胡  凯，储  隽，谢宇峰，瞿  革
    (中船第九设计研究院工程有限公司，上海200063)

[摘要] 工程属于单跨框架结构体系，抗震性能较差，需立即进行加固。考虑到建筑外观及使用功能等要求，采用部分多跨框架的加固方案。通过抗震验算及静力弹塑性分析发现，该加固方案能合理优化结构体系，有效提升结构综合抗震性能，并为今后单跨框架结构的加固设计提供参考。
[关键词] 单跨框架；加固；抗震分析；静力弹塑性分析

    Seismic retrofitting and analysis for a single-span frame structure
    Hu Kai, Chu Jun, Xie Yufeng, Qu Ge
    (China Shipbuilding NRDI Engineering Co., Ltd., Shanghai 200063,  China)

Abstract: This project was a single-span frame structure, with a poor seismic behaviour and needed to be retrofitted. Considering its architectural appearance and using functions, frame columns were decided to be added, for changing it to be a multi-span frame structure. And according to the results of the following seismic checking and Pushover analysis, the reinforcement scheme was proved to promote the structural system and seismic performance effectively. Meanwhile, this paper may also provide some references for related designs in the future.
Keywords: single-span frame structure;  retrofitting;  seismic analysis;  Pushover