CAJ | 학술논문

为研究铁路钢箱混合梁斜拉桥钢－混结合段的受力特征及传力机理，以宁波铁路枢纽北环线甬江特大桥为背景，采用ANSYS有限元软件建立该桥钢－混结合段的三维有限元模型，分析钢－混结合段中钢壳体和混凝土的受力及轴力分配比例。结果表明：在计算荷载作用下，结构纵向受力板件均处于受压状态，应力水平较低；除承压板处发生突变外，其他部位变化平缓；混凝土各截面应力水平较低，截面发生一定的面外变形；承压板传力作用较大，结合段54％的轴力通过其传递，其余轴力通过PB L键和剪力钉传递；剪力键轴力传递比例呈两头大、中间小的马鞍形分布。
위연구철로강상혼합량사랍교강－혼결합단적수력특정급전력궤리，이저파철로추뉴북배선용강특대교위배경，채용ANSYS유한원연건건립해교강－혼결합단적삼유유한원모형，분석강－혼결합단중강각체화혼응토적수력급축력분배비례。결과표명：재계산하재작용하，결구종향수력판건균처우수압상태，응력수평교저；제승압판처발생돌변외，기타부위변화평완；혼응토각절면응력수평교저，절면발생일정적면외변형；승압판전력작용교대，결합단54％적축력통과기전체，기여축력통과PB L건화전력정전체；전력건축력전체비례정량두대、중간소적마안형분포。
To investigate the force characteristics and force transfer mechanism of the steel and concrete joint section of railway hybrid box girder cable‐stayed bridge ,the Yongjiang River Bridge on the North Ring Link of Ningbo Railway Terminal was taken as an example .The soft‐ware ANSYS was used to establish the three‐dimensional finite element model for the steel and concrete joint section of the bridge ,the force conditions and axial force distribution proportions of the steel shell and concrete in the joint section w ere analyzed .T he results of the analysis demon‐strate that under the action of the calculated load ,the structural longitudinal force‐bearing plates are all in the compression state and the structural stress levels are low .With the exception that the forces in the bearing plate change abruptly ,the changing of the forces in other parts is gentle . The stress levels of the different sections of the concrete are low and certain out‐of‐plane deforma‐tion of the sections occurs .The function of the bearing plate in the force transfer is significant . About 54% axial force of the joint section transfers via the bearing plate while the rest of the axi‐al force transfers via the PBL connectors and shear studs . The proportions of the axial force transfer of the connectors present the saddle‐shape distribution that is large at both ends and small in the middle .