STS新管幕对地铁车站结构地震响应影响分析

Analysis on the Influence of Steel Tube Slab on the Seismic Response of the Subway Station Structure

为实现STS新管幕对地铁车站结构地震响应影响分析,以沈阳地铁十号线东北大马路站为工程背景,应用Midas-GTS软件,研究了在不同加速度强度的地震作用下,有STS新管幕和无STS新管幕地铁车站结构的地震响应变化规律。结果显示:在地震作用下,由于STS新管幕结构的存在,减小了车站结构的弯矩、位移及加速度,从而减小了地铁车站的变形,对抗震结果有利。地铁车站衬砌的连接部位特别是柱顶受地震强度影响较大,是地铁车站抗震的薄弱环节。STS新管幕结构对地铁车站抗震的影响规律与衬砌强度增加对地下结构抗震的影响规律相一致。研究可为沈阳地区地铁车站抗震研究及工程应用提供支撑。

In order to realize the analysis of the influence of STS(Steel Tube Slab)on the seismic response of the subway station structure,Dongbei Damalu Subway Station is used as the background.The seismic response change rule of the subway station structure with STS structure and without STS structure under different seismic acceleration levels are analyzed using Midas-GTS software.The results show that under the action of earthquake the bending moment,displacement,and acceleration of the station structure are reduced under earthquake because of STS structure.STS(Steel Tube Slab)structure can increase lining strength,and reduce deformation of the subway station,which is beneficial to the seismic results.Connecting parts of the lining of subway station especially the top of the column are affected intensively by the earthquake,which is a weak link of the subway station under seismic.The influence of STS structure on the earthquake resistance of subway station conforms to the influence of the increase of lining strength on the seismic resistance of underground structures.The research can provide support for the seismic research and engineering application of subway stations in Shenyang area.