Tensile Response of Strain-Hardening Ultra-High Performance Fiber Concrete Thin Layer Based on Fiber Orientation Distribution

被引：0

作者：

Shen X. ^{[1
,2
]}

Shao X. ^{[1
]}

Brühwiler E. ^{[2
]}

机构：

[1] College of Civil Engineering, Hunan University, Changsha

[2] Swiss Federal Institute of Technology Lausanne (EPFL), Station 18, Lausanne

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2021年 / 49卷 / 11期

关键词：

4-point bending test; Direct tensile test; Fiber orientation; Non-destructive test; Strain-hardening; Ultra-high performance concrete;

D O I：

10.14062/j.issn.0454-5648.20210391

中图分类号：

学科分类号：

摘要：

The distribution of fiber orientation in strain-hardening ultrahigh performance concrete (SH-UHPC) thin slab was measured by a non-destructive test (NDT) method using a magnetic probe. Afterwards, the dumbbell specimens and rectangular plates were extracted orthotopically along the flowing direction of fresh mixture. The direct tensile test (DTT), 4-point bending test (4PBT) and inverse analysis were then conducted. The results indicate that the fibers tend to align perpendicularly toward the flow direction of fresh mixture in SH-UHPC thin layer under horizontal free-flow condition. The tensile response (inelastic part) of SH-UHPC ranges widely in thin slab, mainly due to the continuous change of fiber orientation along the flowing direction. Compared with 4PBT, DTT can directly, comprehensively, and accurately reflect the tensile response of SH-UHPC in thin slab. In addition, the correction factor for tensile strength (i.e., Kf=1.12) in thin slab is less than the recommended value in AFGC standard, and the correction factor for ultimate strain Kε in thin slab is 1.25 based on the experimental results and available data from the corresponding literature. © 2021, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：2384 / 2392

页数：8

共 25 条

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