Mechanics Performance Study Of New Type Of Reinforced Conceret Beam-Rectangular Concrete-filled Tubular Column Connection

Rectangular concrete-filled tubular column possesses great anti-bending and anti-shearing capability and good energy-consuming performance and its shape is regular. It is in favor of beam-column connection and architecture design, so it has good development foreground. Many researches have been researched about Rectangular concrete-filled tubular in and out our country, most focus on performance of rectangular concrete-filled tubular column and design methods. However, the study on connection of rectangular concrete-filled tubular column and reinforced concrete beam is less.In this paper, experiment study, theoretic analysis, FEM program are combined, new type connections of reinforced concrete beam-to- Rectangular concrete-filled tubular column are carried out systems analysis and research. The main contents in this paper are as follows:Firstly, one specimen with 1:3 scale of modeling for the practical project has been tested. The test setup of X-shape has been adopted to realize the cyclic load. The stress-strain principal of connection region steel plates and steel bar has been studied. Additionally, hysteretic curve of joint between column and beam under cyclic loads was plotted and anti-seismic performance of joint has been discussed. The preliminary experimental results indicated that this kind of joint has reliable performance.Secondly, cut different shape grooves on steel plate to improve the bond force between steel plate and concrete. And made the experiment of have different grooves steel plate pull out, get the bond force of different steel plate.Then, According to the APDL in the finite element program of ANSYS, calculating program has been written. Through calculating, the tress-strain principal of connection region steel corbel and reinforcement has been studied. Hysteretic curves of the finite element model were plotted and were compared with the experimental result. The result of finite element indicates that this kind of joint has reliable performance.At last, some conclusions and design recommendations are provided for actual practice, they are very useful for engineering design. This paper plays a basis role of more investigation about new type beam-to-column connections.