（浙江绿城建筑设计有限公司， 杭州 310007）

［摘要］叠合加固技术重点是叠合面的粘结性能，决定了后浇混凝土与既有结构能否很好地共同工作。结合实际工程，从混凝土材料微观结构和宏观力学性能出发，分析了叠合结构叠合面粘结性能的主要影响因素，探讨了一种既有大跨结构梁顶部叠合加固思路，对工程实际应用具有指导作用。

［关键词］叠合加固技术； 既有大跨结构； 叠合面抗剪； 粘结性能； 界面处理

中图分类号：TU973-2文献标识码：A文章编号：1002-848X(2017)09-0028-05

Application of composite strengthening technology in the renovation of existing large span structures

Wu Yingdong, Fang Xunke, Hu Di, Wu Xuefeng, Zhu Wei

(Zhejiang Greenton Architectural Design Co., Ltd., Hangzhou 310007, China)

Abstract:The adhesive property of the combined interface is always the key in the composite strengthening technology, it determines whether the post cast concrete and the existing structure can work well together. Combined with practical engineering, started from the micro structure and macro mechanical properties of concrete materials, the main factors affecting the adhesive property of the combined interface in the composite structure were analyzed. An idea of composite strengthening on the top of existing large span structure was discussed, and it will be of guiding value in practical engineering.

Keywords:composite strengthening technology； existing large span structure； anti-shear in the combined interface； adhesive property； interface treatment

作者简介：吴映栋，硕士，结构设计总监，高级工程师，一级注册结构工程师，Email:wuyingdong@gad.com.cn。