The mechanism analysis of anti-Seismic performance of concrete-filled steel tube inclined column shear ring-RC ring beam joints

As existing theoretical and experimental study of the joints are not perfect, especially the Seismic performance, it is difficult to make a comprehensive evaluation of the performance of the joints. Besides the formula and structure which are recommended lack of credibility, a number of joints which are not tested by engineering test have been used in the construction. So the buildings' security risk has been increased. In this paper, the insufficient performance of concrete-filled steel tube inclined column shear ring-RC ring beam joints has been paid more attention. The finite element software has been used to make finite element numerical simulation to simulate inclined column shear ring-RC ring beam joints, make analysis of the joints under low cyclic loading and get stress distribution of steel, shear rings and steel. The anti-seismic performances of right cylinder and inclined column which are made up of concrete-filled steel tube have been compared, and the hysteretic curves and skeleton curve of the load of end-column also have been drawn and compared. Through comparing the analysis results and experimental results, some useful and important conclusions have been got.