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基于钢套筒约束防屈曲支撑的设计理论,给出了适用于螺旋箍筋约束防屈曲支撑的设计方法。设计制作了两种钢芯截面的螺旋箍筋约束防屈曲支撑构件,通过低周往复试验验证设计方法的合理性,研究此类支撑的滞回性能。试验结果表明:按照所建议的设计方法制作的螺旋箍筋约束防屈曲支撑构件具有稳定的滞回耗能性能,可以用于实际工程。
Based on the design theory of restraining buckling brace with steel sleeve, the design method of restraining buckling brace restrained by spiral stirrup is given. Design and fabrication of two kinds of steel-core-sectioned spiral stirrups restrained buckling-restraining members. The rationality of the design method is verified by low-cycle reciprocating tests to study the hysteretic behavior of such supports. The experimental results show that the restrained buckling brace with spiral stirrups restrained according to the proposed design has stable hysteretic energy dissipation and can be used in practical engineering.