一种膨胀土湿度应力场的近似计算方法  

An approximation for calculating moisture stress field of expansive soil

作　　者：申权[1] 杨果林[1] 房以河[1] 杨天尧 何旭[1,2] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中铁十九局集团有限公司,辽宁辽阳111000

出　　处：《深圳大学学报（理工版）》2016年第1期41-48,共8页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(51278499;51308551;51478484);中央高校基本科研业务专项资金资助(2015zzts059)~~

摘　　要：构建一种数值与试验相结合的计算湿度应力场的方法,根据湿度应力场与温度应力场的相似性,采用FLAC软件温度应力场模拟原位竖向膨胀力试验,由此确定湿度场线膨胀系数.利用室内模型试验对该模拟结果的准确性进行验证,室内模型试验和数值模拟得到的竖向膨胀力大小接近,规律基本一致,表明此种近似的膨胀土湿度应力场计算方法有效可行.研究可为膨胀土膨胀特性的数值模拟提供借鉴.An approximate approach to calculate moisture stress field of expansive soil is put forth based on numerical calculation and experiments. According to the similarity between the temperature stress field and humidity stress field,in-situ test of vertical expansion force is simulated by a FLAC simulated temperature stress field,aiming at determining expansive factors of a moisture stress field. Indoor model tests are used to verify the correctness of numerical analysis results. The vertical expensive forces determined by numerical simulation are close to the indoor model test results. The results show that the proposed calculation method of expansive soil moisture stress field is feasible and effective. Research results could serve for numerical analysis on the swelling characteristic of expansive soil.

关 键 词：组合结构 膨胀土 湿度应力场 温度应力场 原位竖向膨胀力试验 室内模型试验 

分 类 号：TU398[建筑科学—结构工程]