This paper presents a simplified beam-column joint modeling technique for the inelastic analysis of reinforced concrete moment-resisting frames. The joint model consists of a zero-length link element that is provided with moment-rotation lumped plasticity hinge, provided at the intersection of beam/column elements, to simulate the nonlinear shear behavior of the joint panel. The backbone of the moment-rotation constitutive law was defined using the empirical shear stress-shear strain relationship proposed by Kim and LaFave. The hysteretic response of the joint was simulated using the multi-linear hysteretic rule proposed by Sivaselvan and Reinhorn. The modeling technique was applied to two portal frames tested under quasi-static cyclic loads for predicting the cyclic force-displacement hysteretic response. The prediction was found in good agreement with the experimental response; the numerical models were efficient in simulating the shear behavior of the joints, loading/unloading stiffness and pinching behavior of the frames’ lateral force-displacement hysteretic response. The modeling technique was extended to two-story frames for nonlinear response history analysis for both design base and maximum considered earthquakes. Inter-story drift demands were obtained and critically compared to highlight the efficacy of the accurate modelling of beam-column joint using lumped plasticity shear simulation hinges. The study also confirms the beneficial role of beam-column joint detailing in resisting both design base and maximum considered earthquakes without exceeding the life safety and collapse prevention limit states respectively.

本文提出了一种简化的梁柱联合建模技术，用于钢筋混凝土抗弯框架的非弹性分析。关节模型由零长度链接元素组成，该元素在梁/柱元素的交点处提供有力矩旋转集总塑性铰链，以模拟关节面板的非线性剪切行为。利用Kim和LaFave提出的经验剪切应力-剪切应变关系定义了矩-旋转本构关系的主干。使用Sivaselvan和Reinhorn提出的多线性滞后规则来模拟关节的滞后响应。该建模技术应用于准静态循环载荷下测试的两个门架，以预测循环力-位移滞后响应。发现该预测与实验响应高度吻合。数值模型可以有效地模拟节点的剪力，加载/卸载刚度以及框架的横向力-位移滞后响应的挤压行为。该建模技术已扩展到两层框架，用于设计基准地震和最大考虑地震的非线性响应历史分析。获得了层间位移需求，并进行了严格比较，以强调使用集总可塑性剪切模拟铰链对梁柱节点进行精确建模的有效性。这项研究还证实了梁柱节点细化在抵抗设计基准和最大考虑地震的同时不超过生命安全和防止塌陷极限状态的有益作用。