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Home > Archive>Volume 52, Issue 1, 2024 >59-67. DOI:10.11908/j.issn.0253-374x.22243
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Experimental Study on Shear Capacities of Reinforced Concrete Beams Strengthened by Direct-shear-bolted Side-plates near Beam Ends Under Different Interfacial Conditions
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1.College of Civil Engineering， Chongqing University， Chongqing 400045， China;2.Key Laboratory of New Technology for Construction of Cities in Mountain Area， Chongqing University， Chongqing 400045， China;3.Sichuan Institute of Building Research Co.， Ltd.， Chengdu 610000， China;4.Guangdong Architectural Design & Research Institute Co.， Ltd.， Guangzhou 510010， China

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TU375.1

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    Abstract:

    This paper presents a test program of shear capacities of reinforced concrete beam strengthened by direct-shear-bolted side-plates near beam ends. The test program consists of one control shear span and five shear spans strengthened in shear. Test parameters involve interfacial conditions and depth of side-plates. Test results show that all kinds of adhesion interfaces are eventually de-bonded in loading process， without affecting shear capacities whether the adhesion is weak or strong. Shear capacities are effectively improved by increasing the plate depth and the number of corresponding direct-shear bolts. There are two mechanisms in the shear strengthening of direct-shear-bolted side-plates system， i.e.， the constraint mechanism and the composite action mechanism. The constraint mechanism takes effect by constraining the development of diagonal crack width， and in the composite action mechanism the bolted side-plates directly transfer part of the shear force to the support. Steel plates with lower depth are mainly in the constraint mechanism， while steel plates with higher depth work both in the constraint mechanism and composite action mechanism.

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QUAN Xueyou, LUO Chen, LIU Jiadi, HUANG Huihui. Experimental Study on Shear Capacities of Reinforced Concrete Beams Strengthened by Direct-shear-bolted Side-plates near Beam Ends Under Different Interfacial Conditions[J].同济大学学报(自然科学版),2024,52(1):59~67

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  • Received:May 25,2022
  • Online: January 27,2024
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