地震条件下抗滑桩有限杆单元时程法与离心机模型试验研究  

Centrifuge Model Test Study of Anti-slide Pile Seismic Response and Finite Rod Elements Time-history Method

作　　者：金亚兵 孙勇[2] 徐晶鑫 JIN Yabing;SUN Yong;XU Jingxin(Shenzhen Geology Bureau,Guangdong 518023,China;Karst Key Laboratory of Environmental and Geological Disasters,Guizhou University,Guiyang 550025,China)

机构地区：[1]深圳市地质局,广东深圳518023 [2]贵州大学喀斯特地质资源与环境教育部重点实验室,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2021年第3期98-105,共8页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金资助项目(51168009);贵州优秀教育人才省长基础资助项目(黔省专合字2016-35)。

摘　　要：地震条件下抗滑桩计算主要是基于岩土体动力应力应变关系的数值法和拟静力法,前者误差很大,后者不能考虑地震的时程作用。采用弹性地基梁理论、有限杆单元法(矩阵位移法)理论、多质点有阻尼体系动力反应的振型叠加法理论和Reyleigh阻尼理论,提出一种抗滑桩计算方法,用于地震条件下抗滑桩时程法分析计算,并给出了地基系数的比例系数的计算公式。最后,在浙江大学ZJU-400土工振动离心机上进行了模型试验,实测值与计算值相吻合,验证了方法的正确性。该方法为地震条件下抗滑桩时程法提供了一种有效的计算方法,对工程实践具有一定的应用前景。At present,the calculation of anti-slide piles under earthquake conditions is mainly based on the numerical method of dynamic stress-strain relationship of rock and soil and quasi-static method.The former has a large error,and the latter cannot consider the time-history effect of the earthquake.The anti-slide pile calculation method proposed in this paper adopts the theory of elastic foundation beam,finite pole element method(matrix displacement method),the mode superposition method theory of multi-mass damping system dynamic response,Reyleigh damping theory,it is used for time-history analysis and calculation of anti-slide piles under seismic conditions.This paper proposes a formula for calculating the proportional coefficient of the foundation coefficient.In order to verify the correctness of the method,a model test was carried out on the ZJU-400 geo-vibration centrifuge of Zhejiang University.The results are in agreement with the theoretical value calculated in this paper.This paper provides a set of effective methods for the calculation of anti-slide pile time-course method under earthquake conditions,and has broad application prospects for engineering practice.

关 键 词：地震作用 抗滑桩 动力地基系数法 有限杆单元法 

分 类 号：TU473.1[建筑科学—结构工程]