钢筋粘结滑移对钢筋混凝土墩柱抗震性能影响

摘要

For the study of bond-slip effect on reinforced concrete column elastoplastic hysteretic behavior under seismic loading, the OpenSEES finite element is used in numerical simulation. The curvature of bond-slip parameter analysis is made by changing pier ductility, steel yield strength, confined concrete and the loading process. The results show that the fiber model based OpenSEES can simulate the characteristics of hysteresis loop, and the model considering bond -slip can better reflect the hysteresis curve of the "pinch" effect and the degradation of strength and stiffness columns, which can provide reference for numerical simulation of reinforced concrete columns and seismic response.%为了研究钢筋粘结滑移对钢筋混凝土墩柱在地震荷载下的弹塑性滞回性能的影响,采用有限元OpenSEES对试验墩柱进行了有限元数值模拟,同时参数分析了在改变墩柱延性、钢筋屈服强度、混凝土的约束以及加载历程对粘结滑移曲率的影响.分析结果表明:考虑钢筋粘结滑移的模型能较好地反映滞回曲线的“捏拢”效应以及墩柱强度与刚度的退化作用,与实际结果模拟较好,可供钢筋混凝土墩柱数值模拟和地震反应分析参考.