偏心支撑对竖向不规则结构的抗扭转性能影响研究

The Impact Analysis of Eccentrically Brace for Vertical Irregular Buildings Structure System Torsion Performance

为探究竖向不规则钢框架结构的抗扭转性能以及偏心支撑对其抗扭转性能的影响,建立收进层高度不同的L型竖向不规则钢框架结构并分别在其四周按不同布置方式加设D型偏心支撑,对结构进行抗扭转性能分析对比。结果表明:竖向不规则结构的立面收进层高度越大则下部结构的扭转效应越小、上部结构的扭转效应越大,收进层高度应尽可能地高以提高竖向不规则结构的抗扭转能力;同种偏心支撑的不同布置方式对结构抗扭转性能的提升效果不同,"V字形"布置方式下的总体效果最好。

In order to investigate the torsion resistance of vertical irregular steel frame structures and the influence of eccentric bracing on their torsion resistance,L-shaped vertical irregular steel frame structures in different inlet storey heights with D-shaped eccentric bracing around in different arrangements are built to compare the torsion resistance of them.The results show that the higher the elevation receding floor of the vertical irregular structure,the smaller the torsion effect of the substructure and the larger the torsion effect of the superstructure,The height of the receding layer should be as high as possible to improve the torsion resistance of the vertical irregular structure.Different arrangements of the same kind of eccentric bracing have different effects on the torsion resistance of the superstructure and substructure,and the V-shaped arrangement has the best effect.