Papers by Author: Bin Xu

Abstract: The buckling-restrained brace has stable energy dissipation capability. It has been widely used in recent years. This paper uses finite element software ANSYS to do non-linear time history analysis for Center Braced Steel Frame, Eccentrically Braced Steel Frame, Buckling-restrained Braced Steel Frame under the earthquake. The results show that: (1) The peak acceleration, residual displacement and top floor displacement of buckling-restrained braced steel frame is smaller than the other two brace frames, provide support for the structure stability. (2) The damping energy and bracing energy dissipation capability of buckling-restrained braces and eccentrically braced are strong, so it can avoid the collapse of the main structure under the large or medium earthquake.

Abstract: The effect of geometric clearances on the stress and deformation distributions of a wedged-ring joint structure is studied, five cases of dimensional tolerance of each contact surface, i.e., the maximum, minimum, mean of maximum and minimum, mean of maximum and mean, and mean of minimum and mean are investigated, and the probable states that the wedged-rings attach with the upper cylinder or attach with the lower cylinder radially in the assembly process are considered as well. The results of finite element numerical simulations indicate that in the design tolerance zone, the effects of geometric clearances between contact surfaces on the displacement and stress distributions of the structural components are weak. Only when the wedged-rings attach tightly with the upper cylinder or with the lower cylinder, the displacement and stress distributions in the joint of the structure occur a dramatic variation, and the assembly processing measure making the wedged-rings attaching tightly with the lower cylinder can be adopted to effectively decrease the stresses and deformations in the joint of the structure.