摘要
基于费氏空腹桁架理论,建立剪力键式T钢空腹梁在不同边界条件及荷载模式下的竖向挠度简化计算公式,并通过精细化有限元方法验证其精度.根据简化计算方法,分析不同跨高比、空腹率、网格尺寸对弯曲挠度、剪切挠度、肋局部弯曲挠度在总挠度中占比的影响规律,提出挠度系数的回归方程.分析表明:简化计算方法具有较高的计算精度,结构参数对总体弯曲挠度、肋局部弯曲挠度在总体挠度中的占比影响较大,挠度系数取值范围较广.
This paper presents a new simplified calculation method for the deflection calculation of steel vierendeel beams basing on the theory of Allftlish vierendeel truss.The accuracy of the method is verified by the finite element method.The influence of parameters including span-depth ratio,hollow ratio and grid sizes on the deflection composition is analyzed.And the expression of deflection coefficients can be obtained by regression analysis.The result shows that,the practical method for the deflection calculation is of high-accuracy,the influence of structural parameters on the deflection composition cannot be neglected,and deflection coefficients can vary in a vast range.
作者
姜岚
马克俭
张华刚
李莉
杨期柱
JIANG Lan;MA Ke-jian;ZHANG Hua-gang;LI Li;YANG Qi-zhu(School of Civil Engineering,Hunan University,Changsha410012,China;Space Structure Research Center,Guizhou University,Guiyang550003,China;College of Town and Country Construction,Shaoyang University,Shaoyang422000,China)
出处
《空间结构》
CSCD
北大核心
2019年第2期39-45,共7页
Spatial Structures
基金
“十二五”国家科技支撑计划项目(2011BAJ09B01-01)
贵州省科技合作计划项目(黔科合LH字[2016]7468号)
关键词
剪力键
空腹梁
挠度
简化计算方法
shear connector
vierendeel beam
deflection
simplified calculation method
