Research On Seismic Performance Of Prefabricated Shear Wall For Dry Construction

With the rapid development of urbanization in China,the society has put forward new demands for economical,efficient,green and energy-saving urban building systems.In the construction and long-term use of traditional urban building systems,the degree of industrialization of design and production is not high,and energy and resource consumption are huge.Urban buildings built under traditional construction techniques and extensive production methods have problems such as long construction period and large environmental pollution,which have been unable to meet the requirements of the urban people's living standards for building quality and function.In order to realize the transformation of urban construction from extensive to intensive,from high energy consumption to superior performance and energy saving ecological type,it is imperative to develop urban industrialized building systems that can realize design standardization,production factoryization,construction mechanization and scientific organization management.Row.The prefabricated structure is a building structure system that is vigorously promoted in China at present.Through industrial prefabrication and on-site installation of industrialized technical means,it avoids the problem of large waste of resources and environmental pollution,and also saves a large amount of labor and greatly exerts industrialization.The advantages of the building have greatly improved the quality of the building.As is k Nown to all,the assembly structure at this stage is mostly based on wet connection nodes,and the assembly rate is low in actual engineering.In order to further improve the assembly rate,simplify the construction process,shorten the construction period and reduce the cost,a full-fit shear wall dry connection method is proposed,which relies on bolt steel bars as the connecting ties and the dry construction method to cut the wall panels.Fast,reliable connection.In this paper,the finite element analysis of the assembled shear wall dry joints with bolted steel bars is carried out,the characteristics of the joints are determined,and the design suggestions are given through the parameter analysis of the system.The main contents of this article are as follows:(1)Using the ABAQUS software to build the assembled concrete shear wall model,the sandwich wall model and the cast-in-place concrete shear wall.The steel bars are embedded in the concrete,and the load beam and the wall are connected by tie,and the nodes are connected.The hard interface of the concrete interface is set,and then the hysteresis curve,bearing capacity,stiffness degradation,ductility coefficient and the difference of cast-in-place concrete shear wall joints of the assembled shear wall dry joints under low-cycle reciprocating load are analyzed.By calculating the relative displacement difference of the leaf wall,the coordinated working performance of the leaf wall is compared with the traditionalsandwich panel.(2)Using ABAQUS software to establish the finite element model of the monolithic wall of fabricated concrete shear wall,and analyzing the hysteresis curve,bearing capacity and stiffness degradation of the fabricated shear-wall dry connection joint under low-cycle reciprocating load.The ductility coefficient,etc.,and the mechanical properties under different axial compression ratios,different dark column sizes,and different numbers of dark columns.Select the optimal parameters of the fabricated concrete shear wall wall.(3)The ABAQUS software was used to establish the model of the fabricated concrete shear wall,and the bearing capacity of the shear bond was calculated by one-way horizontal displacement loading.The optimal parameters of the dark column are obtained by the low-cycle reciprocating load.