北绕阳河桥碳纤维加固技术及抗震性能分析

阜新市北绕阳河桥是一座待维修加固的险桥,结合工程实例,提出碳纤维加固方案。为验证加固效果,采用大型通用有限元分析软件ANSYS作为平台,对加固前后的"三肋拱梁"进行了静载荷作用下应力和变形的有限元分析。结果表明,经CFRP加固后可有效减小梁的挠度变形,提高其承载能力。通过对加固前后桥梁结构地震作用下的主要内力和位移响应对比分析表明,粘贴高强纤维能够有效增强结构的强度和刚度,提高该钢筋混凝土桥梁的抗震性能。

ANALYSIS OF ANTI-SEISMIC PERFORMANCE OF BEIRAOYANG RIVER BRIDGE REINFORCED WITH CFRP

There is a dangerous bridge over Beiraoyang River in Fuxin city,carbon fiber reinforced polymer(CFRP) reinforcement plan is presented combining with this project case.To verify the reinforcement effect,finite element analysis of both reinforced and unreinforced triple-rib arched girder with static loading is completed.The results of stress and deformation show that CFRP can reduce deflection and increase bearing capacity of the bridge.The analysis of principal stress and displacement response of both reinforced and unreinforced bridge show that both strength and stiffness of the structure can be increased by sticking CFRP,and anti-seismic performance of the RC bridge is improved remarkably.