Study On The Performance Of A New Type Of Steel-reinforced Beam-column Joint

Nowadays,the application of assembly structure in our country has become more and more widespread.Among them,the assembled steel structure building plays an important role in the trend of building industrialization,mainly because of its light weight,low cost of foundation,suitable for soft foundation,fast construction,good seismic performance,recyclable and other characteristics.As the most important part of steel structure,beam-column joints have become a hot topic for scholars.In this paper,a new type of steel-reinforced beam-column joint is proposed on the basis of fully understanding the current situation of the development of assembly structure in the construction industry and drawing on the design of beam-column joints of various types of assembly structure scientifically and reasonably.The energy dissipation and self-resetting of the joints can be both considered,in which the energy dissipation is mainly borne by angle steel,bolts and Prestressed steel bar,while the self-resetting performance is guaranteed by rubber pads and prestressing reinforcement.In order to study the seismic performance of the new type joints,nine beam-column joint models based on different parameters were established by using finite element analysis software ABAQUS.The main parameters include the thickness of rubber pad,the strength of angle steel,the initial prestressing value of prestressing reinforcement and bolt diameters indirectly affecting the ratio of bolts to prestressing tendons bearing bending moments.By analyzing the destructive performance,hysteretic curve,skeleton curve and energy dissipation capacity of the joint model,the mechanism of the joint is clarified and verified,and the influence rules of each parameter on the seismic performance of the joint are summarized as follows : rubber pads and prestressing values can optimize the working performance of joints under certain conditions;the change of angle steel strength has little influence on the working performance of the model;the ratio of bolt to prestressing reinforcement bearing bending moment has great influence on the joints;The research shows that the new type of joints have good seismic performance and can be applied to assembled structures.