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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Reinforcement Strains in Reinforced Concrete Tensile Members Recorded by Strain Gauges and FBG Sensors: Experimental and Numerical Analysis
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Reinforcement Strains in Reinforced Concrete Tensile Members Recorded by Strain Gauges and FBG Sensors: Experimental and Numerical Analysis

机译：应变片和FBG传感器记录的钢筋混凝土受拉构件中的钢筋应变：实验和数值分析

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摘要

Experimental and numerical studies have been carried out on reinforced concrete (RC) short tensile specimens. Double pull-out tests employed rectangular RC elements of a length determined not to yield any additional primary cracks. Tests were carried out with tensor strain gauges installed within a specially modified reinforcement bar and, alternatively, with fibre Bragg grating based optical sensors. The aim of this paper is to analyse the different experimental setups regarding obtaining more accurate and reliable reinforcement strain distribution data. Furthermore, reinforcement strain profiles obtained numerically using the stress transfer approach and the Model Code 2010 provided bond-slip model were compared against the experimental results. Accurate knowledge of the relation between the concrete and the embedded reinforcement is necessary and lacking to this day for less scattered and reliable prediction of cracking behaviour of RC elements. The presented experimental strain values enable future research on bond interaction. In addition, few double pull-out test results are published when compared to ordinary bond tests of single pull-out tests with embedded reinforcement. The authors summarize the comparison with observations on experimental setups and discuss the findings.
机译：已经对钢筋混凝土（RC）短抗拉试样进行了实验和数值研究。双重拉拔测试采用了矩形RC元件，其长度确定为不会产生任何其他初级裂纹。使用安装在经过特殊改装的钢筋内的张量应变仪以及基于光纤布拉格光栅的光学传感器进行测试。本文的目的是分析有关获得更准确和可靠的钢筋应变分布数据的不同实验设置。此外，将使用应力传递方法和型号Code 2010提供的粘结滑动模型数值获得的增强应变曲线与实验结果进行了比较。对于混凝土和埋入式钢筋之间的关系，必须具备准确的知识，而迄今为止，对于RC构件的开裂行为而言，其散布性和可靠性较低，目前尚缺乏。提出的实验应变值使将来对键相互作用的研究成为可能。此外，与带有嵌入钢筋的单拉试验的普通粘结试验相比，很少有双拉试验结果公布。作者总结了与实验设置的观察结果的比较，并讨论了发现。

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