摘要
结合 1 8根立方体抗压强度为 1 0 0～ 1 5 0 MPa的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 beh av ior of eighteen high strength reinforced concrete restrained beams with web rein forcem ent,with the compression strength ranging from 100 MPa to 150 MPa,the nonlinear finite element analysis procedure was formulated and analysis of the specimens w ere carried out with the parameters obtained from the experiments and improved c onstitutive laws and failure criteria of materials.The shear resistance test res ult of eighteen high strength concrete restrained beam under point load was give n by using many physical mechanical performance parameter of high strength concr ete.The reclusive equation to compute the shear capacity of such beams was obtai ned.The analytical results agree well with that of experiments.
