基于有限元软件对双曲拱桥承载力的评价

Evaluation of the Bearing Capacity of Hyperbolic Arch Bridges Based on Finite Element Software

双曲拱桥,是我国上个世纪60年代至70年代兴起的,是一种由我国设计师设计的桥梁。本文以荆州市太湖港某桥为背景,由于该桥成桥时间较早,并且缺乏日常的维护工作,因此需要对该桥进行检测维护。基于现场桥梁采集的相关数据,结合桥梁博士对桥梁承载力的评估,得出有限元模拟结果。结果显示在1.0汽车荷载条件下,该桥的最大、最小弯矩对应的抗力无法满足日常运行需求;但在0.7汽车荷载条件下该桥最大弯矩对应的抗力以及最小弯矩对应的抗力满足相关规范要求,并且挠度验算也满足规范要求。因此满足日常运营要求。由上述结果得出,应对该桥进行混凝土加固,同时限制往来车辆重量。为相应工程养护维修方案的选定与决策提供依据与参考。

The hyperbolic arch bridge,which emerged in China from the 1960s to 1970s,is a kind of bridge designed by our designers.This paper takes a bridge in Taihu Harbor,Jingzhou City as the background,which needs to be inspected and maintained due to its early formation and lack of routine maintenance work.Based on the relevant data collected from the bridge at the site,the finite element simulation results were derived by combining the bridge load capacity assessment by Dr.Bridge.The results show that the maximum and minimum bending moments of the bridge under 1.0 vehicle load conditions could not meet the daily operation requirements;however,the maximum and minimum bending moments of the bridge under 0.7 vehicle load conditions met the relevant code requirements,and the deflection test also met the code requirements.Therefore,it meets the daily operation requirements.From the above results,it is concluded that the bridge should be reinforced with concrete and the weight of the traffic should be limited.It provides a basis and reference for the selection and decision of the corresponding engineering maintenance and repair plan.