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EXPERIMENT ON BONDING SHEAR DEFORMATION FOR REINFORCEMENT OF FIRE-INJURED CONCRETE
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摘要: 为了研究火伤混凝土粘结加固后粘结面的工作性能,对大量遭受高温损伤混凝土与新混凝土的Z形粘结试件进行剪切试验,测得不同温度(20~900℃)、不同冷却方式和不同界面粗糙度情况下粘结面的剪切滑移曲线,拟合出相应的计算公式,并概括粘结面剪切滑移曲线的变形特点。Abstract: In order to study the bonding performance of adhesive reinforcement of fire-injured concrete,a large numbers of shear experiments on Z-shape bonding specimens based on injured concrete subjected to elevated temperature were done.Shear slipping curves were measured under several circumstances such as different temperature,different cooling ways and different interfacial roughness.At same time,the corresponding calculation formulas are deduced and the feature of shear slipping curve is also generalized.The study will provide reference for numerical simulating calculation of bonding reinforcement.
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Key words:
- elevated temperature /
- bonding /
- shear slipping curve
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白凤.合肥市某商场火灾后主体结构的修复与加固设计.工业建筑,2002(11):80-82 [2] Fiebrich M H.Inflecence of the Surface Roughness on Adhere Between Concrete and Guite Mortar Overlays//Wittmann F H.Adherence of Young on Old Concrete.Proceedings of the 2nd Bolomey workshop.Aedificatio Verlag,Unterengstringon,1994 [3] CECS 25:90 混凝土结构加固技术规范 [4] 内维尔 A M.混凝土的性能.李国泮,马贞勇,译.北京:中国建筑工业出版社,1983 [5] 钱在兹,吴慧.混凝土高温后的扫描电镜实验研究.福州大学学报(自然科学版),1996,24(9):34-38 [6] Janotka Ivan,Bagel L'ubomir.Pore Structures,Permeabilities and Compressive Strengths of Concrete at Temperatures up to 800℃.ACI Materials Journal,2003,100(1/2):87-896 [7] 杨彦克.火灾混凝土结构损伤评估现状与发展//结构工程科学发展青年专家研讨会论文集.哈尔滨,1992 -
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