An experimental study of dynamic bond-slip behaviors of plain steel bars in concrete at different strain rates

被引：0
|
作者：
Fu Y. [1 ,2 ]
Yu X. [2 ]
Dong X. [2 ]
Zhou F. [2 ]
Li P. [1 ]
机构：
[1] State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing
[2] MOE Key Laboratory of Impact and Safety Engineering, Ningbo University, Ningbo, 315211, Zhejiang
来源：
Baozha Yu Chongji/Explosion and Shock Waves | 2019年 / 39卷 / 06期
关键词：
Dynamic bond-slip behavior; Dynamic increase factor(DIF) of pullout strength; Steel bar reinforced concrete; Strain rate;
D O I：
10.11883/bzycj-2018-0513
中图分类号：
学科分类号：
摘要：
To investigate the effect of strain rate on the bond-slip behaviors of smooth steel bars in concrete, we conducted plain steel bar pullout tests from quasi-static to impact loading using a high-speed tensile test machine and obtained the whole bond-slip curves of the plane steel bar at different strain rate with reasonable designed stop devices and testing methods. The test results show that the bond strength increased obviously, and the failure mode transferred from pullout to splitting with the increase of the strain rate, that the dynamic increase factor(DIF) curve can be divided into two parts, those of the low and high strain rates, and that the DIF increased slowly with the increase of the strain rate at low strain rates, but increased sharply at high strain rates. © 2019, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.
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