Analysis Of The Energy Dissipater In Reinforcement Works

Our country is the country that earthquakes are common,All previous earthquake causedheavy casualities and economic loss of property to the structure reinforcemeng design putforward higher request.The traditional strengthening methods take”hard resistance”way,oftenleads to structural member serious damage or even collapse.Dissipative dampingstrengthening methods change “resistance”to”disappear”. In order to protect the safety of themain structure,Adding dampers and energy dissipation device components to it. Thereinforcement method has the vital significance to improve the seismic performance ofstructure.Based on a8degrees area reinforced concrete structure frame as the background whichparameters do not meet the requirements in rarely met earthquake. Seismic strengthening ofthe structure, use ETABS program of finite element software to realize the simulation of theviscous dampers.First of all, set of three groups of different layout of viscous dampers, Input Elcentrowave respectively to three kinds of solution structure and conduct fast nonlinear time historyanalysis, Comparing each scheme of time history analysis results,obtain the followingconclusions, By comparing each damper layout scheme,got the optimal placement of thedampers of the law(Use of viscous dampers speed index is0.3, a single damper output of30tons). When decorate structure overall height, Energy dissipation is49.1%; When upperstructure arrangement, energy dissipation damper is47.8%; When decorate dampers at thebottom of structure,the energy consumption is51.0%, Despite the rate of energy dissipationdamper gap is not big, the difference between damper quantity is bigger (Damper quantity atleast when it layout at the bottom of the structure). Show that dampers decorate the bottom ofthe structure can play a better energy dissipation, At the bottom of the layout is the optimalscheme.Secondly, Choose three kinds of speed index was0.15,0.30and0.60, respectively,Applying three sets of seismic wave (Elcentro wave,Lanzhou wave,Taft wave)for thestructure with three different speed index of the damper, Conducted time history analysis forstructure in the rarely met earthquake, Compared the structure parameters before and afterreinforcement,such as structure’s dynamic characteristics the modal damping energydissipation, energy dissipation damper, interlayer displacement Angle and interlaminarshear.Draw the following conclusions:When a=0.15, the maximum displacement of thesuspension rate respectively reached55.6%,80.1%and51.2%; a=0.30, it was52.2%,74.6%and50.0%; a=0.60,it was48.1%,65.2%and42.0%. It shows that the viscous dampers, withthe increase of speed index of a damper energy consumption decrease, At the same time, verifies the viscous dampers in the structure seismic performance is superior performance.Finally, based on the speed index is more reasonable analysis results give damper, andat the same time get optimal placement of the dampers of the law, provide a reference forsimilar projects.