Non-linear distributions of bond-slip behavior in concrete-filled steel tubes by the acoustic emission technique
Non-linear distributions of bond-slip behavior in concrete-filled steel tubes by the acoustic emission technique
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声发射技术研究钢管混凝土粘结滑移行为的非线性分布
DOI：
10.1016/j.istruc.2020.10.062
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发表时间：
2020-12
期刊：
影响因子：
4.1
通讯作者：
Ning Zhang
中科院分区：
文献类型：
--
作者：
Hui Li;Yongjian Liu;Ning Zhang
本文旨在研究钢管混凝土钢-混凝土界面粘结滑移行为的非线性分布规律。提出了考虑荷载传递边界衰减效应的分析模型。在这一分析中，根据弹性理论推导了一个修正的二阶常微分型控制方程。得到了钢-混凝土界面滑移、粘结应力和势能的解。为了验证模型的有效性，在钢管混凝土顶出试验中进行了声发射(AE)和应变计的测量。试验结果与所提出的分析模型解吻合较好。界面粘结应力沿载荷传递方向呈高度非线性分布。最大应力出现在距试件端部0.2 mm处，约为钢-混凝土界面平均抗剪强度的1.2倍。此外，粘结破坏的AE峰值频率有两个主要频段，分别为75-125千赫和290-340千赫。结果表明，钢管混凝土的钢-混凝土界面剥离破坏主要有两种模式。
This study aims to investigate the non-linear distribution of bond-slip behavior in steel-concrete interface of concrete-filled steel tubes (CFST). An analytical model was proposed to account for the attenuation effect in boundaries of load transfer. In this analysis, a modified governing equation with the second-order ordinary differential form was deduced on the basis of elastic theory. Solutions of slippage, bond stress and potential energy in the steel-concrete interface were then obtained. For the model validation, measurements of acoustic emission (AE), as well as strain gauge, were performed in a push-out test of CFST. Test results agree well with the solutions of the analytical model proposed. The interfacial bond stress exhibits a highly non-linear distribution along the direction of load transfer. The maximum stress appears nearby the position of 0.2Laway from the specimen end, and is about 1.2 times of the average shear strength in steel-concrete interface. In addition, the AE peak frequencies of bond failure have two main bands, including 75–125 kHz and 290–340 kHz. It indicates that there are mainly two failure modes during the debonding of steel–concrete interface in CFST.
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DOI：
--
发表时间：
1993
期刊：
--
影响因子：
--
作者：
H. Shakir-Khalil
通讯作者：
H. Shakir-Khalil
影响因子：
4.1
作者：
Xiushu Qu;Zhihua Chen;D. Nethercot;L. Gardner;M. Theofanous
通讯作者：
Xiushu Qu;Zhihua Chen;D. Nethercot;L. Gardner;M. Theofanous
DOI：
10.1061/(asce)0733-9445(1999)125:5(477
发表时间：
1999-05-01
期刊：
JOURNAL OF STRUCTURAL ENGINEERING-ASCE
影响因子：
--
作者：
Roeder, CW;Cameron, B;Brown, CB
通讯作者：
Brown, CB
影响因子：
4.1
作者：
Lyu, Wan-Qing;Han, Lin-Hai
通讯作者：
Han, Lin-Hai
工字钢与全再生骨料混凝土界面粘结滑移本构关系研究
影响因子：
7.4
作者：
Bai, Guoliang;Ma, Jinfeng;Chen, Xiaona
通讯作者：
Chen, Xiaona