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使用屈曲约束支撑(Buckling-Restrained Brace,BRB)及T形截面钢框架对单跨足尺的弱柱强梁钢筋混凝土(Reinforced Concrete,RC)框架进行补强,并在框架4个角落浇置水泥砂浆承压块,以有效传递斜撑力量。该研究包括两个BRB框架补强的RC框架试件,试验结果显示,利用BRB框架补强可使整体框架变形持续成长至3%rad楼层侧位移角,整体框架抗侧承载力约为纯RC框架的2.6倍,且持续变形至5%rad楼层侧位移角时,BRB核心才发生断裂。试验结果亦显示,该研究补强方式能有效提高原有RC结构的抗侧承载力、刚度和韧性,并借助BRB消散大部份的能量。
Buckling-Restrained Brace (BRB) and T-section steel frame are used to reinforce the single-span full-length reinforced concrete frame with reinforced concrete (RC) frame, and four frames of cement mortar Pressure block, in order to effectively transfer diagonal brace strength. The study includes two RC frame specimens reinforced with BRB frames. The experimental results show that the deformation of the whole frame can be continued to grow up to 3% rad floor displacement angle by using the BRB frame reinforcement. The lateral resistance of the whole frame is about pure RC 2.6 times the frame, and continue to deform to 5% rad floor displacement angle, the BRB core fracture occurred. The test results also show that the reinforcement method can effectively improve the anti-side bearing capacity, stiffness and toughness of the original RC structure and dissipate most of the energy with BRB.