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首页> 外文会议>International Structural Engineering and Construction Conference(ISEC-03); 20050920-23; Shunan(JP) >Study of load-deflection response and flexural toughness parameters of SFRC with center point loading
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Study of load-deflection response and flexural toughness parameters of SFRC with center point loading

机译：中心点荷载下SFRC的荷载-挠度响应及挠曲韧性参数研究

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摘要

The toughness of steel fiber reinforced concrete (SFRC) is an engineering measure of the capacity of the composite to absorb energy during failure. In this study, the load-deflection response and toughness parameters of SFRC were studied in accordance with RILEM and JSCE standards based on the CPL configuration. Several concrete specimens with the same mixture proportion but reinforced with different types of steel fibers were fabricated and tested conforming RILEM bending test recommendation. Afterward, the specimens were considered on the feature of basic modes in load-deflection response for investigating of its relationship with fiber content and specifications. Moreover, the toughness parameters were also calculated on both RILEM and JSCE standards for comparing the results in the aspect of correlation. Finally, the effects of fiber characteristics on both standards parameters were also investigated to find any specific trend. It is resulted that load-deflection response differs by changing fiber content and specifications. It was also concluded that there is an acceptable correlation between RILEM and JSCE toughness parameters, although the RILEM indices will present more information about the post-peak part of load-deflection curve. Finally, the results show that improving fiber specifications reflects almost the same amount of changes in toughness indices while fiber content increasing does not follow the trend.
机译：钢纤维增强混凝土（SFRC）的韧性是对复合材料在破坏过程中吸收能量的能力的一种工程度量。在这项研究中，根据RILEM和JSCE标准，基于CPL配置研究了SFRC的荷载-挠度响应和韧性参数。制作并测试了几种具有相同混合比但用不同类型的钢纤维增强的混凝土试样，并符合RILEM弯曲测试建议。然后，考虑试样在载荷-挠度响应中的基本模式特征，以研究其与纤维含量和规格的关系。此外，还在RILEM和JSCE标准上计算了韧性参数，以比较相关性方面的结果。最后，还研究了纤维特性对两个标准参数的影响，以发现任何特定趋势。结果是，通过改变纤维含量和规格，载荷-挠度响应会有所不同。还得出结论，尽管RILEM指数将提供有关载荷-挠度曲线的峰后部分的更多信息，但RILEM和JSCE韧性参数之间存在可接受的相关性。最后，结果表明，纤维规格的提高反映出韧性指数的变化几乎相同，而纤维含量的增加却没有遵循这种趋势。

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