Study On Seismic Behavior Of Multi Story Reinforced Concrete Frame Strengthened By Rocking Steel Plate Wall

With the proposal of new seismic design concept,more and more new seismic structures emerge,among which swing structure is a kind of structural system with excellent seismic performance.This kind of structure can reduce the rigidity of the structure by relaxing the bottom connection,realize swing,and realize structural reset and energy consumption by combining with energy dissipation mechanism and reset device.This paper proposes a new type of rocking steel wall structure based on rocking system,which is studied from three aspects: first,the seismic performance of rocking steel wall structure and the influence of different parameter changes on it;second,it is applied to the reinforcement of RC frame to analyze the seismic performance of the whole structure after reinforcement;finally,the design method of rocking steel wall seismic reinforcement is proposed,which is specific The contents are as follows:the rocking steel wall structure is proposed.The specific details are as follows:(1)Comparing the mechanical properties of different structural forms of steel plate wall,choosing the appropriate form of steel plate wall,then deriving the theoretical model of swing steel plate wall,establishing the finite element model of swing steel plate wall,putting forward its simplified analysis model,comparing the model accuracy with numerical simulation;further developing the parameter analysis,discussing the parameters of friction damper,prestressed reinforcement and so on to swing steel plate wall The influence of mechanical properties.The results show that the friction damper in the structure system can dissipate energy and avoid the damage of the main structure;the prestressed reinforcement can make the structure reset and reduce the repair cost after the earthquake.(2)The mechanical model of RC frame sway steel plate wall system is deduced,the finite element model and simplified analysis model of RC frame sway steel plate wall system are established,the influence of parameters of sway steel plate wall on seismic performance of the system is analyzed,and the anti collapse performance of the structure before and after reinforcement is evaluated by incremental dynamic analysis.The analysis results show that the anti collapse ability of the strengthened structure has obviously increased,and the collapse probability has been greatly reduced.(3)The calculation formula of the distribution coefficient of the sway steel plate wall RC frame is established,and the shear distribution law of the steel plate wall layer is fitted.Finally,the seismic design method of RC frame strengthened by rocking steel plate wall is put forward for the purpose of earthquake resistance and recoverable performance.