Experimental Research On The Effects Of Seismic Behavior About Srhc Side Joint With Different Axial Compression Ratios

Steel reinforced high-strength concrete(SRHC) composite structure, as the optimizing combination of composite structure and high-strength concrete structure, not only has the advantages of ordinary steel reinforced concrete structure such as high load-bearing capacity, high rigidity, good seismic behavior, good ductility and high fire-proof performance, but also can reduce the section of the members effectively, enlarge the available space, lighten the weight of the structure, increase the height and span of the building, and improve the unit load-bearing capacity and economic interest. These merits bring the SRHC composite structure more promising in application and have more significance in research.It's illustrated from many earthquake disasters that frame joint is the pivot of load transfer in frames, the important position to ensure the load-bearing capacity and rigidity in structures, and the key spot in seismic buildings. The failure of the joint usually is the main reason that causes the damage of the whole frame. Therefore, widespread attention has been caught on the research of joint both at home and abroad. With the development and application of steel reinforced concrete structure, research on the performance of the joint becomes more and more popular. Due to the complicated load-bearing and constructional detail of the joint and the brittleness of high-strength concrete, the theoretical research of steel reinforced high-strength concrete frame joint falls behind the practical application, and there are still few researches on its seismic behavior both at home and abroad in the present.This paper focuses on the mechanism of crack resistance and shear bearing capacity of SRHC frame joints under low cyclic reversed horizontal load. A detailed description of the test process and a preliminary analysis are given. The seismic behavior of the steel SRHC column-RC beam joints is analyzed. At the same time, the ductility, the energy dissipation capacity, strength deterioration and stiffness deterioration are studied. The theoretic analysis of the steel SRHC column-RC beam joint is presented, and the shear calculating method of the steel SRHC column-RC beam joint core is discussed.