多点激励下拱桥模型振动台试验及数值模拟研究

An Arch Bridge Model under Multi-Support Excitations——from Shaking Table Test and Numerical Simulations

对多点激励下大跨度桥梁的抗震性能研究,目前主要集中在理论和数值模拟方面,缺乏振动台试验数据的验证。本文通过对一座拱桥模型的多点激励振动台试验和相应的数值模拟分析,在一定程度上揭示了拱桥在一致激励、考虑行波效应和衰减效应的多点激励下的反应特点。同时,本文的数值模拟结果与试验结果也得到了较好的吻合。

At present, seismic behaviors of long-span bridges under multi-excitations are studied mainly by means of theoretical and numerical analysis, which is in lack of the proof from experimental data of shaking table tests. Based on a shaking table test of an arch bridge model and the corresponding numerical analysis, this paper disclosed some seismic response characteristics of the arch bridge under uniform excitations and multi-support excitations with consideration of traveling wave effect and attenuation effect. And the numerical results are basically accordant with the experimental data.