Experimental Study On Seismic Behavior Of Exterior Joints Of Integrally Fabricated Steel Reinforced Concrete Frame

Steel Reinforced Concrete (SRC) structure will be one of main structures used inmulti-stories and high buildings in the future. It exploits to the fully steel structure'sand reinforced concrete structure's favorable conditions and avoids unfavorable ones,and makes good use of materials. As it is especially significant to deal with joint'sconnection in multi-stories and high buildings, so in order to ensure bearing capacity,ductility and seismic behavior of joints, which strengthen the core by calculation andconstructional measure generally. Due to the characteristic of SRC structure itself, itcan improve the seismic behavior and ductility of SRC joints through using somejoint shapes in steel structure for reference, which "dog-bone" connection is one kindof it. Therefore, there is certain innovation and exploration to study dog-bone SRCconnection, which possesses vital academic guidance and engineering applicationmeanings.In this paper, the seismic behavior of exterior joints of integrally fabricated steelreinforced concrete (SRC) frame is studied. The tests of them under cyclic loading arecarried out, which are analyzed by the ANSYS 3D nonlinear finite element methodprogram. As well as the paper discusses calculation formulary of dog-bone connectionparameters and design steps of dog-bone SRC connection. The difference of failurepattern, bearing capacity, hysteretic property, ductility, stiffness degradation, energydissipation capacity, rotation of plastic hinge regions and shear deformation of jointcore between the ordinary and dog-bone type joints is investigated and compared. Themechanics behavior of core and the stress transfer mechanism are also researched.The results of this paper indicate: (1) dog-bone exterior joints of the integrallyfabricated steel reinforced concrete (SRC) frame may improve the seismic behavior,mechanics behavior and transfer mechanism;(2) the results of nonlinear finiteelement method program are comparatively closed to the value of experiments, whichshows the modals are reasonable;(3) the design method of dog-bone SRC connectioncan be referred to the designer and editing the code.