地震作用下楼梯对框架结构抗震性能的影响

Influence of Stairs on Seismic Performance of Frame Structures under Earthquake

为研究地震时楼梯对框架结构的受力性能和破坏形态有怎样的的影响,现使用有限元软件建立钢筋混凝土框架结构模型,研究结构的自振特性、内力变化、结构变形等。结果表明,结构在受到的水平地震作用时层间剪力和楼层变形有所增大,且对结构整体抗扭转性能有明显提高,即楼梯的设置对结构抗震有利。考虑楼梯的抗震表现,应对楼梯进行特殊加强以保证地震时楼梯的安全通畅。

In order to study the influence of stairs on the mechanical behavior and failure mode of the frame structure during the earthquake,the finite element software is used to establish the reinforced concrete frame structure model,and the self-vibration characteristics,internal force changes and structural deformation of the structure are studied.The results show that the inter-layer shear force and floor deformation increase when the structure is subjected to horizontal earthquakes,and the overall anti-torsion performance of the structure is obviously improved,that is,the setting of the stairs is beneficial to the structure.Considering the seismic performance of the stairs,the stairs should be specially strengthened to ensure the safety of the stairs during the earthquake.