Evaluating Load-Carrying Capacity of Short Composite Beam Using Strain-Hardening HPFRC
The main goal of this study was to develop the short composite beams using strain-hardening fiber-reinforced concrete (S_HPFRC) and conventional concrete (CC) together. Firstly, the sensitivity of the hybrid fiber system to the enhancement of mechanical properties of plain high performance concrete...
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Published in | KSCE journal of civil engineering Vol. 25; no. 4; pp. 1410 - 1423 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Seoul
Korean Society of Civil Engineers
01.04.2021
Springer Nature B.V 대한토목학회 |
Subjects | |
Online Access | Get full text |
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Summary: | The main goal of this study was to develop the short composite beams using strain-hardening fiber-reinforced concrete (S_HPFRC) and conventional concrete (CC) together. Firstly, the sensitivity of the hybrid fiber system to the enhancement of mechanical properties of plain high performance concrete (P_mortar) was experimentally studied. The ranking of the mechanical properties in terms of sensitive coefficient was observed as follows: direct tensile > splitting tensile > compressive. Next, the responses of short composite beams with various thicknesses of S_HPFRC were investigated under a three-point bending test (3PBT). Six beams with no reinforcement (type A) and six beams with reinforcement were tested (type B) with their identical dimensions of 150 × 150 × 300 mm (depth × width × span length). The compressive strength of S_HPFRC and CC were about 80.65 MPa and 21.12 MPa, respectively. Most of the composite beams were observed to fail in shear mode. And, there was a favorable effect on enhancing the load-carrying capacity of a beam as S_HPFRC was placed at a critical tensile zone. Finally, based on the test data, the analytical equations were proposed for the purpose of predicting shear resistance of the S_HPFRC — CC beam. |
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ISSN: | 1226-7988 1976-3808 |
DOI: | 10.1007/s12205-021-1327-8 |