Reinforced concrete separation model based on dynamic bond-slip performances

被引：0
|
作者：
Liu Z. [1 ]
Zhao L. [2 ]
Wu X. [1 ]
Zhou Y. [1 ]
Wang J. [1 ]
机构：
[1] Jiangxi Provincial Institute of Water Sciences, Nanchang
[2] College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 02期
关键词：
Bond-slip; Dynamic analysis; Reinforced concrete; Separation model; Single-spring joint element;
D O I：
10.13465/j.cnki.jvs.2021.02.001
中图分类号：
学科分类号：
摘要：
Based on the bond-slip mechanism of reinforced concrete, a dynamic bond-slip constitutive relation capable of describing the change of the bond behavior of steel bars and concrete under cyclic load was established, and a single-spring joint element method was used to establish a separation model of reinforced concrete. The model overcomes the difficulty to choose the normal stiffness coefficients, and solves the problem of the arrangement of steel bars by means of solving the steel bar elements in local coordinate system, which ensures the calculation accuracy and efficiency under complex stress conditions. In addition, a classic example analysis was performed by combined use of the concrete damage model. The model was used to simulate the relationship between the local deformation and forces of the steel bar and concrete in the structure. Furthermore, the effects of surface reinforcement of the Koyna gravity dam on the overall dynamic response and ultimate failure mode of the dam under the action of seismic load were compared and analyzed. The result shows that when seismic reinforcement is arranged in the vulnerable area of the surface of the dam, it can play a certain role in limiting cracking and improve the seismic performance of the dam. The simulation results of the examples can reflect the general cognition of the engineering community, and also verify the validity of the model. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：1 / 8and48
页数：847
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