基于OpenSees的锈蚀钢筋混凝土梁精细化模拟研究  

Research on Fine Simulation of Rusted Reinforced Concrete Beams Based on OpenSees

作　　者：崔启凡 Cui Qifan(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)

机构地区：[1]青岛理工大学土木工程学院,青岛市266033

出　　处：《北方交通》2023年第8期5-9,共5页Northern Communications

摘　　要：为研究锈蚀钢筋混凝土梁力学性能退化的影响因素,基于OpenSees有限元软件建立精细化模型。锈蚀模型考虑钢筋力学性能退化,受压区混凝土强度降低以及钢筋与混凝土间粘结退化,与现有试验的荷载-挠度曲线吻合良好。研究结果表明:考虑粘结滑移的钢筋混凝土梁模型与试验裂缝发展趋势吻合;受拉钢筋锈蚀后的屈服强度决定锈蚀梁的承载力;粘结滑移导致梁的延性变差,较早发生承载力陡降;随着锈蚀率成比例的增加,锈蚀梁的承载力成比例降低,提前发生破坏。In order to study the influencing factors of mechanical performance degradation of rusted reinforced concrete beams,the refined model is established based on OpenSees finite element software.The mechanical performance degradation of the reinforcing steel bar is considered through the rusted model,the reduction of concrete strength in the compression zone and the degradation of bond between the reinforcing steel bars and concrete are in good agreement with the load-deflection curve of the existing experiments.The research results show that:the model of the reinforced concrete beam considering the bond slip is consistent with the development trend of the experimental crack;the yield strength of rusted tensile steel bars determines the bearing capacity of rusted beams;the bond slip leads to a decrease in the ductility of the beam,resulting in an early sharp decrease in bearing capacity;as the rust rate increases proportionally,the bearing capacity of the rusted beam decreases proportionally,leading to early failure.

关 键 词：OPENSEES 锈蚀 钢筋混凝土 粘结滑移 承载力 分离式模型 

分 类 号：TU375.1[建筑科学—结构工程]