1.哈尔滨工业大学(深圳)土木与环境工程学院,广东 深圳 518055
2.华南理工大学土木与交通学院,广东 广州 510641
3.哈尔滨工业大学土木工程学院,黑龙江 哈尔滨 150090
张海滨(1988— ),男,在站博士后。主要从事钢筋混凝土地震局部损伤监测研究。E⁃mail:zhanghb01@gmail.com
收稿:2019-01-04,
修回:2019-01-17,
纸质出版:2021-02-15
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张海滨,侯爽,欧进萍.压电智能骨料动态拉应力标定试验研究[J].防灾减灾工程学报,2021,41(01):147-151.
ZHANG Haibin,HOU Shuang,OU Jinping.Experimental Study on Dynamic Tensile Stress Calibration of Smart Aggregate[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(01):147-151.
张海滨,侯爽,欧进萍.压电智能骨料动态拉应力标定试验研究[J].防灾减灾工程学报,2021,41(01):147-151. DOI: 10.13409/j.cnki.jdpme.2021.01.018.
ZHANG Haibin,HOU Shuang,OU Jinping.Experimental Study on Dynamic Tensile Stress Calibration of Smart Aggregate[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(01):147-151. DOI: 10.13409/j.cnki.jdpme.2021.01.018.
为了监测混凝土内部受拉开裂损伤,提出了混凝土内部拉应力监测压电智能骨料,并对其进行了动态拉应力标定试验研究。首先,制备4个压电智能骨料受拉试件,建立拉应力监测系统;其次,对压电智能骨料施加往复拉应力,标定得到其灵敏度系数;然后,对压电智能骨料试件施加单调荷载直至其受拉破坏,得到其抗拉强度及输出的电压信号,对比了破坏过程的实际与监测荷载。结果表明,往复荷载作用下,SA输出与输入荷载呈良好的线性关系,SA的灵敏度系数一致性较好;单调荷载作用下,各SA抗拉强度均高于混凝土抗拉强度。综上,压电智能骨料有潜力应用于混凝土内部的拉应力监测。
This paper proposed a smart aggregate (SA) sensor for tensile stress monitoring, which can be used to monitor tensile damage in concrete structures. The dynamic tensile stress calibration test was carried out on the sensors. Firstly, four test specimens with SAs were prepared and the tensile stress monitoring system was established. After that, cyclic tensile loads were applied on the SAs, and the sensitivities of SAs were obtained. Finally, monotonic loads were applied on the SAs till its failure. The tensile strength of SAs and their output voltages were obtained. The actual and measured loads were compared with each other. It can be found that there is a good linear relationship between the SA output and the applied load during cyclic reverse loading. Additionally, the sensitivities of SAs are in good consistence. The tensile strength for each SA is larger than the concrete tensile strength in monotonic loading. The test results indicate that the SA has the potential for internal tensile stress monitoring of concrete structures.
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