高速铁路客站抗震性能分析的实用虚拟激励法

发布时间：2018-07-31 11:21

【摘要】：针对高速铁路客站具有跨度大、节点多、单元多、构件阻尼比差异大等特点,提出实用多维虚拟激励法,从理论上阐明了振型阻尼法求解原理和方法。任取振型,采用修正过滤白噪声谱,利用反应谱能合理考虑激励非平稳性的优点,根据单自由度平稳激励虚拟激励法求得的位移均方差与位移反应谱值相等的原则确定各振型对应的功率谱强度因子。利用多维激励矩阵分解和振型分解原理,提出实用多维虚拟激励法,并以天津西站II区为例将上述理论和方法加以应用。经比较表明:计算结果较常用反应谱组合值大,较时程响应值小,证明该计算方法合理,可供复杂结构的抗震设计与分析参考。
[Abstract]:In view of the characteristics of high speed railway passenger station with large span, more nodes, more units and large difference of damping ratio of components, a practical multidimensional virtual excitation method is proposed, and the principle and method of solving vibration mode damping method are expounded theoretically. The advantages of excitation nonstationarity can be reasonably considered by using the modified filter white noise spectrum and the response spectrum. According to the principle that the displacement mean square deviation is equal to the displacement response spectrum value, the power spectral intensity factor corresponding to each vibration mode is determined according to the principle of single degree of freedom stationary excitation virtual excitation method. Based on the principles of multi-dimensional excitation matrix decomposition and mode type decomposition, a practical multi-dimensional virtual excitation method is proposed, and the above theory and method are applied to the area II of Tianjin West Railway Station as an example. The comparison shows that the calculated results are larger than the commonly used response spectrum combination values and smaller than the time-history response values. It is proved that the calculation method is reasonable and can be used as a reference for seismic design and analysis of complex structures.
【作者单位】：中南大学土木工程学院;高速铁路建造技术国家工程实验室;
【基金】：国家自然科学基金(50938008/E0805) 2012年湖南省研究生科研创新项目(CX2012B058) 2012年青年教师助推专项(2012QNZT054)
【分类号】：TU352.11

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