襄阳东津站多点激励地震响应分析

Seismic response analysis of Xiangyang-Dongjin Railway Station under multi-support seismic excitation

襄阳东津站站房长度超过300m,属于超长结构。采用时程分析方法,利用ABAQUS软件对结构进行小震弹性和大震弹塑性多点激励与一致激励的对比分析,考察行波效应对结构的影响。分析结果表明,小震弹性阶段,考虑行波效应后结构角柱、边柱及斜撑内力有所加大;大震弹塑性分析阶段,考虑行波效应后结构损伤程度未见明显加重,仅个别构件损伤略微加大。分析结果为结构设计中考虑行波效应的影响提供了依据。

The length of station building of Xiangyang-Dongjin Railway Station is more than 300 m, which belongs to the super-long structure. Using time-history analysis method and ABAQUS software, a comparative analysis was made of elastic and elastoplastic multi-support seismic excitation and uniform excitation under frequent and rare earthquakes, and the influence of traveling wave effect on the structure was investigated. The results show that in the elastic stage under the frequent earthquake, the internal forces of corner columns, side columns and diagonal braces increase after considering the traveling wave effect;in the elastic-plastic analysis stage under the rare earthquake, the damage degree of the structure does not increase significantly after considering the traveling wave effect, but only the damage of individual components increases slightly. The analysis results provide a basis for considering the effect of traveling wave in the structural design.