波形钢腹板PC曲线箱梁剪力滞效应的数值分析  

Numerical analysis of shear lag effect of PC curved box girder with corrugated steel webs

作　　者：孙韬[1] SUN Tao(School of Architectural Technology,Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China)

机构地区：[1]江苏建筑职业技术学院建筑建造学院,江苏徐州221116

出　　处：《中国测试》2021年第8期159-164,共6页China Measurement & Test

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同时建立波形钢腹板PC曲线箱梁和普通PC曲线箱梁的实体模型,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,得到典型截面的剪力滞系数,并做对比分析。研究结果表明:采用波形钢腹板增加典型断面的最大剪力滞系数,曲线箱梁内侧的剪力滞效应比外侧严重。集中荷载下,顶板剪力滞系数大于底板;均布荷载下,反之。等跨PC连续曲线箱梁桥剪力滞效应比简支曲梁的严重。一联的孔数越多,剪力滞效应也越显著。在一联四孔的连续曲线箱梁中,中跨跨中,边跨跨中,主内支座,次内支座处的剪力滞系数依次减少。In order to study the shear lag effect of PC curved box girder with corrugated steel webs,the solid model of PC curved box girder with corrugated steel webs and ordinary PC curved box girder was established by using finite element analysis software.In this paper,the stress distribution of typical section under two operating conditions of central load and full bridge uniformly distributed load is analyzed,and the shear lag coefficient of typical section is obtained and made a comparative analysis.The results show that:the maximum shear lag coefficient of the typical section is increased by using the corrugated steel webs,and the shear lag effect on the inside of the curved box girder is worse than that of the outer side.Under the concentrated load,the shear lag coefficient of the roof is larger than the bottom plate;the shear lag effect of constant-span PC continuous curved box girder bridge is more serious than that of simply supported curved beam.The more the number of holes in a joint,the more significant shear lag effect is.In a continuous curved box girder with four holes,middle-span span,the side span,the main internal support,the secondary support at the time the shear lag coefficient decreases.

关 键 词：波形钢腹板 曲线箱梁 剪力滞 有限元 

分 类 号：U448.38[建筑科学—桥梁与隧道工程]