About the author:

China Railway 18th Bureau Group Third Engineering Co., Ltd., Zhuozhou, Hebei 072750, China

Abstract:

This paper aims to analyze the reinforcement effect of prestressed steel reinforcementtechnology in concrete frame structures commonly used in logistics warehouses. A loading test was carriedout on a reinforced concrete frame structure with defects. During the test, the reinforcement effects of tworeinforcement methods, external prestressed steel reinforcement and near⁃surface embedding method（NSM）， on the ultimate load of the frame structure node were compared. The test considered threecommon defects,which were set on the inside, outside and column of the frame structure. The studyshowed that the ultimate loads of the three groups of defective specimens were reduced by 58%, 22% and54% respectively compared with the components without defects. For defect 1, the ultimate loads afterexternal prestressed steel reinforcement and NSM steel reinforcement increased by 9.2kN and 39.1kNrespectively. For defect 2, the ultimate loads after the two measures were strengthened increased by17.7kN and 14.6kN respectively. For defect 3, the ultimate loads after the two measures werestrengthened increased by 21.4kN and 26.2kN respectively.