Research On Damping Performance On Steel Structure Add With Viscoelastic Dampers

At present,the development and application of high-rise steel structure building is becoming more and more mature,but the requirement of people for the seismic performance of the building is more and more high.In recent years,the damping control technology has been widely studied and applied in domestic and abroad,in which the viscoelastic damper for vibration control of the structure has obvious technical advantages compared with the traditional seismic method.The engineering practice shows that the rational use of vibration control technology can effectively improve the seismic performance of the structure.The damper is divided into general related to speed,displacement type and other types,the energy dissipation effect also has significant differences.This paper aims to study the layout of high-rise steel frame with viscoelastic dampers for vibration control of structures,and to study the number and layout method of the damper.This paper introduces the high-rise steel frame structure and the development situation of viscoelastic dampers.Through the theoretical study and research,choosing appropriate structure model and the parameters of damper,restoring force model and parameters.And by using the finite element software SAP2000 for an office building in modal analysis,response spectrum analysis and elastic time history analysis and rare case of nonlinear seismic time history analysis under etc.This paper analyzes the seismic performance of high-rise steel frame structure with viscoelastic dampers.The main contents are as follows:SAP2000 to build high-rise steel frame structure model used in this article,respectively,in the earthquake,to support and support the two high-rise steel frame model for modal analysis and response spectrum analysis,the support structure for better performance by comparison.(1)By using the software SAP2000 to build high-rise steel frame structure model,analyse modal analysis and response spectrum analysis of the model with support and without support under the action of earthquake.The support structure has better performance by comparison.(2)by setting the viscoelastic damper with different number in addition to(3)supporting model,application of nonlinear time history method,the damping effect of the damper number of different structures.(4)In accordance with the "uniform and symmetrical,dispersion,around the general principles".(5)According to the analysis results of displacement and other indicators to select the better arrangement mode.By changing the arrangement mode of the damper to compare the damping,to obtain the better arrangement.Analysis of shock absorption effect under the action of rare earthquake using nonlinear direct integration time history analysis method.