基于向量式有限元的超高韧性水泥基复合材料叠合剪力墙非线性分析  

Nonlinear Analysis of UHTCC Composite Walls Based on Vector Form Intrinsic Finite Element Method

作　　者：刘松[1] 章红梅[1] 师振华[1] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《结构工程师》2015年第4期38-46,共9页Structural Engineers

基　　金：港澳台科技合作专项资助(2012DFH70130);国家自然科学基金(51578419);中央高校基本科研业务费专项资金

摘　　要：超高韧性水泥基复合材料(UHTCC)具有抗拉性能好、裂缝宽度可控、耐久性强以及受拉应变硬化特征等优点,克服了传统水泥基复合材料的易开裂破坏的缺点,适合于受拉混凝土构件或裂缝要求高的混凝土构件。剪力墙是一种抗震性能良好的结构构件,但其边缘为拉压破坏的易损区域,采用超高韧性混凝土材料替换传统混凝土可望获得更优异的抗震性能。基于求解结构非线性行为的向量式有限元(VFIFE)方法,采用自开发程序模拟分析超高韧性水泥基复合材料剪力墙拟静力推覆全过程。模拟结果表明,超高韧性水泥基复合材料具有优异的抗拉性能及韧性性能,可以有效改善剪力墙开裂后的工作性能,从而提高构件的抗震性能,因此具有重要的工程应用价值。Ultra high toughness cementitious composite （UHTCC）has good tensile property,crack width control property, strong durability, tensile strain hardening and other advantages and overcomes the disadvantages that traditional cementitious composite material is easy to crack,is suitable for the tensile concrete members or high crack control concrete members.Shear wall is a good seismic performance structures,while its edges are vulnerable area of tensile and compressive failure.Using ultra high toughness cementitious composite to replace the traditional concrete can obtain more excellent seismic performance.In this paper,based on the vector form intrinsic finite element（VFIFE）method for solving nonlinear behavior of structures,the whole process of the UHTCC shear walls′are simulated by the self-development programs.The simulation results show that,the ultra-high toughness cementitious composite shear walls has excellent seismic performance and toughness,improves the ductility and lateral bearing capacity of shear walls significantly, which has important application value in engineering.

关 键 词：钢筋混凝土剪力墙 超高韧性水泥基复合材料(UHTCC) 应变硬化 向量式有限元(VFIFE) 非线性分析 

分 类 号：TU398.2[建筑科学—结构工程]