李  密^1,2，  朱春明^1,2，  冯  波^1,2
   （1 上海市建筑科学研究院（集团）有限公司，上海 200032；2 上海市工程结构新技术重点实验室，上海 200032）

[摘要] 根据某框架结构加层改造抗震加固实例，指出了防屈曲支撑在某框架结构加层改造抗震加固设计中优势及其布置方法，分析了防屈曲支撑在小震下的刚度贡献和中震及大震情况下的耗能情况，分析结果表明防屈曲支撑在框架结构加层改造抗震加固中具有良好抗震性能。
[关键词] 防屈曲支撑；附加阻尼比；加层改造；抗震加固；层间位移
中图分类号：TU391.9    文献标识码：A  文章编号：1002-848X(2012) Sl-0478-04

Application of buckling-restrained-braces in the seismic strengthening of storey-adding reconstruction of frame structure
Li Mi^1,2,  Zhu Chunming^1,2,  Feng Bo^1,2
(1 Shanghai Research Institute of Building Science( Group)  Co., Ltd., Shanghai 200032, China; 2 Shanghai Key Laboratory of New Technology Research on Engineering Structure, Shanghai 200032, China)

Abstract: The advantage and layout method about buckling-restrained-braces in the seismic strengthening of storey-adding reconstruction of frame structure was pointed out according to the seismic strengthening of storey-adding reconstruction of frame structure in practical engineering. Besides, the stiffness of the buckling-restrained-braces to the structure was analyzed in nunor earthquakes, and energy dissipation was analyzed in medium earthquakes and great earthquakes, which show that the excellent seismic behavior of buckling-restrained-braces in the seismic strengthening of storey-adding reconstruction of frame structure.
Keywords: buckling-restrained-brace; additional damping ratio; storey-adding reconstruction; seismic strengthening; story drift angle