基于有限元方法对旧铁路桥梁承载力评估分析

Evaluation and Analysis on Bearing Capacity of Old Railway Bridges Based on Finite Element Method

摘要:

随着城市建设的快速发展，城市交通线路也在不断升级或改造，越来越多的城市老旧桥梁面临着承载能力不足的问题，而由于部分管养单位资料保管体系不完善，早期修建的部分旧桥缺乏可参考的设计图纸及交竣工资料。在此背景下，以某一实际城市铁路桥梁案例为依托，通过现场检测桥梁表观缺损情况并采用有限元软件桥梁博士对其承载力进行评估分析，论证该老旧铁路桥梁升级或改造的可行性并提出合理化建议，确保行驶车辆以及过往行人安全通行。

Abstract:

With the rapid development of urban construction and the upgrading or reconstruction of urban traffic some lines, more and more old urban bridges are facing the problem of insufficient bearing capacity. Due to the poor data management in the maintenance process of some early bridges, the old bridge lacks relevant design drawings and completion data. Relying on an actual urban railway bridge case, its bearing capacity are elevated and analyzed by detecting the apparent defects of the bridge on site and using the finite element software Bridge Doctor in order to demonstrate the feasibility of upgrading or reconstructing this old railway bridge, and the retionalization proposal is put forward for ensuring the safety traffic of driving vehicles and pedestrians.