Shear strength of fibre-reinforced reactive powder concrete I-shaped beam without stirrups
| Autor: | Feng Fu, Xuan Chen, Ling-Zhi Jin, Xiao-Fang Deng, Kai Qian |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Shaped beam 0201 civil engineering Stirrup law.invention Compressive strength Prestressed concrete TA Shear (geology) law 021105 building & construction General Materials Science Composite material Civil and Structural Engineering |
| Zdroj: | Magazine of Concrete Research. 72:1112-1124 |
| ISSN: | 1751-763X 0024-9831 |
| DOI: | 10.1680/jmacr.18.00525 |
| Popis: | Due to the high compressive strength of steel fiber reinforced (SFR) and Reactive Powder concrete (RPC), higher degree of prestressing is available for the beams using fiber reinforced reactive powder concrete. Hence, a slenderer structural component can be designed, which could save self-weight, work spacing, and potential reducing the costs. However, comparing to conventional reinforced concrete (RC) beams, studies on post-tensioning SFR-RPC beams subjected to shear failure are fewer. In this study, a series of shear tests for four large-scale beams (one SFR-RPC beam and three post-tensioning SFR-RPC beams) are made to quantify the effects of levels of prestressing on shear load capacity of SFR-RPC beams. Finally, the test results together with data published from existing literatures are compared to the design strength calculated in accordance to different standards. It is found that the current code provisions will underestimate the shear load capacity significantly. In addition, an analytical model is proposed to predict the shear load capacity of the test specimens. A good correlation is observed with a mean analytical model to experimental strength ratio of 1.02 and coefficient of variation of 0.12. |
| Databáze: | OpenAIRE |
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