荻港大跨越群桩土非线性有限元接触分析  

FEM-based nonlinear contact analysis of pile-group soil in Digang Large-span Project

作　　者：罗玉龙[1] 彭华[1] 游春华[2] 汤正阳[3] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072 [2]湖南工学院建筑工程系,湖南衡阳421008 [3]中国长江电力股份有限公司,湖北宜昌443002

出　　处：《武汉大学学报（工学版）》2007年第1期87-90,119,共5页Engineering Journal of Wuhan University

摘　　要：利用大型有限元分析程序ANSYS9.0,对±1 000 kV直流输电工程荻港跨越群桩、土相互作用机制进行分析.为避免群桩、土接触分析收敛困难,做了有益的简化,即将群桩和土首先在不考虑接触的情况下,进行静力计算,从中得到各种工况下受力最大的桩,然后单独对该桩与土进行非线性有限元接触分析.计算结果表明,该分析方法可行、有效,为处理大跨越一类工程问题提供了有益的借鉴,同时,此分析成果也为荻港大跨越工程的设计施工提供了重要的理论依据.The finite element analysis program ANSYS 9.0 is used to analyze the mechanism of the pile- group soil interaction in ±1000 kV DC transmission Digang Large-span Project. To avoid causing convergence problem of pile-group soil contact analysis, a useful simplification is made. That is, firstly, not considering the contact effect between pile-group and soil, static analysis is carried out; and the pile whose axial stress is the biggest in every load case is found; then the single pile-soil nonlinear contact interaction analysis is executed by FEM. The results indicate that this method is feasible and effective;and it provides helpful references for dealing with the same kind of large-span project; at the same time, these results also provide an important theoretical basis for the design of Digang Large-span Project.

关 键 词：大跨越工程 混凝土灌注桩 桩土相互作用 接触分析 ANSYS 

分 类 号：TU473[建筑科学—结构工程]