In order to study the hysteresis and seismic control performance of the buckling restrained brace(BRB)with LY160 steel core,the material test of LY160 was designed,the cyclic test and structural seismic response analysis of the buckling restrained brace were carried out.Firstly,the material test of LY160 was finished,the average yield strength of LY160 steel is 170MPa,and the fracture elongation is 48.2％.Secondly,the cyclic test of BRB shows the ductility coefficient is 17 with the 1/45L loading displacement.Finally,a six-story reinforced concrete frame structure was established for time-history response analysis,and the seismic response of the original structure,the structure with normal buckling restrained brace(NBRB)and the structure with low-yield-point buckling restrained brace(LBRB)of LY160 as the core material were analyzed and compared.The results show that the damping ratio of LBRB is improved by 25％compared with that of NBRB,and the LBRB controls the plastic damage under rare earthquakes.More importantly,the BRB with low yield point steel core can effectively improve the safety of structure.
关键词
屈曲约束支撑/国产低屈服点芯材/材性试验/循环往复试验/地震响应分析
Key words
BRB/domestic low yield point material/material characteristic test/cyclic test/seismic response analysis
维普
万方数据