再生保温混凝土单轴受压随机损伤本构关系研究  

Study on Stochastic Damage Constitutive Law of Recycled Aggregate Thermal Insulation Concrete under Uniaxial Compression

作　　者：姜鲁[1] 刘元珍[1] 王文婧[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,太原030024

出　　处：《太原理工大学学报》2016年第5期628-633,共6页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目:玻化微珠保温砂浆劣化机理及对结构耐久性影响(51308371)

摘　　要：基于混凝土弹簧模型理论[8],并考虑到再生保温混凝土内部新水泥砂浆与旧水泥砂浆物理性能差异性,以及再生骨料本身的随机性,确立了各弹簧弹性模量之间的相对关系,分析了由不同原生强度再生骨料配制的再生保温混凝土的破坏模式以及破坏机理;建立了基于弹簧模型理论的再生保温混凝土单轴受压随机损伤细观模型;在细观弹簧模型的基础上,推导出再生保温混凝土单轴受压随机损伤本构方程。根据模型计算得到的应力-应变曲线与试验实测曲线符合度较好。On the basis of the theory of spring model for concrete and the difference in physical properties between the new and old cement mortars,as well as the randomness of the recycled coarse aggregates（RCA）,inside the recycled aggregate thermal insulation concrete（RATIC）,and the relative relationship between elastic modulus of springs in spring model,the failure mode and failure mechanism of RATIC made of RCA with different original strength were analyzed.Stochastic damage mesoscopic model for RATIC under uniaxial compression based on the theory of spring model was built.The stochastic damage constitutive equation for RATIC under uniaxial compression was deduced,and the stress-stain curves calculated based on the mesoscopic spring model fit well with measured ones.

关 键 词：再生保温混凝土 弹簧模型 随机损伤 原生强度 本构方程 

分 类 号：TU37[建筑科学—结构工程]