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- Title
Seismic Response Analysis of Isolated Continuous Girder Beam Bridge Based on Energy Method.
- Authors
PENG Ganghui; YAO Guowen; JIA Hongyu; ZHENG Shixiong; LI Shiya
- Abstract
In order to study the influence of seismic wave, fundamental period of bridge structure and damping model on input energy of seismic, damping energy and hysteresis energy, four working conditions are established according to different height of the pier based on the seismic energy method with reference to the lead rubber bearing isolated continuous girder beam bridge, and three damping models are used for the calculation of damping. According to the ratio of seismic wave peak velocity (PGV) to peak acceleration (PGA), six seismic waves are selected from PEER. The numerical mechanics model is established by using finite element software, and seismic response analysis of nonlinear dynamic time history is carried out. Study results are obtained as follows: the value of /PGV/PGA/ of seismic wave has a great influence on input energy, damping energy and hysteresis energy; the fundamental period of bridge structure has a little influence on input energy, but certain influence on damping and hysteresis energy; the hysteresis energy of isolation bearings of bridge structure with lower fundamental period is more obvious; the damping model has a little influence on seismic input energy, but great influence on damping and hysteresis energy. Therefore, the calculation of damping with Rayleigh damping is more conducive to protect piers when the energy method is used for seismic analysis of isolated continuous girder beam bridge; and seismic wave should not be selected randomly, but selected according to the type of site and the seismic fortification intensity.
- Publication
Railway Standard Design, 2023, Vol 67, Issue 9, p89
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202203260004