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Design Method for Reinforced Concrete Based on Bond-Slip Energy Consumption

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posted on 2023-01-05, 09:15 authored by Jianhui Yang, Nianxu Yang, Xinyan Lin, Shuren Wang, Tom Cosgrove, Peter HughesPeter Hughes

To reveal the energy consumption characteristics of a steel bar and all-lightweight shale ceramsite concrete (ALWSCC), focusing on hot rolled crescent ribbed bars (CRB) and hot rolled plain steel bars (PSB), a series of pull-out tests were carried out. The bonding failure modes, the contribution of the ribs to bond-slip failure and the energy consumption characteristics were analyzed based on the curves of pull-out load F-slip displacement S and energy consumption W–slip displacement S. Results show that the splitting failure is the main failure of the CRB specimen, and the pulling out failure is the main failure of the PSB one. The ratio of the total energy dissipation of splitting failure to that of the pulling out failure is less than 30%. The mechanical bite force between CRB and concrete contributes more than 95% to the bond strength. The pull-out force is divided into four stages, such as the chemical adhesive force stage (elastic and micro-elastic strain stage), the common-effect stage of mechanical bearing force and static frictional force (plastic development stage), and the frictional force stage (crushed stage). The new design is proposed to guarantee the ductility of the reinforced concrete structure, which is based on the bond-slip energy consumption rather than the traditional strength design. The conclusions provide a reference to the reinforced concrete practice. 

Funding

Coupling effect of tension and reversal torque of anchor cable and analysis of failure bearing mechanism of induced anchorage section

National Natural Science Foundation of China

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Research on Dynamic Catastrophe Monitoring Based on 1000 - meter - deep Well Structures

National Natural Science Foundation of China

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NSFRF200202

History

Publication

Buildings 12 (12), 2065

Publisher

MDPI

Department or School

  • School of Engineering

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