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首页> 外文期刊>Magazine of Concrete Research >Evaluation of residual tensile strength of fire-damaged concrete using a non-linear resonance vibration method
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Evaluation of residual tensile strength of fire-damaged concrete using a non-linear resonance vibration method

机译：非线性共振振动法评估火灾混凝土的残余抗拉强度

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摘要

The non-linear resonance vibration method is a promising non-linear acoustic technique that has been used to evaluate contact-type defects of concrete induced by exposure to fire. In this work, an experimental study was performed on thin fire-damaged concrete discs to evaluate residual tensile strength using the non-linear resonance vibration method. Using correlation analysis, an experimental relationship is proposed between splitting tensile strength and a hysteretic non-linearity parameter (HNP), as measured from some 350 fire-damaged concrete discs of different mix proportions. In addition, the thermal gradient damage of concrete was examined to verify the efficiency of the proposed equation. It was found that the tensile strength of fire-damaged concrete could be effectively estimated from the measured HNP without consideration of the mix proportion, peak temperature, period after the fire or thermal gradient damage.
机译：非线性共振振动方法是一种很有前途的非线性声学技术，已被用于评估因暴露于火而引起的混凝土的接触型缺陷。在这项工作中，对薄薄的受损混凝土圆盘进行了实验研究，以使用非线性共振振动方法评估残余拉伸强度。利用相关分析，提出了从不同混合比例的约350处失火混凝土圆盘测得的劈裂抗拉强度与滞后非线性参数（HNP）之间的实验关系。另外，检查了混凝土的热梯度破坏，以验证所提出方程的效率。已经发现，可以从所测量的HNP有效地估算出受损混凝土的抗拉强度，而无需考虑混合比例，峰值温度，着火后的时间或热梯度破坏。

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  • 来源
    《Magazine of Concrete Research》 |2015年第6期|235-246|共12页
  • 作者

    Sun-Jong Park; Gang-Kyu Park; Hong Jae Yim; Hyo-Gyoung Kwak;

  • 作者单位

    Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;

    Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;

    Department of Construction and Disaster Prevention Engineering, Kyungpook National University, Sangju, Republic of Korea;

    Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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