地震作用下钢楼梯对钢框架结构抗震性能影响研究

The Influence of the Steel Stairs Under the Seismic Performance Analysis of Steel Frame Structure

随着钢结构在现代建筑的广泛应用,人们往往忽略了地震作用下钢结构楼梯在钢框架结构体系中的影响。为了探究钢楼梯对钢框架结构抗震性能的影响,本文利用大型有限元分析软件ETABS建立计算模型,选择主要的控制参数结构周期、位移角、底层剪力和楼梯受力作为研究对象。计算分析表明,钢结构楼梯对整体钢框架结构提供了一定的刚度,在地震作用下,应将钢楼梯的"释放效应"理念应用到未来钢结构抗震设计概念中,以此达到抗震性能设计要求。

As the steel structure is widely used in modern tall buildings, we are usually likely to neglect the influence of steel stairs on the aseismatic performance of steel structure. In or-der to detect the influence, this paper has set up a calculation model by ETABS, a mass finite element analysis software, and compared the force of stairs with some main control parameters such as structure period, displacement, angle and bottom shear. The results of analysis show that steel stairs have certain help to the stiffness of steel structure. Under the effect of earth-quakes, the resistance concept of steel stairs should be trans-formed into release effect concept which will be applied into the steel construction of future buildings to meet the need of aseis-matic performance.