许曙东，冯  博
    （广东福银预应力新技术发展有限公司北京分公司，北京100085）

[摘要] 体外预应力技术作为一种主动加固方法，相对其他粘钢、碳纤维等被动加固方法，可以有效、主动地改善结构受力性能，提高结构极限承载力和刚度，减少变形和裂缝。主要介绍了体外预应力技术在房屋建筑加固改造中的四个典型工程案例中的应用，分别为双向框架梁加固、楼板加固、预应力梁加固、框架抽柱加固技术。
[关键词] 体外预应力；加固；改造；框架梁；楼板

    Application of the external prestressing in reinforcement and reconstruction project
    Xu Shudong,  Feng Bo
    (Guangdong Fuyin Prestress New-technology Ltd., Co., Beijing 100085, China)

Abstract: As an active reinforcement method, the external prestressing technique can effectively improve the mechanical performance, stiffness and ultimate bearing capacity of the structure. The applications of the external prestressing technique in four typical projects were introduced.
Keywords: external prestressing; reinforcement; reconstruction; frame beam; floor