| 洪雷.GSIFCON材料压敏特性及对梁构件机敏检测研究[J].,2010,(6):1008-1013 |
| GSIFCON材料压敏特性及对梁构件机敏检测研究 |
| Study of compressive sensitivity character of graphite slurry infiltrated steel fiber concrete and smart monitoring of beam specimens |
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| DOI：10.7511/dllgxb201006030 |
| 中文关键词: 压敏特性 损伤 电阻 监测 |
| 英文关键词: compressive sensitivity character damage resistance monitoring |
| 基金项目:建设部研究开发基金资助项目(2008-K4-31). |
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| 中文摘要: |
| GSIFCON(graphite slurry infiltrated steel fiber concrete，石墨水泥砂浆注浆钢纤维混凝土)是由SIFCON(slurry infiltrated fiber concrete，水泥砂浆注浆钢纤维混凝土) 改性而成的一种导电机敏混凝土材料．为了利用GSIFCON材料检测梁构件内部损伤，采用3根混凝土棱柱体试件对GISFCON的压敏特性进行了研究．采用GSIFCON与钢筋混凝土梁叠合的方法，测定在不同应力作用下，梁构件破坏过程中GSIFCON的电阻相对变化，来监测梁构件内部损伤情况．试验结果表明，GSIFCON电阻相对变化可灵敏地感知压应力的变化．在不同应力作用下，梁构件受压区GSIFCON的电阻相对变化始终与梁构件损伤过程保持对应关系，可对梁构件损伤进行检测． |
| 英文摘要: |
| GSIFCON (graphite slurry infiltrated steel fiber concrete) is a type of conductive smart concrete modified from SIFCON (slurry infiltrated fiber concrete). In order to use GSIFCON smart material to monitor the internal damage of the beam specimens, the compressive sensitivity characters of GSIFCON were studied by tests with 3 concrete prismatic specimens. For monitoring the internal damage of the beam specimens, the relative variations of GSIFCON resistance during the destructive process were measured under different stresses with reinforced concrete beams laminated by GSIFCON. The experimental results show that the relative variations of GSIFCON resistance are in sensitive response to the change of the compressive stress. The relative variations of GSIFCON resistance in the compressive parts keep correspondence with the process of the beam damage, so the beam internal damage can be supervised by monitoring the relative variations of GSIFCON resistance. |
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