Yield Mechanisms And Energy Dissipation Analysis Of Steel Coupled-beam With Buckling-restrained Brace Of Concrete Shear Walls

The high-rise building is developed along with the economic development and the people's living need.The shear wall structure is the most widely used in the high-rise building structural design.Considering the building function,the joint wall is the most typical form of shear wall system.In the earthquake-resistant structural system,shear wall plays an important role in earthquake resistance.Coupling beams in the joint-wall are the first line of defense for shear-wall structure,which is the key factor to the seismic performance of shear wall structure.The beam can play a key role in energy consumption.The domestic scholar Prof.Weidong Sun has proposed a new type of coupling beam with the consideration of improving the energy dissipation capacity of the coupling beam and the ease of maintenance after the earthquake.Wall to form a new type of hybrid joint wall system.In this paper,the energy dissipation capacity of the new yielding mechanism of the jointed beam with anti-buckling support is studied.According to the design method and layout principle of reinforced concrete connecting beam with buckling-resisting support,the reinforced concrete connecting beam is replaced by some reinforced concrete connecting beam in the model of reinforced concrete coupling beam.Concrete coupling beam and buckling-supported steel connecting beam structure model,and using the finite element analysis software Midas gen of building structure to analyze the static elastic-plastic analysis of the two models,the results show that the reinforced concrete coupling beam and the structural model yield mechanism belongs to the overall yielding mechanism.Under the same rare earthquakes,there are more safety reserves than the reinforced concrete coupling beam structure model,which can effectively reduce the plastic damage of the whole structure.In order to avoid the problems of super-bars over-limit and reduce the difficulty of post-earthquake maintenance,the structural model of reinforced concrete coupling beam is established,and the static steel-plastic analysis is carried out,and the local steel braces are replaced by flexural buckling The results show that the yielding order of the jointed beam with buckling-resistant steel-reinforced composite beam follows the support-coupling beam-wall leg,and has good energy-dissipating ability.The results show that the yield-bearing capacity of the steel-.Finally,the energy dissipation capacity of the structural model is analyzed by using the time history analysis method and the energy analysis method.The nonlinear dynamic time history analysis of the structural model is carried out by using the YJK program.Compared with the reinforced concrete coupling beam structure model,the ordinary steel truss coupling beam structure The results show that the energy dissipationof steel beams with ordinary steel trussed beams and buckling-supported steel beams is much smaller than that of steel-reinforced concrete beams with the same total energy inputted to the structure.Beam structure and the ordinary steel truss joint structure of the plastic energy dissipation,with anti-buckling support steel beam system has a good hysteretic energy dissipation capacity,anti-buckling support through its own yield energy,can effectively reduce the other components of the plastic structure damage,to ensure the main structure of security,to prevent the collapse of the overall structure.