期刊
COMPOSITE STRUCTURES
卷 244, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2020.112309
关键词
Reinforced concrete beam; Shear capacity; Strengthening; Fibre reinforced polymer; Natural fibre; Jute
资金
- Faculty of Engineering, Kasetsart University
- Kasetsart University Research and Development Institute (KURDI), Thailand
- Thailand Research Fund, Thailand [DBG-6180004]
- Ratchadapisek Sompoch Endowment Fund (2019), Chulalongkorn University, Thailand [762003-CC]
- Faculty of Engineering, Kasetsart University, Thailand
This paper examines the use of natural jute fabric reinforced polymer (JFRP) composite sheets as external strengthening material of reinforced concrete (RC) beams. Pre-damaged RC beam specimens are prepared to represent seismic damage. The shear behaviour of pre-damaged deep RC beams strengthened with JFRP sheets are investigated subjected to non-reversed cyclic three-point bending load test. The JFRP strengthening ratio and the pre-damaged level of RC beam are considered in this study. The test results revealed that JFRP can significantly improve the shear strength capacity of beams. All strengthened beams show a similar failure mode which is a rupture on JFRP sheets. The shear enhancement of JFRP strengthened pre-damaged beams are comparable to that of non-damaged beams strengthened with conventional FRPs, proving the applicability of JFRP strengthening in pre-damaged shear-deficient beams. In addition, the experimental results are compared with the predicted values by the Japanese design codes.
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