有应力史差非匀质截面轴心受压杆的性能研究  

ANALYTICAL AND EXPERIMENTAL STUDIES ON AXIALLY COMPRESSED MEMBERS WITH NON-UNIFORM SECTION, NON-LINEAR MATERIAL AND STRESS HISTORICAL DIFFERENCE

作　　者：刘利先[1] 时旭东[1] 过镇海[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《力学与实践》2003年第3期38-41,共4页Mechanics in Engineering

基　　金：国家自然科学基金项目(59978022)资助

摘　　要：对有应力史差、非匀质、非线弹性的轴心受压构件进行了理论分析和试验研究,初步揭示了此类构件的受力特点.理论分析和试验表明:此类构件截面承载力不是各部分材料承载力的简单叠加;承载力和截面破坏控制点因截面上材料的本构关系的变化和应力史差而发生改变.Axially compressed members with non-uniform section, non-linear material and stress historical difference are studied theoretically and experimentally. The result shows that the ultimate load of a member is not equal to the summation of the respective ultimate loads of different parts on the section. Furthermore, the ultimate load and the failure location of the section vary with the stress-strain relations and initial stress differences of the materials on the section.

关 键 词：有应力史差 非匀质截面 轴心受压杆 初始应变 峰值应变差 材料力学 混凝土结构 

分 类 号：TU37[建筑科学—结构工程] TB301[一般工业技术—材料科学与工程]