市政技术2026，Vol.44Issue(9)：35-44,147,11.DOI:10.19922/j.1009-7767.2026.09.035
静风荷载作用下新型钢桁腹杆-混凝土组合拱桥力学性能研究
Study on Mechanical Performance of Novel Steel-Truss-Web-Concrete Composite Arch Bridge Under Static Wind Load
摘要
Abstract
The novel steel-truss-web-concrete composite arch bridge features a composite arch ring composed of steel-truss webs and concrete top-bottom slabs.The steel-truss webs can substantially improve the transverse wind-permeability of the arch ring;nevertheless,transverse static wind load still induces out-of-plane internal forces and deformations in the arch ring.Therefore,taking Wumengshan Extra-large Bridge,the first bridge of this type in China,as the research object,a three-dimensional finite element model is established using ANSYS software to an-alyze the structural natural vibration characteristics,and the model is validated via field modal test of the completed bridge.Static wind loads acting on concrete T-girders,spandrel columns and composite arch ring are calculated,and numerical analysis is performed for the mechanical responses of the bridge subjected to static wind load.The re-sults show that compared with the stiff-skeleton arch bridge,the maximum transverse deformation of this novel composite arch bridge is merely 15.8％higher,and the maximum axial compressive stress of the steel truss chord member in the arch ring increases by 25.2％;the overall static-wind-induced effects of the two bridge types show little discrepancy.As the reference design wind speed rises,the maximum transverse deformations of both bridges increase non-linearly,and their deformation discrepancy gradually expands.The difference in maximum axial compressive stress of the steel truss upper-chord members of the two arch rings ranges from 27 MPa to 33 MPa,while the stress difference of lower-chord members stabilizes at approximately 40 MPa.关键词
钢桁腹杆-混凝土组合拱桥/组合拱圈/静风荷载/结构变形/钢桁应力Key words
steel-truss-web-concrete composite arch bridge/composite arch ring/static wind load/structural de-formation/steel truss stress分类
交通工程引用本文复制引用
杨圣,万柏辰,许健,张博珊,孙华怀..静风荷载作用下新型钢桁腹杆-混凝土组合拱桥力学性能研究[J].市政技术,2026,44(9):35-44,147,11.基金项目
国家自然科学基金项目(52208214) （52208214）
