Study On The Design And Seismic Performance Of New Fully Assembled Frame-Shear Structure

At present,prefabricated structure is an important way to achieve the "double carbon goal" and complete the industrialization of buildings.As a more commonly used structural system for high-rise buildings,the relevant regulations still recommend the "cast-in-place" method of shear walls in prefabricated frame-shear structures,which is not conducive to achieving the above goals.Therefore,how to develop a fully assembled frame-shear structure with excellent seismic performance and efficient assembly has become an urgent social demand.Based on the seismic performance test and theoretical analysis of the new prefabricated shear wall structure in the early stage of the research group,a new type of fully assembled frame-shear structure is further proposed,which realizes the equivalent cast-in-situ function under the action of small and medium-sized earthquakes and a large amount of energy consumption during large earthquakes.Specifically,the connection scheme design of each assembly component was completed,and the goal of efficient full assembly was achieved;While ensuring that the structure has sufficient bearing capacity,it effectively improves its seismic performance.After that,a layer of the new fully assembled frame-shear structure model was established through ABAQUS,and the corresponding single-push performance and low-cycle reciprocating seismic performance were analyzed.The specific research content is as follows:(1)Based on the theory of frictional energy dissipation,the research group proposed a new prefabricated shear wall structure with friction and energy dissipation function.The corresponding seismic performance test is completed for this wall,and the results show that the designed new prefabricated shear wall structure has good bearing capacity and excellent energy dissipation capacity,and also shows that this design idea and method can be applied to the prefabricated structure.(2)Based on the above test results,the design ideas and concepts are further extended to the frame-shear structure,and a new fully assembled frame-shear structure composed of horizontal connection device,beam and column articulation device,beam and column corner limit device,etc.is designed according to literature,specifications and related frame-shear structure design methods.(3)ABAQUS software is used to establish the proposed new fully assembled frame-shear structure model,and the ABAQUS finite element modeling method of each assembly component(horizontal connection device,beam and column articulation device and corner limit energy dissipation device)is discussed,and the key points that need to be paid attention to when establishing interaction and meshing of each component in the modeling process are analyzed.(4)The single-push performance loading study of the new fully assembled frame-shear structure model is carried out,and the results show that the new fully assembled frame-shear structure will not fail before the main structure,and the ultimate bearing capacity of the structure is comparable to that of cast-in-place frame-shear structure,and the failure form is basically the same as that of the traditional cast-in-place frame-shear structure.(5)For the new fully assembled frame-shear structure model,the low-cycle reciprocating loading of the structure under the change of bolt preload force of different axial compression ratios and connecting devices was carried out,and the corresponding structural bearing capacity characteristic values were obtained.The influence of different parameters on its seismic performance was analyzed.The results show that the new fully assembled frame-shear structure designed has sufficient bearing capacity and excellent seismic performance.