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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。
Based on the basic principle of traveling wave effect, forced displacement method is used to analyze the seismic response of long-span continuous rigid frame bridge in seismic longitudinal bridge. The results show that the traveling wave effect reduces the seismic response of continuous rigid frame bridge at certain wave velocities and increases the seismic response of continuous rigid frame bridge at other wave velocities, compared with the uniform excitation. When the apparent wave velocity is small The magnitude of change is significant. When the apparent wave velocity is large, the variation amplitude is small. With the increase of apparent wave velocity, the seismic response under the traveling wave gradually tends to the seismic response under uniform excitation. However, even if the apparent wave velocity is large enough, Anastomosis phenomenon.