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以螺旋箍筋混凝土作为支撑外包约束,设计屈曲约束支撑。通过底周期反复荷载轴向加载试验,研究了Q235钢2种截面、两种螺旋箍筋间距、两种工作段长度的6个防屈曲支撑的力-位移滞回曲线以及支撑需要完善的设计细节。试验与分析表明,试件构造设计合理,耗能性能理想,延性、塑形良好,满足抗震设计要求,适合推广。
The spiral stirrup reinforced concrete is used as the support outsourcing constraint, and the buckling restrained support is designed. The force-displacement hysteretic curves of six anti-buckling braces of Q235 steel and two kinds of helical stirrups, the lengths of the two work sections, and the details of the design needed to be supported are studied by axial loading tests of bottom cycle repeated loads. . The test and analysis show that the specimen structure is reasonable in design, ideal in energy dissipation, good in ductility and shape, meeting the seismic design requirements and suitable for popularization.