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Numerical Simulation and Calculation of Bond Performance Between Deformed Bar and Concrete(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年03期
Page:
1-12
Research Field:
Publishing date:

Info

Title:
Numerical Simulation and Calculation of Bond Performance Between Deformed Bar and Concrete
Author(s):
YI Wei-jian;  LUO Xian-ming
(College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China)
Keywords:
bond performance;  bond-slip constitutive relation;  recursion and iteration calculation;  anchorage length;  mean bond strength
PACS:
TU375
DOI:
10.19815/j.jace.2021.01048
Abstract:
Several existing reinforced concrete bond-slip constitutive relationships were compared and analyzed, and a continuous bond-slip constitutive relation with constraints condition was selected.The component was divided into finite micro-segments along the anchorage length, and the recursive and iterative numerical calculation method was used to make each small segment meet the constitutive relationship, through repeated iterations, the reinforcement stress and bond stress along the anchorage length met the boundary conditions, and the corresponding reinforcement stress under each slip was obtained. It was convenient to calculate the load-displacement response curve. In order to verify the correctness of the constitutive relation and the rationality of the calculation method, several groups of experimental data were compared. The calculation formula of anchorage length and the iterative calculation of anchorage length in different codes were analyzed and compared. The results show that the calculation results are in good agreement with the experimental data. Due to the continuity of the selected constitutive relation function, the iteration can converge stably, and due to the high efficiency, it is easy to calculate the ultimate anchorage length of the reinforcement under given conditions. All the calculation of anchorage length is safe, but the safety reserve of China is the lowest.

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Last Update: 2021-05-20