Seismic And Isolation Performance Analysis Of Concrete Perforated Shear Wall Modular Structure

In recent years,the government vigorously promotes prefabricated building,which has become an inevitable choice for the transformation and development of the construction industry because of its green construction method and greatly shortened construction cycle.In the process of promoting housing industrialization,the prefabricated building system is constantly improved,and modular building has become an effective way to realize housing industrialization.In this context,the research of modular structure is greatly increased,but mainly concentrated in steel structure modular building,and for concrete modular building,the research is less,and this kind of structure has been built mainly in non-seismic fortification areas,restricted by its own seismic performance,it is less applied in areas with high fortification intensity.In order to improve the seismic performance of the modular structure,the bottom isolation method can be used to reduce the seismic action without changing the design of the upper structure module.Therefore,this paper focuses on the concrete modular structure,studies its structural connection and resistance to rare and very-rare earthquakes,and combines with the new super-large displacement friction pendulum bearing proposed by our research group to improve the seismic performance of the modular structure.The main contents of this paper are as follows:(1)A kind of concrete perforated shear wall module is proposed,which is composed of modular structure.For single-layer modular structure,finite element software is used for monotonic pushover analysis and low cycle reciprocating analysis to analyze the bearing capacity,ductility and energy dissipation capacity of modules and connecting members;Compared with different connection forms,based on the characteristics of modular structure form and concrete shear wall modular structure in practical engineering application,the reasonable modeling method is determined for subsequent research.(2)Compared with the same plane layout of concrete perforated shear wall modular structure,composite modular structure with frame and traditional frame structure,nonlinear dynamic analysis is used to compare the story displacement and connecting member stress of the structure under the design rare earthquake,so as to determine the anti rare earthquake performance of different structures.(3)In order to make the modular structure have the performance of resisting rare earthquake or even very-rare earthquake,the modular structure is combined with a new type of isolation bearing,the combined super-large displacement friction pendulum bearing.The mechanical properties of the combined super-large displacement friction pendulum bearing are analyzed.The hysteretic model is used to simulate the displacement and isolation period of the isolation bearing under different PGA seismic conditions in the shaking table test of the isolation bearing.The accuracy of the hysteretic model is verified,and the simulation method is applied to the subsequent Research of modular isolation structure.(4)The modular structure of concrete perforated shear wall,composite structure with frame and traditional frame structure are designed.The maximum displacement and residual displacement of isolation layer,the inter story displacement of superstructure and the friction coefficient of isolation bearing are studied under rare earthquake and very-rare earthquake by selecting appropriate radius and friction coefficient of isolation bearing The isolation performance was compared.