基于纤维模型的钢筋混凝土柱滞回性能数值分析

Numerical analysis of RC columns under reversed cyclic loading based on fiber model

采用纤维模型,基于刚度法、柔度法的非线性梁柱单元理论及塑性铰理论,分别编制了钢筋混凝土柱在反复荷载作用下的非线性分析程序,通过3种方法模拟的分析结果与钢筋混凝土压弯柱反复加载试验结果的对比,验证了基于纤维模型的3种非线性分析方法的有效性,比较分析结果表明:基于柔度法的纤维模型梁柱单元在强非线性阶段的计算效果优于基于刚度法和塑性铰模型的梁柱单元.

Three nonlinear programs for hysteresis performances of reinforced concrete columns under cyclic loading were developed based on the fiber model with stiffness-based and flexibility-based non-linear beam-column elements and plastic hinge model.Test results of a column under cyclic compressive-bending loads were compared with the numerical analysis results of three methods,validating the computational effectiveness of three methods based on fiber model.Through comparison of the simulating results,it is shown that the flexibility-based non-linear beam-column elements are superior to the stiffness-based beam-column elements and plastic hinge model in dealing with the column＇s behaviors in strong nonlinear phase.