刚性桩复合地基抗震计算的一种简化方法  

A Simplified Calculation Method for Seismic Response of Rigid Pile Composite Foundation

作　　者：李丰[1] 宋二祥[1] 

机构地区：[1]清华大学土木工程系清华大学土木工程安全与耐久教育部重点实验室,北京100084

出　　处：《西北地震学报》2011年第B08期123-127,共5页Northwestern Seismological Journal

基　　金：国家自然科学基金项目(50078030);北京市自然科学基金项目(8042013)

摘　　要：应用广泛的刚性桩复合地基目前其抗震设计还没有足够简便的计算方法,工程设计中对其抗震设计往往予以回避。本文首先介绍了笔者之前的一种对刚性桩复合地基进行抗震分析的拟静力方法,进而对其中有关上部结构惯性作用对桩身内力影响的计算部分进行了进一步简化,之后通过多种设计工况及实际土层条件下的计算对比,验证了改进方法的可行性。还对上部结构惯性作用的影响深度、地基分层对桩身内力的影响等进行了讨论。The seismic analysis for the rigid pile composite foundation which has been widely used in recent years is usually ignored in the stage of design because of the lack of practical analysis method.In this paper,a further simplified calculation method is proposed on the basis of the quasi-static calculation method put forward before by authors.In the proposed method the calculation of the pile internal force due to the inertia effect of the superstructure is further simplified. Engineering projects with different structural and soil conditions are calculated to demonstrate the validity of the method. Besides,the influence depth of the structure inertia effect and the influence of soil layering on the pile forces are also discussed.

关 键 词：刚性桩复合地基 抗震 简化方法 拟静力法 

分 类 号：TU473.1[建筑科学—结构工程]