江道镨¹，  朱  暾²，  刘文彬¹，  林  坤¹
   （1 福建省建筑科学研究院，福州 350025；2 桂林理工大学土木与建筑工程学院，桂林 541004）

[摘要] 反向加载条件下的粘钢加固能够消除粘钢补强中钢板应力滞后的现象。分析了反向加载下粘钢加固梁的受力机理，并根据平截面假定及应力应变关系，分三种情况分析了粘钢加固梁的相对受压区高度ξ_b，最终得出界限破坏的相对受压区高度公式。
[关键词] 粘钢加固；反向加载；应力应变；相对受压高度
中图分类号：TU375.05    文献标识码：A  文章编号：1002-848X(2012) Sl-0609-03

Analysis of relative compression height in the strengthened beam by epoxy-bonded plate under the opposite side loading condition
Jiang Daopu¹, Zliu Tun², Liu Wenbin¹, Lin Kun¹
(1 Fujian Academy of Building Research, Fuzhou 350025, China; 2 College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China)

Abstract: The method of strengthening by epoxy-bonded plate under the opposite side loading condition will eliminate the lagging stress of steel. The characteristic of bearing load in the strengthened beam was analyzed. According to the assumption of line-linear and the stress-strain relationship, the relative compression height of strengthened beam was discussed in three situations, and the formula of relative compression height in the ultimate load was gotten.
Keywords: strengthened by epoxy-bonded plate; opposite side loading; stress and strain; relative compression height