超高强混凝土梁抗剪性能的有限元分析  

Finite Element Analysis of Shear Behavior of Super High Strength Reinforced Concrete Beam

作　　者：李立仁[1] 冯宏[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《重庆建筑大学学报》2006年第5期97-100,共4页Journal of Chongqing Jianzhu University

摘　　要：结合18根立方体抗压强度为100 MPa以上的超高强混凝土有腹筋约束梁在集中荷载作用下抗剪性能的试验研究,利用超高强混凝土的各种基本物理力学性能参数,以非线性有限元分析为基础,采用较为完善的非线性本构模型和破坏准则,编写了超高强混凝土有腹筋约束梁抗剪强度有限元分析程序以模拟试验。在非线性有限元分析模拟试验结果和已有试验实测数据的基础上,统计回归出了超高强混凝土有腹筋约束梁抗剪强度计算公式。应用该公式所得结果与试验结果符合较好。On the basis of testing results of shear behavior from 18 super high strength reinforced concrete restrained beams with web reinforcement, with the cube compressive strength ranging from over 100Mpa, in this paper, the nonlinear finite element analysis procedure was formulated and the analysis of the specimen tests was carried out with the parameters obtained from the experiments and improved constitutive model and failure criteria of materials. Based on the simulated shear resistance test results and practical measured data of eighteen super high strength concrete restrained beams under point load, the equation to compute the shear resistance capacity of such beams was thus obtained by regression. The analytical results agree well with those of experiments.

关 键 词：超高强混凝土 约束梁 抗剪强度 非线性有限元 

分 类 号：TU375.1[建筑科学—结构工程] TU317.1