Research And Engineeirng Application On Seismic Performance Of Steel Coupling Beams With Buckling-restrained Brace Of Concrete Shear Wall

In the seismic design of the shear wall structure, the coupling beam is curved walllimb in the firstline of defense, play the role of dissipation the level of seismic loading,so it is the joint seismic shear wall key parts of the seismic shear wall. The traditionalcoupling-beams generally have the characteristics of short span, large cross-section,super-reinforced ratio, even the high rigidity is contradictory to good ductility, domesticand foreign scholars focused on the aspect of coupling beam reinforcement in the shearwall, such as: cross-hidden-pillar reinforcement, diamond-shaped reinforcement,polygon-shaped reinforcement, the ductility and energy-dissipating capacity can not beobviously improved by these programs in less use of the current situation, but thedifficulty in construction is increased in the actual project.The paper put forward the configuration form of the steel coupling beam withbuckling-restrained brace which is used in shear wall structure, and the steel couplingbeam still takes truss construction form, meanwhile part members of the truss apply thebuckling-restrained brace, which could be as the stressed bar during the normal usingphase and as a role to play ductility and energy dissipation capacity during the severeearthquakes phase.Firstly, the paper had finished the test and theoretical analysis about the singlebuckling-restrained brace by using the pseudo-static test method, obtained themechanical performance, it is a base for the steel coupling beam withbuckling-restrained brace. Secondly, deformation capacity, hysteresis loop, skeleton linehas received through the pseudo-static test and finite element analysis on the steel trusscoupling beams with buckling-restrained brace, the bearing capacity, and ductility, thenthe energy dissipation and stiffness degradation and so on were understood. It isconcluded that the steel truss coupling beams with buckling-restrained brace ischaracterized by higher bearing capacity, more ductility and better plastic energydissipation capacity by the test and finite element analysis. Thirdly, the test andtheoretical analysis about structural systems of steel truss with the buckling-restrainedbrace has finished using the dynamic elastic-plastic time history analysis method underthe rare earthquake, comparing the floor displacement, velocity, acceleration and totalbasal shear seismic dynamic response with the other coupling beam structure, it wasapparent that all of them have been effectively controlled, and the seismic response of the overall structure has been reduced in this system. The other result also showed that ithas been controlled effectively set merely in the interlayer of bigger displacement anglewith bucking-restrained brace. And then the prospects have been analyzed from theconstruction technology and economy of the system, this kind of structure system is notonly convenient in construction, and also is superiority in the economic aspect. Finally,the research conclusion was summarized. It is effective way in seismic energydissipation that the shear wall structure has the steel coupling beam withbuckling-restrained brace, this is very important for the application of the shear wallstructure in earthquake district.