基于变形的防屈曲支撑在既有建筑抗震加固中的应用研究

Research on the application of seismic strengthening technology with buckling-restrained braces based on displacement in the existing building

总结了防屈曲约束支撑结构设计方法,引入位移性能指标,提出支撑在既有建筑抗震加固中的设计流程。结合一幢6层既有综合楼进行了实例分析,并通过弹塑性时程分析予以数值验证。结果表明,基于位移性能设计方法能够快速进行支撑用量估计,在中震和大震下减震效果与非线性时程分析结果基本一致。

A seismic strengthening method with buckling-restrained braces was reviewed.Index based on displacement performance was introduced.The design procedure with BRB was suggested.The method was applied to strengthen a sixstory existing building.The results of nonlinear time history analysis were compared to results of the method based on displacement performance.The results prove that design of BRB is feasible and the energy dissipation under moderate earthquake and severe earthquake is similar with that of nonlinear time history analysis.