PC箱梁桥弯曲孔道接触应力分布研究  

Research on Contact Stress of Bent Passage of PC Box Girder Bridge

作　　者：张开银[1] 吴庆迎 曾超 张志富 ZHANG Kaiyin;WU Qingying;ZENG Chao;ZHANG Zhifu(Wuhan University of Technology,School of Transportation and Logistics Engineering,Wuhan 430063,China;China Railway Second Bureau Group Limited,Chengdu 610031,China)

机构地区：[1]武汉理工大学交通与物流工程学院,武汉430063 [2]中铁二局集团有限公司,成都610031

出　　处：《武汉理工大学学报(交通科学与工程版)》2025年第1期108-112,共5页Journal of Wuhan University of Technology(Transportation Science & Engineering)

基　　金：国家自然科学基金(51809209)。

摘　　要：文中结合某城市轨道交通装配式PC箱梁桥,探究了现行桥梁规范中关于弯曲孔道摩阻损失理论假定的局限性.以现有研究成果为基础,基于弹性接触理论,修正并提出多种接触正应力分布形式,并推导相应正应力分布下弯曲孔道摩阻损失计算公式,证明任意圆弧分布形接触正应力下摩阻损失公式具有优越性.Combined with an assembled PC box girder bridge of urban rail transit,the limitations of theoretical assumptions about friction loss of curved channels in current bridge specifications were explored.Based on the existing research results and the elastic contact theory,a variety of contact normal stress distribution forms were revised and proposed,and the calculation formula of friction loss of curved channel under the corresponding normal stress distribution was derived.It is proved that the formula of friction loss under normal contact stress of arbitrary arc distribution is superior.

关 键 词：桥梁工程 预应力损失 弯曲孔道 摩阻损失 接触应力分布 

分 类 号：TU378[建筑科学—结构工程]