【摘要】 基于OpenSees平台,分别采用梁柱纤维单元和带塑性铰梁柱纤维单元建立了钢筋混凝土单柱的纤维模型和纤维铰模型,对循环荷载下的钢筋混凝土单柱非线性滞回反应进行了数值模拟。通过与试验结果的对比,验证了两种模型的模拟效果,并对模拟结果进行了分析讨论。研究表明,采用纤维模型可以较真实地模拟循环荷载下钢筋混凝土柱的非线性滞回性能,模拟结果能够较好地反映钢筋混凝土柱在反复加载过程中刚度和强度退化及捏拢现象,材料本构参数、积分点数目及纤维铰模型中的塑性铰长度对模拟效果有着重要的影响。更多还原

【Abstract】 Based on OpenSees procedure,the fiber model and fiber hinge model of RC column are built by using beam-column fiber element and beam with hinges fiber element respectively.The numerical simulation on nonlinear hysteretic response of RC column under cyclic loads is performed.According to the numerical results compared with experimental results,the effectiveness of simulation based on two different models is verified.Furthermore,the results of numerical simulation are discussed.The research indicates that the nonlinear hysteretic characteristics of RC column under cyclic loads can be veritably simulated by using fiber element model,the numerical simulation veritably reflected the stiffness and strength degradation and pinch phenomenon of RC column under lateral cyclic loads and the parameters of material constitutive relation,number of integration points and length of plastic hinge in beam with hinges fiber element model has great influence on numerical simulation.更多还原