【摘要】：為驗證地震響應分析方法對方形截面深水橋墩的適用性,以邊長為2m、高度為60m的正方形截面橋墩為例,分別采用解析法、數(shù)值法、結合法分析其在不同水深情況下的墩頂位移和墩底應力,并在此基礎上對比方形截面和圓形截面橋墩地震響應的特點。結果表明:采用解析法按剛體運動計算方形截面橋墩的地震響應時,一定程度上夸大了動水壓力的影響;采用數(shù)值法按彈性振動計算方形截面橋墩的地震響應時,水深增加的作用效果恰好與按剛體運動計算時相反,減小了橋墩的地震響應;采用結合法同時考慮地震作用下橋墩的剛體位移和彈性振動時,計算方形截面橋墩的地震響應更合理;方形截面橋墩與圓形截面橋墩的地震響應隨水深的變化趨勢類似。
[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.
【作者單位】： 西南交通大學土木工程學院;
【基金】：國家自然科學基金項目(51178397)~~
【分類號】：U442.55
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本文編號：2285088