纵桥向行波作用下大跨度连续刚构桥的地震反应分析

发布时间：2018-02-28 23:09

本文关键词： 桥梁工程大跨度连续刚构桥地震反应分析行波效应　出处：《中外公路》2014年06期 　论文类型：期刊论文

【摘要】：基于行波效应的基本原理,采用强迫位移法分析了大跨度连续刚构桥在地震动纵桥向的地震反应。结果表明:与一致激励相比,行波效应在某些波速下会减小连续刚构桥的地震反应,而在另一些波速下会增大连续刚构桥的地震反应;当视波速较小时变化幅度显著,当视波速较大时变化幅度较小,而且随着视波速的增加,行波作用下的地震反应逐渐趋向于一致激励下的地震反应,但即使视波速足够大仍会出现不吻合现象。
[Abstract]:The basic principle based on traveling wave effect, the forced displacement method to analyze the seismic response of Long Span Continuous Rigid Frame Bridge in the longitudinal direction of the bridge vibration. The results showed that compared with the uniform excitation, traveling wave effect can reduce the seismic response of continuous rigid frame bridge in some wave velocities, seismic response and in some wave velocities will increase the continuous rigid frame bridge; when the apparent velocity is small changes, when the smaller amplitude of apparent wave velocity is larger, and with the increase of the apparent velocity of seismic response seismic response of traveling wave gradually tend to under uniform excitation, but even if the velocity is large enough there will still be no consistent phenomenon.

【作者单位】：河南城建学院交通工程系;
【基金】：国家自然科学基金资助项目(编号:59979001)
【分类号】：U442.55;U448.23

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