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《Sichuan Building Science》 2013-01
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Experimental investigation on the shear performance of repaired seriously damaged reinforced concrete beams

CUI Xiguang1,MA Nan1,WU Mang2(1.Shenyang Jianzhu University,Shenyang 110168,China; 2.Dalian Center of Construction Engineering Quality Inspection LTD.,Dalian 116021,China)  
For the situation of "repairable in moderate earthquake" out of building seismic fortification goal "not bad in small earthquake,repairable in moderate earthquake and not collapse in big earthquake",taking reinforced concrete beams which are seriously damaged as the research subjects,it is researched the shear performance of the repaired beams.Produced four inverted-T specimens which simulate the seriously damaged reinforced concrete frame beams,using grouting material to replace the damaged concrete of the whole cross-section area and pasting CFRP on the surface to repair the beams,analyze the shear strength by low-cycle repeated load.The carrying capacity of normal section has been studied by some authors of this article,and the focus of this article is the carrying capacity of oblique section.The results show that the shear strength of repaired beams improves significantly;grouting material used in the whole cross-section can be very good to work with the original concrete;and CFRP not only improves the shear strength of beams,also limits the cracks to carry out.Compared experimental results with the theoretical results,obtained shear strength increase rate,verify the feasibility of this composite reinforcement,to provide experimental basis for engineering practice.
【Fund】: 沈阳市科学技术计划项目(1091167-9-00)
【CateGory Index】: TU375.1
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