屈曲约束支撑在某礼堂抗震加固中的应用

Application of buckling restrained braces in seismic strengthening of an auditorium

采用屈曲约束支撑、钢支撑两种加固方案对老旧建筑物进行抗震加固改造,并分别对原结构、屈曲约束支撑加固结构、钢支撑加固结构在地震作用下的的动力特性、楼层刚度比、层间位移角等进行分析和对比。结果表明,采用屈曲约束支撑加固在小震时可有效提高结构的抗侧刚度,中震、大震时可滞回耗能,从而减轻震害,在抗震性能化设计中实现了很好的经济性;可通过选择不同性能的屈曲约束支撑达到不同的抗震性能化需求;屈曲约束支撑加固还有降低结构地震响应,提高结构抗震能力,空间布置灵活、施工简单方便、施工周期短等特点。

Two kinds of reinforcement schemes,buckling restraint support and steel support,were adopted to reinforce and reconstruct the old buildings,and the dynamic characteristics,floor stiffness ratio and interlayer displacement angle of the original structure,buckling restraint support reinforcement structure and steel support reinforcement structure under the action of earthquake were analyzed and compared respectively.The results show that the buckling support can effectively improve the lateral stiffness of the structure in small earthquakes,and hysteretic energy dissipation can be achieved in medium and large earthquakes,so as to reduce the earthquake damage and achieve good economy in seismic performance-based design.Different seismic performance requirements can be achieved by selecting buckling restraint supports with different performance.The buckling restraint support reinforcement has the characteristics of reducing the seismic response of the structure,improving the seismic capability of the structure,flexible spatial arrangement,simple and convenient construction,and short construction period.