Proposition for Determining the Residual Strength of Fiber-Reinforced Cement Composite

被引:4
作者
Glodkowska, Wieslawa [1 ]
Laskowska-Bury, Joanna [1 ]
机构
[1] Koszalin Univ Technol, Fac Civil Engn Environm & Geodet Sci, Sniadeckich 2, PL-75453 Koszalin, Poland
关键词
fiber-reinforced composite; steel fibers; bending; beams; plates; residual strength; test methods; RILEM TC 162-TDF; POSTCRACKING BEHAVIOR; FLEXURAL STRENGTHS; DESIGN METHODS; STEEL FIBERS; CONCRETE; LININGS;
D O I
10.3390/ma15217546
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Designing bending elements made of fiber composites requires knowledge of the residual strengths. Residual strengths determined according to PN-EN 14651, regardless of the type of matrix and the fibers used, are characterized by a very-high coefficient of variation, about 30%. The variability of this feature is so large that the normal distribution adopted in statistical analyses, which is consistent for compressive strength or tensile strength, may, in the case of residual strengths, result in a significant overdesign of the elements. Therefore, the article proposes a novel method of determining the residual strength with the use of centrally bent square plates simply supported at the perimeter. The coefficient of variation of this characteristic in the case of plate testing is about 8%.
引用
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页数:18
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