基于荷载试验的装配式T梁桥横向分布计算  

Transverse Distribution Calculation of Prefabricated T-beam Bridge Based on Load Test

作　　者：钱若霖 苏佩 QIAN Ruo-lin;SU Pei(Civil Engineering College,Shaanxi Polytechnic Institute,Xianyang,Shaanxi,712000,China)

机构地区：[1]陕西工业职业技术学院土木工程学院,陕西咸阳712000

出　　处：《建材技术与应用》2023年第1期6-9,共4页Research and Application of Building Materials

基　　金：陕西工业职业技术学院院级科研基金资助项目(2022YKYB-017)。

摘　　要：为了研究T形梁桥主梁受力分布情况,分别基于既有横向分布理论和在役桥梁荷载试验计算分析其横向分布的特征与区别,以一孔40 m跨径桥梁为研究对象,分别采取刚性横梁理论计算方法、有限元法和荷载试验下挠值反算方法计算了依托桥梁工程的荷载横向分布系数,结果表明:3种计算方法下桥梁荷载横向分布规律基本一致,但实测横向分布系数小于刚性横梁法理论和有限元计算结果,且力的分布更加趋于均匀,这是因为实桥形成整体受力体系,荷载传递效率更高,能够尽可能均匀地分布开来,采用理论方法和有限元法计算T梁桥的荷载横向分布系数结果具有更高的安全储备。In order to study the force distribution of the main girder of the T-shaped beam bridge, the characteristics and differences of the lateral distribution were calculated and analyzed based on the existing lateral distribution theory and the actual load test of the bridge in service.Taking a 40 m span bridge with one hole as the research object, the transverse distribution coefficient of the load of the bridge was calculated by using the rigid beam theory, the finite element method and the inverse calculation method of the deflection under the load test.The results show that the transverse distribution law of bridge load under the three calculation methods is basically the same, but the measured transverse distribution coefficient is smaller than the theoretical results of rigid beam method and finite element calculation, and the distribution of force tends to be more uniform, because the real bridge forms an overall stress system, the load transfer efficiency is higher, and can be distributed as evenly as possible.The theoretical method and finite element method are adopted.The result of calculating the load lateral distribution coefficient of the T-beam bridge by the element method has a higher safety margin.

关 键 词：刚性横梁法 荷载试验 T梁桥 横向分布 

分 类 号：U443.3[建筑科学—桥梁与隧道工程]