有限元计算中土的变形模量取值探讨  

The Value of Soil Deformation Modulus in the Finite Element Calculation

作　　者：江小兵 张浩博[2] 

机构地区：[1]中国有色金属工业西安勘察设计研究院,陕西西安710054 [2]西安理工大学土木建筑工程学院,陕西西安710048

出　　处：《水利与建筑工程学报》2017年第5期236-240,共5页Journal of Water Resources and Architectural Engineering

摘　　要：为修正均匀介质的弹性理论计算变形模量的误差,使用ANSYS软件建立两种有限元计算模型,一种模型为完全均质地基模型,即与Boussinesq、Mindlin弹性理论相吻合的计算模型,另一种为荷载作用在刚性压板上的浅、深层平板载荷试验模型。然后根据具体算例进行对比分析,探讨有限元计算中土的变形模量取值。分析结果认为:在有限元或以弹性理论为基础的地基变形计算中,以浅层平板载荷试验计算得出的变形模量值,应再乘以1.079~1.157的系数计算土的变形模量;以深层平板载荷试验计算得出的变形模量值,应再乘以1.389~1.409的系数计算土的变形模量。In order to correct the error of calculating deformation modulus on the elastic theory of uniform medium,in this paper,two kinds of finite element calculation model is developed by using ANSYS software,one model for fully homogeneous foundation model,which is consistent with Boussinesq and Mindlin elastic theory; another is calculation model,a shallow and deep plate load test model,in which the load is applied to the rigid pressure plate.Then according to the specific example,the deformation modulus of soil is discussed in finite element calculation by comparison and analysis,the conclusions are that in the calculation of foundation deformation based on finite element or elastic theory,the deformation modulus are calculated by shallow plate load test,should be multiplied by1. 079 ~ 1. 157 coefficient; the deformation modulus are calculated by deep plate load test,should be multiplied by1. 389 ~ 1. 409 coefficient.

关 键 词：Boussinesq、Mindlin弹性理论位移解 浅、深层平板载荷试验 变形模量 有限元计算 

分 类 号：TU443[建筑科学—岩土工程]