配置HRB500 E钢筋梁柱节点数值模拟

摘要

The super beam-column joint model is adopted to simulate the nonlinear response of beam-column joint with HRB500E reinforced bar under low cyclic loading. An analysis program is edited based on finite element ( FE) software OpenSees. This program adopts the Beam-Column Joint element and suitable material constitutive models. The parameters of the shear panel are determined by the Modified Compression-Filed Theory ( MCFT) . A matlab program based the MCFT is used to determine the shear capacity of the shear panel. Three beam-column joint specimens with HRB500E reinforcements are simulated by OpenSees for the verification and calibration of FE method. For the comparison of hysteretic behaviors between the experiment and numerical analysis, the hysteretic curves show a reasonable agreement with small difference of ultimate capacity, coincident peak loads of hysteretic loops as well as similar pinching effects.%本文采用超级节点模型模拟配置HRB500E钢筋梁柱节点在低周反复荷载作用下的非线性反应。基于OpenSees软件编写了分析程序，该程序选取Beam-Column Joint单元及合适的材料本构模型，并利用修正斜压场理论( MCFT)确定节点核心区的参数。 MCFT定参通过自编Matlab算例实现。通过OpenSees软件对3个配置HRB500E钢筋梁柱节点试件进行数值模拟，得到试件梁端的荷载-位移曲线。通过与试验结果对比发现，两者的滞回曲线吻合良好，具体表现为滞回曲线最大荷载误差较小、滞回环峰值荷载走势较一致，并且捏缩效应也较一致。