The response of embedded strain sensors in concrete beams subjected to thermal loading
The response of embedded strain sensors in concrete beams subjected to thermal loading
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DOI：
10.1016/j.conbuildmat.2014.07.102
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发表时间：
2014-11-15
影响因子：
7.4
通讯作者：
Middleton, Campbell R.
中科院分区：
文献类型：
--
作者：
Ge, Yu;Elshafie, Mohammed Z. E. B.;Middleton, Campbell R.
广泛的商用传感器经常用于记录土木工程结构的响应，这些土木工程结构可能会受到意外的负载情况、环境条件的变化或材料劣化。然而，当使用这些传感器时面临的共同问题是区分由于温度变化而由结构经历的应变变化与由于其他原因而发生的应变变化。应变传感器上的温度效应通常通过允许温度效应（温度补偿）来调节;然而，文献中调查应变传感器测量在经受温度变化时的性能的研究有限。了解温度对应变传感器的影响将大大提高土木工程师监测结构材料性能的能力。本文在钢筋混凝土梁中安装了不同类型的常用和先进的应变传感器，测量了不同温度条件下混凝土的温度应变响应。实验结果表明，来自不同传感器的应变测量值存在25-30%的差异。它示出在本文中，这种差异是由于传感器的不准确性，相关的测试条件和不确定性与温度补偿方法的不确定性的综合影响。(C)2014爱思唯尔有限公司版权所有。
A wide range of commercially available sensors are frequently used to record the response of civil engineering structures that may be subjected to unexpected loading scenarios, changes of environmental conditions or material deterioration. However, a common problem faced when using these sensors is to distinguish strain changes experienced by the structure due to a temperature change from strain changes that occur due to other causes. Temperature effects on strain sensors are usually accommodated by allowing for temperature effects (temperature compensation); however, there is limited research in the literature that investigates the performance of strain sensor measurements when subjected to temperature change. Understanding the temperature effect on strain sensors will greatly enhance the ability of civil engineers to monitor the performance of structural materials. In this paper, different types of commonly used and advanced strain sensors have been installed in a reinforced concrete beam to measure the thermal strain response of concrete under different temperature conditions. The experimental results demonstrated a 25-30% difference in strain measurements from the different sensors. It is shown in this paper that this difference is due to the combined effects of sensor inaccuracy, uncertainties related to the testing conditions and uncertainties associated with the temperature compensation methods. (C) 2014 Elsevier Ltd. All rights reserved.