(1 中国建筑科学研究院，北京 100013； 2 北京工业大学，北京 100022)

［摘要］当设计的结构构件截面高度过大不能满足建筑使用要求必须减小梁截面时，就需要对结构构件进行改造加固。针对要改造的梁截面减小较多，而且承受较大荷载的特点，采用组合梁的方法加固，用型钢梁来分担由于原混凝土梁截面减小所需增加的配筋和刚度。组合梁容易使被改造的梁满足建筑使用功能的要求，同时大大降低了支撑卸荷所需的费用，也使施工过程更安全可控。该加固方法较好地解决了重荷载梁改造加固的需求，可为类似工程的加固改造提供参考。

［关键词］加固改造; 重荷载; 大截面梁; 组合梁; 构造措施

中图分类号：TU398+.7        文献标识码：A        文章编号：1002-848X(2014)03-0063-04

Application of composite beam in reinforcement projects

Rong Weisheng1,  Hui Yuerong1,  Zhang Jie2,  Li Yongjie1

 (1 China Academy of Building Research, Beijing 100013, China; 2 Beijing University of Technology, Beijing 100022, China)

Abstract: When the height of the component section is too large to fulfill the requirements of architecture, structural components need to be reinforced and reconstructed. According to the characteristics that the beam section needed to be reduce a lot and bears great loads, the composite beam reinforcement method was used, in which steel beams were used to share the increased reinforcement and stiffness due to reduction of section. Composite beam is easy to meet the functional requirements of building use and greatly reduce costs for unloading support. At the same time, construction process is more safe and controllable with the use of the method. The reinforcement method solves the problem of reinforcement requirements of beams under heavy loads, and provide reference for reinforcement and reconstruction of similar projects.

Keywords: reinforcement and reconstruction; heavy load; large section beam; composite beam; structural measure

作者简介：荣维生，博士，高级工程师，Email：rongweisheng@sina.com。

参考文献

［1］GB 50367—2006 混凝土结构加固技术规范［S］．北京：中国建筑工业出版社，2006.

［2］YB 9082—2006 钢骨混凝土结构设计规程［S］．北京：冶金工业出版社，2007.