考虑波浪作用下的深水桥墩地震响应分析

发布时间：2018-05-21 04:33

本文选题：深水桥墩 + 地震响应　；参考：《土木工程与管理学报》2015年02期

【摘要】：跨海深水桥梁会受到地震和波浪的共同作用,研究地震和波浪共同作用下的深水桥梁动力响应问题具有非常重要的意义,并且该问题一直没有得到很好解决。本文以某典型深水桥墩为例,研究波浪作用对深水桥墩地震响应的影响。首先建立了考虑波浪作用下的深水桥墩地震响应分析方法,然后针对仅地震作用、仅波浪作用、同时考虑波浪作用下的地震作用3种情况对该桥墩进行动力响应分析。分析结果表明,动水压力增大了深水桥墩的地震响应,其影响程度与输入地震波的频谱特性有关;波浪响应值比地震响应值小;但考虑波浪作用前后的桥墩地震响应值变化较大,考虑地震作用下的深水桥墩地震响应不是两者独立作用下动力响应简单的叠加。
[Abstract]:Deep water bridges across the sea will be subjected to the interaction of earthquake and wave. It is very important to study the dynamic response of deep water bridges under the interaction of earthquake and wave, and the problem has not been solved well. In this paper, a typical deep water pier is taken as an example to study the effect of wave action on seismic response of deep water pier. First, the seismic response analysis method of deep water pier considering wave action is established, and then the dynamic response analysis of the pier is carried out for seismic action only, wave action only, and seismic action under wave action at the same time. The results show that the dynamic pressure increases the seismic response of the bridge pier in deep water, and the influence degree is related to the spectral characteristics of the input seismic wave, and the wave response value is smaller than the seismic response value. However, the seismic response of pier before and after the wave action varies greatly, and the seismic response of deep water pier under seismic action is not simple superposition of dynamic response under independent action of both.
【作者单位】：同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金(51278376;51478339) 土木工程防灾国家重点实验室基金(SLDRCE14-B-14)
【分类号】：U442.55

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