作者：罗秀, 倪家明, 程志巧

作者单位：成都工业学院材料与环境工程学院， 四川 成都 611730

关键词：波形钢腹板;曲线箱梁;剪力滞;有限元;参数分析

摘要：

为研究波形钢腹板PC曲线箱梁的剪力滞效应，利用有限元分析软件ANSYS建立波形钢腹板PC曲线箱梁的有限元模型，分析跨中集中荷载和全桥均布荷载两种工况下典型截面的应力分布，得到截面的剪力滞系数。讨论8种几何参数对波形钢腹板PC曲线箱梁剪力滞系数的影响。研究结果表明：曲线箱梁的剪力滞效应大于直箱梁，平钢腹板引起的剪力滞效应胜于波形钢腹板；曲线箱梁内侧的剪力滞效应比外侧严重；悬臂长a、圆心角θ、曲率半径R、梁高H对波形钢腹板PC曲线箱梁剪力滞的影响是主要的，承托长b、翼缘板厚度t次之，横隔板数量n和波高h基本无影响。

Research on influence parameters of shear lag effect of PC curved box girders with corrugated steel webs
LUO Xiu, NI Jiaming, CHENG Zhiqiao
College of Materials and Environmental Engineering, Chengdu Technological University, Chengdu 611730, China
Abstract: In order to study the shear lag effect of PC curved box girder with corrugated steel webs, the finite element model of PC curved box girder with corrugated steel webs is established by the finite element analysis software ANSYS, and the shear lag coefficient of the section is obtained by analyzing the stress distributions of typical sections under two working conditions, that is, central load and full bridge uniformly distributed load. 8 kinds of geometrical parameters on the shear lag coefficient of PC curved box girder with corrugated steel webs is discussed. The results show that the shear lag effect of curved box girder is larger than that of straight box girder, and the shear lag effect caused by flat steel webs is more serious than that of corrugated steel webs. The shear lag effect on the inner side of curved box girder is more serious than that on the outside, the cantilever length, the center angle, the radius of curvature and the beam height influence on the shear lag of the PC curved box girder with corrugated steel webs are the main, and the thickness of supporting and flange plate is the second.  the number of diaphragm and wave height have no effect.
Keywords: corrugated steel webs;curved box girders;shear lag;FEM;parametric analysis
2023, 49(3):166-171  收稿日期: 2021-06-27;收到修改稿日期: 2021-09-15
基金项目:
作者简介: 罗秀(1984-),女,四川成都市人,讲师,主要从事土木工程建造与管理、BIM技术应用研究
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