基于损伤理论的混凝土双轴压本构模型  

Constitutive model of damage of concrete under biaxial compression

作　　者：商怀帅[1,2] 杨鲁生 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116023 [3]潍坊市市政工程建设处,山东潍坊261031

出　　处：《中南大学学报（自然科学版）》2013年第1期340-344,共5页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51208273);山东省高等学校科技计划项目(J12LG07);大连理工大学工业装备结构分析国家重点实验室研究基金资助项目(GZ1206)

摘　　要：对快速冻融循环作用后的普通混凝土进行双轴压试验研究,测得其双轴压应力-应变关系曲线。根据Weibull统计分布理论和等效应变假定原理,建立基于损伤理论并考虑应力比影响的普通混凝土双轴压本构模型。研究结果表明:该模型可以有效地描述双轴压荷载作用下普通混凝土的本构关系。The strength experiments of plain concrete after freeze-thaw cycles under biaxial compression were studied. The stress-strain relationship of specimens after freeze-thaw cycles was measured. On the basis of damage model of concrete under uniaxial compression, the constitutive model of damage was founded according to the Weibull distribution phenomenological method and equivalent strain hypothesis theory considering the stress ratio of concrete under biaxial compression. The results show that the given model can describe the mechanical capability of plain concrete under biaxial compression after freeze-thaw cycles.

关 键 词：混凝土 冻融循环 双轴压 损伤理论 本构模型 

分 类 号：TU375[建筑科学—结构工程]