(1 北京市建筑设计研究院有限公司， 北京 100045； 2 清华大学土木工程系， 北京 100084；3 北京市建设工程质量第二检测所有限公司， 北京 100045)

［摘要］介绍了我国20世纪80年代初期建造的装配整体式预应力板柱结构体系的受力特点，以北京市建筑设计研究院有限公司C座科研楼工程为例，对该结构体系的抗震性能进行了评估，根据问题研究了各种加固策略、技术措施，并进行了数值验证，构建了传统抗震加固手段与消能减震技术相结合的抗震加固方法。评估结果表明，20世纪80年代初期建造的装配整体式预应力板柱结构体系在使用40年后，存在整体刚度不足、耗能能力差、水平构件承载力不足、结构竖向安全性得到不保证的问题。针对上述问题，提出了4点加固策略：核心筒周圈剪力墙增设250mm厚钢筋混凝土加强层，柱头增设微型防屈曲支撑，暗梁粘钢补强，板柱连接节点增设钢牛腿。研究结果表明，上述加固措施能够有效提升该结构体系的抗震性能，满足后续使用年限30年的要求。 

［关键词］板柱结构体系；装配整体式；预应力；抗震性能评估；检测鉴定；加固技术

中图分类号：TU378-4 文献标识码：A文章编号：1002-848X(2021)19-0094-07

Research on seismic performance evaluation and strengthening technology of slab-column structural system assembled by monolithic prestressing

CHEN  Xi1, 2, 3 

(1 Beijing Institute of Architectural Design, Beijing 100045， China；2 Department of Civil Engineering, Tsinghua University, Beijing 100084， China；3 Beijing No.2 Testing Institute of Construction Engineering Quality Co., Ltd., Beijing 100045， China) 

Abstract: The mechanical characteristic of slab-column structural system assembled by monolithic prestressing constructed in China in the early 1980s was introduced. Taking the NO.C# scientific research building in Beijing Institute of Architectural Design as an example, the seismic performance of the building was evaluated. Various strengthening strategies, technical measures, and numerical analysis were researched according to the existing problems of this structure. Then, the seismic strengthening scheme, which combined the traditional seismic strengthening with energy dissipation and earthquake-reduction technology, was proposed. The results indicate that the slab-column structural system assembled by monolithic prestressing constructed in China in the early 1980s have various problems after 40 years of service, including the low total stiffness of the structure, the poor capacity of seismic energy dissipation, the low bearing capacity of the horizontal components, and the bad vertical security of the structure. According to the existing problems of the structure, four strengthening methods were proposed: a reinforced concrete surface layer with 250mm thick was added to the core tube; the miniature BRBs were added at the top of the columns; the steels were bonded to the concealed beams; the position of plate-column connection was strengthened by the steel bracket. The seismic calculation and numerical analysis shows that the abovementioned strengthening methods can effectively improve the seismic performance of the structure and meet the requirement of 30 years of subsequent service.

Keywords:slab-column structural system； assembled monolithic； prestress； seismic performance evaluation; inspection and identification; strengthening technology

作者简介：陈曦，硕士，高级工程师，Email: cx8171@126.com。