The Seismic Analysis Of Qingdao North Railway Station’s Steel Structure Roof

Large span structure has the advantages of light weight,much moremembers,multiple constraints. Generally,people think that this kind of structure has awell seismic performance.The research on seismic performance of this structure isoften ignored,while people focus on the stability analysis of static force and thedynamic response under wind.Because of its complex structure,special dynamiccharacteristics,and be used in railway stations, stadiums and other thickly populatedareas,it will result in serious loss when be destroyed in the earthquake.Therefore,theseismic analysis of large span structure has important practical significance.On the background of Qingdao north railway station’s steel structureroof,different analysis methods are used to research its seismic performance with thefinite element software SAP2000.The principal conclusions are as follows：1. Dynamic characteristics of large span structure are analyzed.The model ofstructure is established with SAP2000,its dynamic properties are understanded afterthe modal analysis of the structure;2. Seismic response analysis of the the structure is conducted by the responsespectrum method and time history method.Considering the influence of the verticalearthquake,in two cases of vertical seismic action input and horizontal and verticalseismic input.Some reference suggestions are provided through the analysis andcomparison of the result.3. The large span structure is added dampers and seismic response analysis isconducted by time history method.By adding additional damper component,contrasting the results of without adding damping member,some valuable suggestionsare put forward on energy dissipation of this structure.