- 摘 要
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（1 蘇州方正工程技術(shù)開發(fā)檢測有限公司， 蘇州 215152； 2 蘇州科技大學(xué)土木工程學(xué)院， 蘇州 215011）
［摘要］相較于傳統(tǒng)的現(xiàn)澆梁，用水泥基灌漿料增大截面法加固的梁的破壞機理和開裂模型發(fā)生了變化。經(jīng)典的鋼筋混凝土結(jié)構(gòu)理論已不能完全適用于加固梁的性能分析。為了研究加固梁的破壞機理和開裂模型，對3根水泥基灌漿料加固的鋼筋混凝土梁進行試驗研究。通過研究發(fā)現(xiàn)，用水泥基灌漿料加固后梁的開裂承載力相較于加固前提高5~7倍，由此提出了水泥基灌漿料加固梁基于桁架模型的開裂破壞模型理論，很好地解釋了水泥基灌漿料加固梁開裂破壞的作用機理。
［關(guān)鍵詞］水泥基灌漿料； 加固； 桁架； 破壞機理
中圖分類號：375-1文獻標(biāo)識碼：A文章編號：1002-848X(2017)15-0080-05
Experimental research and cracking model analysis on cement-based grouting material reinforcement beam
Li Zuhui1, Tian Shizhu2, Ding Shuangshuang1
(1 Suzhou Fangzheng Engineering Technology Development Testing Co., Ltd., Suzhou 215152, China; 2 School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China)
Abstract:Compared with the traditional cast-in-situ beam, the failure mechanism and crack model of the beam strengthened by enlarging cross-section method with cement\|based grouting material have changed. The classical theory of reinforced concrete structures cannot be fully applied to the performance analysis of reinforced beams. In order to study the failure mechanism and crack model of reinforced beams, three reinforced concrete beams strengthened with cement-based grouting material were experimented. Through the study, it is found that cracking bearing capacity of beams strengthened with cement-based grouting material increases 5~7 times than that of beams before the reinforcement. The theory of cracking failure model of cement-based grouting material reinforcement beam based on truss model was put forward, and the mechanism of cracking failure of beams strengthened by cement-based grouting material was explained well.
Keywords:cement\|based grouting material; reinforcement; truss; failure mechanism
*江蘇省蘇州市科研基金項目（蘇住建科［2016］1號）。
作者簡介：李祖輝，碩士，高級工程師，Email：8800399@qq.com。
