| The Buckling-Restrained Brace is a structural brace element consisting of a steel core plate surrounded by mortar and enclosed in a steel tube. This ingenious combination of components produces a seismic structural element with stable and symmetric tension-compression hysteretic behaviours. They usually consist of a steel core undergoing significant inelastic deformation when subjected to strong earthquake loads and a casing for restraining global and local buckling of the core element. But there are also have separation unit between core braces and buckling-restraining units, which ensures the brace can slide freely inside the buckling-restraining unit and that transverse expansion of the brace can take place when the brace yields in compression is of great importance. This typically requires some un-bonded material to be used as the separation unit.The researches of these kinds of component are all focus on the frames but few on the large span structure, this paper are research the affection of vibration reducing base on the research of it on frame.The main content in this paper are as follows:(1) To offer the reference for the arrangement of BRBs, it must research the seismic vibration of the Reticular domes first.(2) The affect of seismic vibration reduced are been get by research the structure with BRBs which are been acted by three single direction seismic waves and three directions seismic waves, and get the best arrangement of BRBs to the structure of each form wave.(3) The research of the paper is focus on the two kinds of section forms ------pipesection and stick section, and compare the affection of seismic vibration reduced of this two kinds sections to get possibility of the stick section BRBs be applied on large span structure.(4) To research the different affection of seismic vibration reduced of different rise-span ratio of structure , different size of the section of BRBs and different yield strength of BRBs , and then can offer some advices for the applied of BRBs.
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