Seismic Response Analysis of Buckling Restrained Frames

Abstract

The frame structure system uses additional buckling restraint support, which greatly improves the shear strength and lateral stiffness of the entire structure, and plays a positive role in reducing the displacement between layers and the overall displacement of the structure. When the additional buckling restraint support is used in the frame, the hysteresis curve of the system is fuller, which greatly improves the energy consumption capacity of the structure. The descending section of the stent skeleton line breaks through the traditional limitations, and its descending degree slows down as the displacement increases. The lateral stiffness of a buckling restrained frame is poor, and usually requires large beam and column sections to meet the requirements. Under the action of earthquakes, the support of buckling restrained frames is prone to buckling and instability, resulting in a sharp decline in its seismic resistance. The purpose of this paper is to analyze the seismic response of buckling-restrained frames. In terms of methods, this article mainly starts from the design method and principles of buckling restrained braced steel frame, and then designs and discusses the buckled restrained braced steel frame. Then it designs the BRB size and uses the Perform-3d software to build a nonlinear structural model. Use time history analysis to analyze some possible problems in the building. In terms of experiments, this paper mainly analyzes the seismic response of a building, and introduces the situation of the building and its analysis in terms of earthquake prevention. From the four strong earthquake records recorded in this paper, it can be seen that the maximum value of the seismic acceleration time history increases with the increase of the earthquake intensity. And the earthquake impact of rare earthquakes will be greater than that of more frequent earthquakes under the same intensity. From the data of structural analysis, the period of the original structure is greater than the period of the BRB structure under the same mode shape. As the mode shape increases, the period difference decreases and converges.