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为研发轻质高性能防屈曲支撑(BRB),提出了一种新型横肋约束防屈曲支撑并对其进行了试验研究.对3组BRB试件进行了低周往复加载试验.试件1采用普通Q235钢核心单元,并采用横向加劲肋约束;试件2采用LYP160低屈服点钢核心单元,并采用横向加劲肋约束;试件3采用LYP160低屈服点钢核心单元,并采用砂浆约束.试验结果表明,横向加劲肋可以为核心单元提供足够的侧向刚度,有效抑制核心单元的屈曲.采用LYP160低屈服点钢核心单元的BRB试件比采用普通Q235钢核心单元的BRB试件表现出更好的滞回性能和更强的耗能能力.
In order to develop a lightweight, high-performance buckling brace (BRB), a new type of transverse buckling restrained buckling brace is proposed and tested. Three sets of BRB specimens were subjected to low-cycle reciprocal loading test Ordinary Q235 steel core unit and using lateral stiffener restraint; specimen 2 adopts LYP160 low yield point steel core unit and adopts lateral stiffener restraint; specimen 3 adopts LYP160 low yield point steel core unit and adopts mortar restraint. The results show that the transverse stiffeners can provide sufficient lateral stiffness for the core elements and effectively suppress the buckling of the core elements.The BRB specimens using the LYP160 low yield point steel core unit show more performance than the BRB specimens using the common Q235 steel core unit Good hysteresis performance and more energy-consuming ability.