply Supported Bridges

다경간 단순형 교량구조물의 지진거동에 미치는 받침손상의 영향

  • 김상효 (연세대학교 사회환경시스템공학부) ;
  • 마호성 (호서대학교 토목공학과) ;
  • 조병철 (서영기술단)
  • Published : 2002.10.01


Dynamic responses of a multi-span simply supported bridge are investigated to examine the effect of bearing damage under seismic excitations. The damaged bearings are modeled as sliding elements with friction between the superstructure and the top of the pier. Various values of the friction coefficients are examined to figure out the effect of damaged bearings with various levels of peak ground accelerations. It is found that the global seismic behaviors are significantly influenced by the occurrence of bearing damage. It should be noticed that the most possible location of unseating failure of superstructures differs from that in the bridge model without considering the bearing damage. It can be concluded that the bearing damage may play the major role in the unseating failure of a bridge system, so that the damage of bearings should be included to achieve more rational seismic safety evaluation.


seismic excitation;bridge;bearing damage;sliding element;unseating failure


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