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为了研究PC桥梁裂缝统计参数对结构的影响,对国内某地区T梁桥的裂缝进行了调研分析,并按照相关规范对桥梁的开裂状况进行分类统计,确定了以裂缝位置、裂缝宽度和裂缝高度作为桥梁裂缝统计参数。根据所确定裂缝参数的敏感性分析,利用Midas/FEA建立了无损预应力混凝土结构与各裂缝统计参数下的有限元模型,分析了裂缝统计参数对结构刚度以及承载力的影响,得出了裂缝统计参数对T梁桥刚度及承载力影响权值。结果表明:裂缝的宽度和深度是影响PC桥梁承载力的主要因素。
In order to study the influence of PC bridge crack statistical parameters on the structure, the cracks in the T girder bridge in a certain area of China were investigated and analyzed. According to the relevant codes, the cracking status of the bridge was classified and classified. The fracture location, crack width and crack height As a bridge crack statistical parameters. According to the sensitivity analysis of the determined crack parameters, the finite element model under the statistical parameters of the non-destructive prestressed concrete structure and the fractures is established by using Midas / FEA. The influence of the statistical parameters of the crack on the structural rigidity and bearing capacity is analyzed, and the fracture Influence of Statistical Parameters on Stiffness and Bearing Capacity of T-Beam Bridge. The results show that the width and depth of cracks are the main factors affecting the bearing capacity of PC bridges.