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.