【摘要】 为研究型钢混凝土框架柱在反复荷载作用下的效应,采用开源的有限元分析软件OpenSEES,建立起基于纤维模型的型钢混凝土柱精细化模型,通过定义不同单轴材料本构模型的纤维来模拟其各自不同的应力—应变关系,结合非线性梁柱单元,形成完整的型钢混凝土柱模拟技术。并采用此模型对低周反复荷载作用下4个不同截面形式的型钢混凝土柱进行了滞回性能的全过程数值模拟。研究结果表明:此型钢混凝土柱精细化模型的数值模拟结果与试验结果吻合较好,所建立的型钢混凝土柱模型的OpenSEES数值模拟技术是合理、可行的,适用于基于纤维模型的型钢混凝土柱有限元数值模拟和受力性能的深入研究。更多还原

【Abstract】 In order to investigate the behavior of SRC(Steel Reinforced Concrete) column under low-cycle loading,the open source finite element software OpenSEES was used to establish an accurate model of SRC column based on the nonlinear beam-column element.Different fibers were defined to simulate different stress-train relationships.And then,the model was used to simulate the hysteretic behavior of SRC columns of four different sections under low-cycle reciprocating loads.The results given by this model agree well with the experiment results.The SRC column model is reasonable and feasible,and it can be applied to numerical simulation and in-depth study of SRC columns.更多还原