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   江道鐠¹，  朱  暾²，  劉文彬¹，  林  坤¹
   （1 福建省建筑科學(xué)研究院，福州 350025；2 桂林理工大學(xué)土木與建筑工程學(xué)院，桂林 541004）

[摘要] 反向加載條件下的粘鋼加固能夠消除粘鋼補強中鋼板應(yīng)力滯后的現(xiàn)象。分析了反向加載下粘鋼加固梁的受力機理，并根據(jù)平截面假定及應(yīng)力應(yīng)變關(guān)系，分三種情況分析了粘鋼加固梁的相對受壓區(qū)高度ξ_b，最終得出界限破壞的相對受壓區(qū)高度公式。
[關(guān)鍵詞] 粘鋼加固；反向加載；應(yīng)力應(yīng)變；相對受壓高度
中圖分類號：TU375.05    文獻(xiàn)標(biāo)識碼：A  文章編號：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