新型高速铁路客站多维抗震分析的实用反应谱法

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (1) : 113-117.

论文

新型高速铁路客站多维抗震分析的实用反应谱法

徐汉勇 ,2，余志武1,2

作者信息 +

A Practical Response Spectrum Method to Study the Behavior of a Novel High Speed Railway Station under Multiple Earthquake Excitation

XU Han-yong1,2, YU Zhi-wu1,2

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文章历史 +

摘要

针对“房桥合一”高速铁路客站不同阻尼比构件、大跨构件较多，对其阻尼模型和多维实用反应谱法进行了研究。首先通过位能加权阻尼和振型分解法的原理，得出位能加权阻尼的激励为各振型响应，并基于单元刚度矩阵推导了位能计算公式。接着在结构自振周期不超过4.5倍场地特征周期的条件下，对水平与竖向加速度互功率谱的表达形式进行了替代。基于两者，利用随机振动理论与反应谱理论推导了能合理考虑各向振型间相关性的实用反应谱公式。最后，以天津西站II区为例加以应用，并与时程分析、多种常用多维反应谱组合法进行了比较，说明该公式的合理性，可供同类结构抗震设计与分析作参考。

Abstract

A high speed railway station, integrated structure-bridge, was a complex structure, with members having different damping ratio, and with large-span members, so the study about the damping model and practical response spectrum method was conducted. Firstly, based on the principle of damping method with potential energy weighted and modal decomposition, it was founded that the excitation of the damping method was the response of every modal and the calculation formula was proposed by using the elemental stiffness matrix. Secondly, a rational substitution of cross-power spectrum between X or Y-direction and Z-direction is proposed, when the natural period was no greater than 4.5 times characteristic site period. Then, a practical response spectrum formulation was proposed based on random vibration theory and response spectrum theory. Lastly, all the calculation formula were used in a typical case -Tianjin Railway Station-II, and some comparisons among the results from the formula, time-history and some used multidimensional combinations, were done, which proved the practical method could be a reference for the design and analysis of the same kind of structure under seismic excitation.

导出引用

徐汉勇 ;余志武;. 新型高速铁路客站多维抗震分析的实用反应谱法[J]. 振动与冲击, 2013, 32(1): 113-117

XU Han-yong;YU Zhi-wu;. A Practical Response Spectrum Method to Study the Behavior of a Novel High Speed Railway Station under Multiple Earthquake Excitation [J]. Journal of Vibration and Shock, 2013, 32(1): 113-117