基于裂缝参数的在役桥梁横向分布计算  

Calculation of Lateral Distribution of In-Service Bridges Based on Crack Parameters

作　　者：钱若霖 苏佩 Qian Ruolin;Su Pei(Civil Engineering College,Shaanxi Polytechnic Institute,Xianyang 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：《石家庄铁道大学学报（自然科学版）》2022年第2期10-14,共5页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：陕西省教育厅一般专项科学研究计划项目(20JK0501);陕西工业职业技术学院院级科研基金(2022YKYB)。

摘　　要：刚性横梁法计算桥梁荷载横向分布具有便捷高效的特点,传统计算方法并未考虑主梁刚度折减对于计算结果的影响,完全按照设计截面刚度计算对于新建桥梁适用性较高,但对于在役桥梁,尤其是服役时间较长的桥梁,该方法具有一定局限性,计算结果和桥梁结构真实受力出入较大。为精确在役桥梁横向分布计算,基于裂缝外观参数特征值,引入刚度折减系数的概念,对传统刚性横梁法进行修正,并推导出其理论公式。通过有限元法和实桥荷载试验数据对比分析,结果表明,考虑裂缝参数修正的刚性横梁法计算更加精确,对于在役桥梁的真实受力状态和承载能力的评估具有重要意义,采用该方法进行在役桥梁荷载试验方案的编制,可达到精确校验系数的目的。The rigid beam method is convenient and efficient to calculate the lateral load distribution of the bridge.The traditional calculation method did not consider the influence of the main girder stiffness reduction on the calculation results.The calculation based on the design section stiffness is more suitable for new bridges,but for in-service bridges.Especially for bridges that have been in service for a long time,this method has certain limitations,and the calculation results differ greatly from the actual forces of the bridge structure.In order to accurately calculate the lateral distribution of in-service bridges,based on the characteristic values of the crack appearance parameters,the concept of stiffness reduction coefficient was introduced,the traditional rigid beam method was revised,and its theoretical formula was derived.Through the comparative analysis of the finite element method and the actual bridge load test data,the results show that the rigid beam method considering the correction of the crack parameters is more accurate,and it is of great significance for the evaluation of the real stress state and bearing capacity of the in-service bridge.This method can be used for the preparation of the in-service bridge load test plan to achieve the purpose of accurately verifying the coefficients.

关 键 词：裂缝 刚性横梁法 在役桥梁 横向分布 

分 类 号：U443.3[建筑科学—桥梁与隧道工程]