Expansive soil-structure interaction and its sensitive analysis

作     者：肖宏彬 张春顺 何杰 范臻辉 

作者机构：Institute of Geotechnical EngineeringHunan University of Technology School of Civil and Architectural Engineering Central South University Changsha 410075 China School of Civil and Architectural Engineering Central South University 

出 版 物：《Journal of Central South University of Technology》 (中南工业大学学报（英文版）)

年 卷 期：2007年第14卷第3期

页      面：425-430页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 081402[工学-结构工程] 0815[工学-水利工程] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0813[工学-建筑学] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Projects(50378097 50678177) supported by the National Natural Science Foundation of China Project (01JJY3043) supported by the Natural Science Foundation of Hunan Province, China 

主　　题：扩张性土壤 分界面 直接剪切摩擦测试 最终剪切应力 残留剪切应力 

摘      要：Several groups of direct shear tests of Nanning expansive soil samples were carried out by improved direct shear apparatus. The results of the characteristics of the ultimate shear stress and residual shear stress at the interface of expansive soil-structure are presented as follows: linear relation can approximately reflect changes between the both shear stress and the three factors: vertical load, water content and dry density, just different degrees from each other; increasing the vertical load from 25 kPa to 100 kPa (up by 300%) can cause the average increase of ultimate shear stress from 58% (for samples with 1.61 gcm3) to 80% (for samples with 1.76 gcm3), and an close average increase of 180% for the residual shear stress; increasing the water content from 14.1% to 20.8% (up by 47.5%) can cause the average decrease of the ultimate shear stress from 40% (for samples with 25 kPa) to 80% (for samples with 100 kPa), and the average decrease from 25% (for samples with 25 kPa) to 30% (for samples with 100 kPa) for the residual shear stress; increasing the dry density from 1.61 gcm3 to 1.76 gcm3 (up by 9.3%) can cause the average increase of ultimate shear stress from 92% (for samples with 25 kPa) to 138% (for samples with 100 kPa), and an average increase of 4% for the residual shear stress. Sensitive analysis was further made to explain reasons causing the differences of the both shear stress induced by the three factors.