Evaluation of the Ultimate Strength of the Ultra-High-Performance Fiber-Reinforced Concrete Beams
| Autor: | Hyung-Suk Jung, Moon-Sung Lee, Hyun-Ki Choi, Baek-Il Bae, Chang-Sik Choi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
design recommendations 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Fiber-reinforced concrete lcsh:Technology 0201 civil engineering law.invention lcsh:Chemistry Flexural strength law 021105 building & construction Ultimate tensile strength Shear strength strength evaluation General Materials Science shear reinforcement Fiber shear strength Composite material Instrumentation lcsh:QH301-705.5 Fluid Flow and Transfer Processes lcsh:T Process Chemistry and Technology General Engineering ultra-high-performance fiber-reinforced concrete lcsh:QC1-999 Computer Science Applications Shear (sheet metal) Compressive strength lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Volume fraction lcsh:Engineering (General). Civil engineering (General) lcsh:Physics flexure strength |
| Zdroj: | Applied Sciences Volume 11 Issue 7 Applied Sciences, Vol 11, Iss 2951, p 2951 (2021) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app11072951 |
| Popis: | Evaluation of the ultimate strength for the UHPFRC (ultra-high-performance fiber-reinforced concrete) flexural members was conducted. In this study, an experimental program about UHPFRC beams was conducted with the effect of fiber volume fraction, shear span to depth ratio, and compressive strength of matrix as the main variables. Among them, it was found that fiber volume fraction was the variable that had the greatest influence on the ultimate strength. The inclusion of 2% volume fraction steel fiber increases the shear and flexural strength of UHPFRC beams significantly. In particular, steel fiber inclusion changed the mode of failure of beams from diagonal shear failure into flexural failure. For the classification of failure patterns, the ultimate flexural strength and shear strength of UHPFRC members were evaluated using the current design code and UHPC guidelines. Flexural ultimate strength was affected by the size and shape of the stress block and consideration of the matrix’s tensile strength. For the accurate shear strength prediction of UHPFRC beams, the tensile strength of the high strength matrix and the effect of steel fiber should be considered. |
| Databáze: | OpenAIRE |
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