摘要
通过研究现阶段砌体在剪-压复合作用下的多种破坏准则,以现行《砌体结构设计规范》GB50003—2001中的变系数剪摩理论为依据,对砖砌体分别采取分离式和整体式建模。在有限元软件ABAQUS中,利用接触黏性技术,建立考虑砂浆性能和砂浆与砖块之间的相互作用的三维有限元分离式模型;砌体近似看成是各向同性材料,用混凝土塑性损伤模型定义材料属性,建立了三维有限元整体式模型。在不同轴压比下对砖砌体的破坏形态进行了数值模拟,对其抗剪承载力进行了模拟计算。结果表明,有限元模型计算值与规范理论值吻合度较高,验证了该有限元模型与规范理论的一致性。
Through studying different failure criterions of masonry in compression-s-hear nowadays,based on variable coefficient shear friction theory of code for design of masonry structures,taking separate and integral model respectively. In the finite ele-ment software ABAQUS,applying contact adhesive technology,setting up three dim-ensional finite element separate model considering mortar property and cohesion and shear slip action between mortar and bricks; The masonry is as isotropic material,ma-terial properties are defined with concrete damaged plasticity model,three dimention-al finite element integral model is established. The damage form of brick masonry un-der axial pressure ratio are simulated,and shear bearing capacity is simulated calcula-tion. Results show that the alignment between calculation value of the finite element model and theory value of the code is higher,the finite element model is verified by conformance with the code theory.
出处
《施工技术》
CAS
北大核心
2015年第S2期588-592,共5页
Construction Technology
关键词
破坏准则
砌体
有限元模型
变系数剪摩理论
failure criterions
masonry
finite element model
variable coefficient shear friction theory
