参数变化对多元复合地基承载力发挥系数的影响  

Effect of Design Parameter Changes Upon Efficiency Factor of Bearing Capacity of Multi-element Composite Foundation

作　　者：王仙芝[1] 郑俊杰[2] 王龙飞[3] 

机构地区：[1]广东水利电力职业技术学院水利系,广州510635 [2]华中科技大学土木工程与力学学院,武汉430074 [3]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《武汉理工大学学报（交通科学与工程版）》2010年第2期427-430,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目资助(批准号:50478090)

摘　　要：结合室内模型试验和理论研究成果,考虑土的弹塑性和桩、土接触的高度非线性行为,建立了比较合理的多元复合地基数值模型;通过改变设计参数(主桩桩径、次桩桩径、次桩桩长、主桩模量、次桩模量、褥垫层厚度、褥垫层模量),对多元复合地基承载力发挥系数作了较系统的研究,得出了有利于多元复合地基工程设计及理论研究的一些结论.Based on the model tests and the results of theoretical research, considered elasto-plasticity of the soil and highly nonlinear behavior of contact with piles and soil, more reasonable numerical model on multi-element composite foundation was built. By changing the design parameters （the di- ameter of main pile, the diameter of auxiliarypile, the length of auxiliary pile, the modulus of main pile, the modulus of auxiliary pile, cushion thickness, the modulus of cushion）, efficiency factor of bearing capacity on multi-element composite foundation was to play a more systematic study. Some conclusions were drawn in favor of engineering design and theoretical study of multi-element compos- ite foundation.

关 键 词：多元复合地基 承载力发挥系数 设计参数 接触单元 褥垫层 

分 类 号：TU473[建筑科学—结构工程]