Analysis And Design Of Seismic Performance Of Prefabricated Structures Based On Plug And Play Dampers

Prefabricated structure is an important way of building industrialization.Wi th its advantages of less labor demand,green construction,shorter construction period and higher production efficiency,it has become the main trend of buildi ng structure development in the future in recent years and has better developm ent prospects and social benefits.However,the unpredictability of earthquakes often poses a serious crisis to prefabricated frame structures,so the " insufficie nt seismic performance of joints" of prefabricated frame structures is the core i ssue restricting the development of prefabricated systems.Energy dissipation an d shock absorption technology is a measure that can effectively improve the se ismic performance of prefabricated structures and reduce the structural dynamic response under earthquake action.In this paper,two kinds of plug-and-play dampers are designed,namely pl ug-and-play support devices suitable for assembled frame structures and displac ement fan dampers,and a new prefabricated energy dissipation and shock abso rption frame system is proposed.The finite element software SAP 2000 was us ed to model the prefabricated frame structure.Through nonlinear time history a nalysis,the energy dissipation performance of plug-and-play support device and displacement fan damper,as well as the energy dissipation performance of the combined structure of the two energy dissipation devices,were verified,provi ding a reference for future research on seismic performance of prefabricated joi nts.The main research contents are as follows:1.The plug-and-play support device is designed,and the impact of plug-a nd-play support device on the seismic performance of prefabricated frame struct ures with different floors is analyzed through theoretical calculation and finite element software SAP 2000 modeling.2.Design a large displacement fan damper,combine the lever displacemen t amplifier with the common fan damper,study and analyze the amplification mechanism of the displacement amplifier,model and analyze the prefabricated structure with the large displacement fan damper,and discuss the difference of the impact of the large displacement fan damper and the common fan damper on the seismic performance of the prefabricated frame structure under the acti on of small and medium earthquakes.3.A new prefabricated energy dissipation frame system is proposed,which is composed of plug-and-play support device and large displacement fan damp er.According to a practical prefabricated project in Qingdao,SAP 2000 finite element software was used to model the original prefabricated structure,comm on steel support structure,plug-and-play support energy dissipation structure,lar ge displacement fan damper energy dissipation structure and two energy dissipa tion device combination energy dissipation structures.4.The nonlinear finite element simulation analysis of the above two non-e nergy dissipation structures and three energy dissipation structures under fortific ation and rare earthquake waves is carried out,and the seismic response result s of displacement,acceleration and base shear of five different structural syste ms are discussed.The seismic performance differences between the non-energy dissipation structure and the energy dissipation structure are compared and anal yzed,and the seismic performance differences between the single energy dissip ation structure and the combined energy dissipation structure are compared and analyzed.Finally,it is concluded that the seismic performance of the new pre fabricated energy dissipation frame system is the best.