曲线波纹钢腹板组合箱梁剪力滞翘曲位移函数研究  

Study on Shear Lag Warpage Displacement Function of Composite Box Girder with Curved Corrugated Steel Web

作　　者：王连广[1] 佟永晨 陈力栋 WANG Lianguang;TONG Yongchen;CHEN Lidong(School of Resources and Civil Engineering,Northeastern University,Shenyang,China,110819)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《沈阳建筑大学学报（自然科学版）》2021年第3期411-418,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金青年基金项目(51808100);辽宁省自然基金指导计划项目(2019-ZD_0004);辽宁省自然科学基金项目(20170540303)。

摘　　要：目的为解决曲线组合箱梁剪力滞效应分析方法、计算理论存在局限性的问题,提出一种解析的求解方法。方法考虑滑移效应和弯扭耦合影响的同时,基于最小势能原理,建立分别基于抛物线型和余弦函数型位移函数的曲线波纹钢腹板组合箱梁的剪力滞效应的控制微分方程,及数值计算公式。通过对曲线波纹钢腹板组合箱梁实取截面进行计算分析,采用加权余量法对组合箱梁进行不同剪力滞翘曲位移下应变曲线规律的探讨。结果当剪力滞翘曲函数按n次抛物线设定时,n的取值对应变影响大小有限;相较于n次抛物线函数变化形式,余弦函数变化形式的应变差值更大,剪力滞效果更明显。结论曲线波纹钢腹板组合箱梁顶底板的应变曲线随剪力滞翘曲位移函数的不同选择呈现出较大的差别。In order to solve the limitations of the analysis method and calculation theory of the shear lag effect of curved composite box girder,an analytical solution method was proposed.Based on principle of minimum potential energy,differential equations and numerical calculation formats of a curved corrugated steel web composite box girder was established based on both the sliding effect and the bending-torsional coupling effect and based on parabolic and cosine function displacement functions,respectively.The strain curve of the composite box girder’actual section under different shear lag and warpage displacement was discussed by weighted residual method.When the shear lag warping function is set according to the n-th parabola,the value of n has a limited effect on the strain;the strain difference of the cosine function variation is larger and the shear lag effect is more obvious compared with that of the n-th parabolic function.The results show that the strain curves of the top and bottom plates of curved corrugated steel web composite box girder vary greatly with the shear lag warping displacement function.

关 键 词：波纹钢腹板 曲线组合箱梁 剪力滞效应 翘曲位移函数 

分 类 号：TU398[建筑科学—结构工程]