作　　者： ; ; ;

机构地区： 东南大学

出　　处： 《工业建筑》 2010年第10期6-10,共5页

摘　　要： 某铁路特大桥部分桥墩在施工过程中出现不同程度的水平、竖向和斜向裂缝,通过综合分析,决定对桥墩裂缝进行深层灌胶处理后,再采用置换高强加固型混凝土的方法进行裂缝封闭及对整体结构进行加固。为论证该加固方案的可靠性,采用ANSYS有限元软件进行模拟分析,分析了桥墩在未开裂工况、开裂工况、加固后工况下的应力、线刚度及偏心的变化。结果表明,该加固方案是安全可靠的,可供同类桥墩裂缝加固设计参考。 There were various cracks occurred during the construction of piers for a railway bridge.After comprehensive analysis,an effective method was accepted,with which structural adhesives were filled into the cracks firstly,then the cracks were sealed by high-strength reinforced concrete.In order to demonstrate the reliability of this reinforcement design,ANSYS FEM software was used to simulate and analyse the piers.The differences of stresses and linear stiffness and eccentricities of the piers were analyzed for un-cracked,cracked and strengthened conditions.The results show that the reinforcement design is safe and reliable.It can be used for reference of reinforcement design of similar piers with cracks.

关 键 词： 桥墩 裂缝 有限元分析 加固设计

领　　域： [建筑科学]