桩-沙土相互作用地震分析研究

英文篇名：Study on Pile-sand Interaction under Seismic Vibration
中文刊名：佳木斯大学学报(自然科学版)
英文刊名：Journal of Jiamusi University(Natural Science Edition)
作者：马东亚 ; 曾大明 ; 赵扬
英文作者：MA Dong-ya1 ; ZENG Da-ming2 ; ZHAO Yang 3(1.Institute of Structure Engineering and Disaster Reduction ; Tongji Univ ; Shanghai 200092 ; China ; 2.Haisum ; Shanghai 200031 ; China ; 3.Johnson-Cadg ; Shanghai 200120 ; China)
中文关键词：沙土液化 ; 孔隙水压力 ; 桩-沙土相互作用
英文关键词：sand liquefaction ; pore water pressure ; pile-soil interaction
出版日期：2012-11-15
机构：同济大学结构工程与防灾研究所;中国海诚工程科技有限公司;上海市中森建筑与工程设计顾问有限公司;
年：2012
期：06
出版单位：佳木斯大学学报(自然科学版)

摘要

沙土强震后场地液化会产生重大的灾害,在历次地震中已有所呈现.利用Opensees程序对单桩在沙土中的地震反应进行计算分析,模型土中,顶部2m为粘土,以下10m为沙土,利用集中质量模拟上部结构,El Centro和正弦波作为模拟地震动输入.计算结果显示:沙土在强震下的孔隙水压力和液化规律与地震波的类型有关,液化后桩身位移和弯矩迅速增大,桩的承载能力下降,表明液化后上部结构可能破坏.
Some serious damages were presented as sand liquefaction under strong earthquake in previous years.Single pile with concentrated mass on the top loaded by seismic vibration was simulated by Opensees program.2m below the surface is clay while 10m below the clay is sand for the model.El Centro and sine wave were inputted as seismic vibration.The results show that the types of earthquake have effect on pore water pressure and liquefaction.The amplitude of displacement and bending moment increase heavily,which may cause the bearing capacity degenerated owing to the sand liquefaction.

引文

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