防屈曲支撑加固混凝土框架设计研究

Study on design of concrete frame strengthened with buckling-restrained braces

防屈曲支撑具有普通支撑和耗能元件的双重特点,分析了采用防屈曲支撑加固混凝土框架的特点。同时结合实际工程,从需求分析、支撑的布置和选择、试验构件的性能鉴定、抗震加固前后结果对比这4个方面阐述这种抗震加固方法在工程中的应用。结果表明,通过合理选择防屈曲支撑的布置方案和性能参数,能够实现防屈曲支撑不同阶段的工作状态,确保了防屈曲支撑耗能,从而达到保护主体构件的加固目标。

Buckling-restrained braces（BRB） have characteristics of convention braces and energy dissipated members.The characteristics of concrete frame strengthened with BRB were analyzed.Based on actual engineering,the application of the seismic strengthening method was explained from requirement study,the layout and choice of the BRB,the test appraisal of BRB and the result comparison before and after the application of BRB.The results showed that,by choosing the rational layout and parameters of BRB,the energy dissipated function of BRB was brought out,the main structure members were protected,and the reinforced objective was realized.