钢筋增强ECC/混凝土组合节点抗震性能分析  

Numerical Study on Seismic Behavior of Steel Reinforced ECC/Concrete Composite Joint

作　　者：尹万云 潘金龙[2] 刘守城 袁方[2] 

机构地区：[1]中国十七冶集团有限公司,安徽马鞍山243000 [2]东南大学混凝土及预应力混凝土教育部重点实验室,江苏南京210096

出　　处：《江苏建筑》2014年第6期9-12,共4页Jiangsu Construction

基　　金：国家自然科学基金(51278118)

摘　　要：ECC(Engineered cementitious composite)是具有拉伸应变硬化特性和多裂缝开展机制的一种高延性纤维增强水泥基复合材料。文章基于ECC材料在往复荷载作用下的试验结果,编制了ECC材料在往复荷载作用下的简化本构模型程序,并且基于纤维模型对钢筋增强ECC/混凝土组合节点在往复荷载作用下受力性能进行了数值模拟。模拟结果与试验结构吻合良好,所采用的ECC材料本构模型能够较为准确地模拟组合节点在往复荷载作用下的性能指标,如承载力、残余变形和耗能能力等。Engineered cementitious composite （ECC） is a class of fiber reinforced cement-based composite material that has the properties of tensile strain hardening and multiple cracking mechanism. In this paper, a simplified constitutive model of ECC material was also proposed and coded based on the results of the reversed cyclic uniaxial test. The steel reinforced ECC/concrete composite joint under reversed cyclic loading was analyzed based on a fiber model program. The agreement between calculated and measured results indicates behaviors of steel reinforced ECC/concrete composite joint, such as load-carrying capacity, residual deformation, and ener~ dissipation capacity, etc.

关 键 词：高延性纤维增强水泥基复合材料 往复荷载 纤维模型 数值模拟 

分 类 号：TU313.3[建筑科学—结构工程]