| This thesis introduces detailed the experiment of RC frame structure beam-column internal joints strengthened by gluing steels suffered low frequency cyclic load about the experiment design,the experiment process and results. Through analyzing the failure forms,hysteretic curves and the strain of bars,concrete and steels of five full-scale samples, we draws the conclusion of the bonding steels have improved the carrying capacity and the ductility of joints sticky-steel.The study emphasizes on the deformation behavior of RC frame structure beam-column internal joints strengthened by gluing steels. The deformation of frame joints is made up of the bend deformation and the shearing deformation of the key part (plastic hinge area of beam and column),the slipping of beam bars,the joint core shearing deformation. We propose the calculation formula for beam displacement of RC frame structure beam-column internal joints after discussing the beam displacement produced by above deformations one by one. The ductility,the rigidity and the energy consumption of joint identify the seismic capacity of frame joint. Contrasting samples strengthened by gluing steels and other samples, the former have good ductility and energy consumption capacity, achieving the requirement of "strong column weak beam","strong joint weak components". At last, the paper analyzes the mechanics performance of RC frame structure beam-column internal joints and discusses the befitting form and crack resistance of joints strengthened by bending steels. The calculation formula for crack resistance of the strengthened joint is proposed.
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