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武汉火车站支撑结构东西向长度为258m(屋盖长度约300m),南北向长度为476m,南北向超长。对武汉站采用时程分析法,进行了考虑行波效应的多点输入地震反应分析。对多点输入与单点输入情况下的基底总剪力、扭转效应以及重要构件内力均进行了比较,讨论了不同视波速度对分析结果的影响。针对不同类型构件,给出了考虑多点输入影响的地震作用效应调整系数,并对这些构件进行了在多点输入地震组合工况下的截面验算,计算结果表明全部构件均满足规范要求,不必要因多点输入而采取特殊的构造措施。
Wuhan Railway Station support structure east-west length of 258m (roof length of about 300m), north-south length of 476m, long north-south. Using the time history analysis method for Wuhan station, multi-point seismic response analysis considering traveling wave effect is carried out. The total substrate shear force, torsional effect and the internal force of the important components under multi-input and single-point input were compared. The influence of different wave velocity on the analysis results was discussed. For different types of components, the adjustment coefficient of seismic effect considering the influence of multi-point input is given, and the cross-section checking of these components under multi-point input seismic conditions is carried out. The calculation results show that all the components meet the requirements of the specification, Due to multi-point input and take special construction measures.