支承形式对波形钢腹板预应力混凝土曲线箱梁剪力滞效应的影响

Influence of Support Manners on Shear Lag Effect of PC Curved Box Girder with Corrugated Steel Webs

为研究不同支承形式对波形钢腹板预应力混凝土曲线箱梁剪力滞效应的影响,采用ANSYS软件建立单跨波形钢腹板曲线箱梁的有限元模型,在跨中集中荷载和全桥分布荷载作用下,分析不同支座布置形式下的剪力滞效应。研究结果表明:单跨波形钢腹板曲线箱梁在集中荷载下,4种支承的最大剪力滞系数均出现在跨中截面,从大到小依次为静定中心支承、静定偏心支承、超静定中心支承、超静定偏心支承。在分布荷载下,4种支承对应的跨中控制截面的剪力滞系数均在1.161左右,差异较小。

In order to study the inf luence of different support manners on shear lag effect of PC curved box girder with corrugated steel webs,the f inite element model of single-span curved box girder with corrugated steel webs was established by using software ANSYS.The mid-span concentrated load and full-bridge distributed load were considered,then the shear lag effects of several support manners were analyzed.The results show that under the concentrated load,the maximum shear lag coeff icients of four kinds of supports all appear in the mid-span section of the single-span curved box girder with corrugated steel webs,and from descending order are:statically determinate center support,statically determinate eccentric support,statically indeterminate center support,statically indeterminate eccentric support.Under the distributed load,the shear lag coeff icients of the mid-span control sections of the four supports are all about 1.161,with little difference.