This study examines the behavior of reinforced concrete beam columns joints retrofitted using externally bonded carbon fiber-reinforced polymer plates using a nonlinear finite element model. The internal beam column joint was studied under the monotonic loading. The finite element models were calibrated and verified by comparing the resulted load-drift ratio responses and failure modes with the previous experimental studies. The investigated parameters were as follows: configurations of carbon fiber-reinforced polymer plates. The carbon fiber-reinforced polymer plate thickness and concrete compressive strengths. The results showed that applying monotonic loading instead of cyclic loading and comparing it to the envelopes of experimental curves was considered to be a good alternative approach to represent the cyclic loading. Generally, the finite element model results demonstrated that adding carbon fiber-reinforced polymer plates to the beam column joints increased its loading capacity by 60–139.8%. Increasing the plate thickness of carbon fiber-reinforced polymer slightly enhanced the joint’s loading capacity, but increasing the concrete strength for constant thickness of carbon fiber-reinforced polymer plate had significantly enhanced the joint’s loading capacity. All simulated slabs failed in debonding carbon fiber-reinforced polymer plate.

本研究使用非线性有限元模型研究了使用外部粘合碳纤维增强聚合物板改造的钢筋混凝土梁柱接头的行为。对单调荷载作用下的内梁柱节点进行了研究。通过将所得的负载漂移比响应和失效模式与之前的实验研究进行比较，对有限元模型进行了校准和验证。研究的参数如下：碳纤维增强聚合物板的配置。碳纤维增强聚合物板的厚度和混凝土的抗压强度。结果表明，应用单调载荷代替循环载荷并将其与实验曲线的包络线进行比较被认为是表示循环载荷的良好替代方法。总体而言，有限元模型结果表明，在梁柱节点添加碳纤维增强聚合物板可使其承载能力提高60%~139.8%。增加碳纤维增强聚合物板的厚度略微增强了节点的承载能力，但在碳纤维增强聚合物板厚度恒定的情况下增加混凝土强度显着增强了节点的承载能力。所有模拟板均未能使碳纤维增强聚合物板脱粘。