方形截面深水桥墩的地震响应分析方法研究
发布时间：2018-10-21 12:27
【摘要】：为验证地震响应分析方法对方形截面深水桥墩的适用性,以边长为2m、高度为60m的正方形截面桥墩为例,分别采用解析法、数值法、结合法分析其在不同水深情况下的墩顶位移和墩底应力,并在此基础上对比方形截面和圆形截面桥墩地震响应的特点。结果表明:采用解析法按刚体运动计算方形截面桥墩的地震响应时,一定程度上夸大了动水压力的影响;采用数值法按弹性振动计算方形截面桥墩的地震响应时,水深增加的作用效果恰好与按刚体运动计算时相反,减小了桥墩的地震响应;采用结合法同时考虑地震作用下桥墩的刚体位移和弹性振动时,计算方形截面桥墩的地震响应更合理;方形截面桥墩与圆形截面桥墩的地震响应随水深的变化趋势类似。
[Abstract]:In order to verify the applicability of seismic response analysis method to square cross-section deep water pier, the square section pier with 2 m side length and 60 m height is taken as an example. The analytical method and numerical method are used respectively. The displacement of the pier top and the stress at the bottom of the pier under different water depths are analyzed by combining the method, and the characteristics of seismic response of square section and circular section pier are compared. The results show that the effect of dynamic water pressure is exaggerated to some extent when the seismic response of square section pier is calculated by using the analytical method according to rigid body motion, and the seismic response of square section pier is calculated by numerical method according to elastic vibration. The effect of increasing water depth is exactly opposite to that calculated by rigid body motion, which reduces the seismic response of bridge pier, and considers the rigid body displacement and elastic vibration of bridge pier under seismic action simultaneously by the combined method. The seismic response of square section pier is more reasonable, and the seismic response of square section pier and circular section pier is similar with the change of water depth.
【作者单位】： 西南交通大学土木工程学院;
【基金】：国家自然科学基金项目(51178397)~~
【分类号】：U442.55
，
本文编号：2285088
[Abstract]:In order to verify the applicability of seismic response analysis method to square cross-section deep water pier, the square section pier with 2 m side length and 60 m height is taken as an example. The analytical method and numerical method are used respectively. The displacement of the pier top and the stress at the bottom of the pier under different water depths are analyzed by combining the method, and the characteristics of seismic response of square section and circular section pier are compared. The results show that the effect of dynamic water pressure is exaggerated to some extent when the seismic response of square section pier is calculated by using the analytical method according to rigid body motion, and the seismic response of square section pier is calculated by numerical method according to elastic vibration. The effect of increasing water depth is exactly opposite to that calculated by rigid body motion, which reduces the seismic response of bridge pier, and considers the rigid body displacement and elastic vibration of bridge pier under seismic action simultaneously by the combined method. The seismic response of square section pier is more reasonable, and the seismic response of square section pier and circular section pier is similar with the change of water depth.
【作者单位】： 西南交通大学土木工程学院;
【基金】：国家自然科学基金项目(51178397)~~
【分类号】：U442.55
，
本文编号：2285088
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