铁路悬索桥纵向非一致激励地震响应分析

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (22) : 157-163.

论文

铁路悬索桥纵向非一致激励地震响应分析

杨海洋1，钟铁毅1，夏禾1

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Seismic Responses Analysis of a Railway Suspension Bridge Under Longitudinal Non-Uniform Excitations

Yang Haiyang 1 Zhong Tieyi 1 Xia He 1

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文章历史 +

摘要

本文以某三跨铁路悬索桥为例，基于大型通用有限元软件ANSYS，采用行波输入与多点激励两种非一致地震激励，进行了铁路悬索桥的地震响应计算分析，研究得到了大跨度悬索桥在非一致激励输入下的响应变化规律，并通过分析桥梁各响应控制振型的变化，得到了非一致激励对桥梁地震响应的影响机理，从而揭示了两种非一致激励考虑方式对桥梁响应产生影响的根本区别，为悬索桥非一致激励下的地震响应计算分析提供了重要的参考和依据。

Abstract

Based on the general finite element software ANSYS, seismic responses under non-uniform excitations of a long-span railway suspension bridge are studied in this paper. Two different input methods, traveling seismic wave excitation and multi-support excitation, are used to analyze the seismic responses of the bridge, and then response regulations are discussed. By studying differences of the response control modes, the influence mechanisms of the non-uniform excitations are discussed, thus the fundamental differences between effects of the two input methods are revealed. These results can provide an important basis for the seismic analysis of the suspension bridge.

导出引用

杨海洋;钟铁毅;夏禾. 铁路悬索桥纵向非一致激励地震响应分析[J]. 振动与冲击, 2014, 33(22): 157-163

Yang Haiyang Zhong Tieyi Xia He . Seismic Responses Analysis of a Railway Suspension Bridge Under Longitudinal Non-Uniform Excitations[J]. Journal of Vibration and Shock, 2014, 33(22): 157-163