Seismic Performance Analysis and Evaluation of Half-through Railway Emergency Steel Girder
To evaluate the seismic performance of railway emergency steel girder under multi-dimen-sional seismic action,a 56 m-span half-through railway emergency steel girder was studied.The materi-al strain and support displacement were used as damage indexes by ANSYS finite element software to determine the index limits corresponding to each damage state.Through incremental dynamic analysis,10 groups of seismic actions were used as three-dimensional seismic input samples for the nonlinear dy-namic time-history analysis.The vulnerability of each component and the whole structure of the emer-gency steel girder was evaluated.The results show that the transverse stiffness of half-through railway emergency steel girder is lower than the vertical stiffness.The bearing is the most vulnerable component under the strong earthquake.The probability of serious damage to the whole structure is low.
万方数据
维普
