Experimental and numerical study of strengthening and repairing heat-damaged RC circular column using hybrid system of CFRP
Source abstract
Abstract
This study aims to investigate the behavior of heat damaged reinforced concrete RC circular column considering effect of heat and repair technique. Six RC circular column with diameter of 185 mm and 800 mm in height were cast, heated at 400 °C and 600 °C for 3 h, strengthened and repaired with hybrid system of CFRP and then tested under concentric load. Also, four RC circular columns from Obaidat et al. (2020) [3] were used for comparison. Complementary to the experimental investigation, a finite element modeling (FEM) was developed to simulate the compression behavior of heat damaged RC circular column. The result showed that specimens strengthened and repaired with hybrid system SC-H23-COMP and (DC-H400-COM and DC-H600-COM) exhibited the higher improvement in compression capacity about 100.4% and (86.7% and 53%), receptively, more than the control specimens. It was concluded that as the temperature increases the strength of the specimen decreases. Moreover, the strength in repaired specimens by hybrid system increased by 64.9% and 48.85% more than unheated control RC column specimen CC-COM. Finally, the FEM results provides a good agreement with experimental results and the model capable to predict the compression behavior of the RC circular column.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Fire effects on concrete materials · Structural Load-Bearing Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Study on compressive mechanical capability of concrete after high temperature exposure and thermo-damage constitutive model10.1016/j.conbuildmat.2014.06.052 ↗
2. Residual compressive strength and freeze–thaw resistance of ordinary concrete after high temperature10.1016/j.conbuildmat.2013.12.089 ↗
3. A.T. Obaidat, A.M. Ashteyat, S. Hanandeh, A.Y. Al-Btoush, Behavior of heat damaged circular reinforced concrete columns repaired using Carbon Fiber Reinforced Polymer rope, J. Build. Eng. (2020), 101424ol (31), 101424. 〈https://www.sciencedirect.com/science/article/pii/S2352710219327007?via%3Dihub〉.10.1016/j.jobe.2020.101424 ↗
4. Post-fire behavior of bond between high strength pozzolanic concrete and reinforcing steel10.1016/j.conbuildmat.2004.03.006 ↗
5. Experimental study on residual flexural behavior of reinforced concrete beams after exposure to fire
6. Structural damage evaluation of reinforced concrete beams exposed to high temperatures10.1177/1042391512474666 ↗
7. An approach for evaluating residual capacity of reinforced concrete beams exposed to fire10.1016/j.engstruct.2015.11.047 ↗
8. Effect of elevated temperature on bond between steel reinforcement and fiber reinforced concrete10.1016/j.firesaf.2007.11.002 ↗
9. Repair of heat-damaged reinforced concrete T-beams using FRC jackets10.1680/macr.2007.59.3.223 ↗
10. Repair of heat-damaged reinforced concrete slabs using fibrous composites materials10.1016/j.conbuildmat.2010.09.033 ↗
11. Bond characteristics between concrete and near-surface mounted carbon fiber reinforced polymer cords
12. Flexural behavior of reinforced concrete beam using CFRP hybrid system
13. Repair of fire-damaged reinforced concrete columns
14. Effectiveness of hybrid fibre-reinforced polymer retrofitting on behaviour of fire damaged RC columns under axial compression10.1016/j.engstruct.2020.110458 ↗
15. Structural repair of fire damaged concrete
16. Repair of heat-damaged shallow beams using advanced campsites10.1617/s11527-007-9238-9 ↗
17. Effect of advanced composites in repairing heat-damaged RC columns10.1617/s11527-013-0022-8 ↗
18. Flexural strengthening of reinforced concrete beams through externally bonded FRP sheets and near surface mounted FRP bars
19. Effect of cyclic damage on the performance of RC square columns strengthened using Hybrid FRP composites under Axial Compression10.3390/fib7100090 ↗
20. Emergency repair of severely damaged reinforced concrete column elements under axial compression: an experimental study10.1016/j.conbuildmat.2017.08.127 ↗
21. Behavior of heated damaged reinforced concrete beam-column joints strengthened with FRP
22. Experimental study of the behaviour of RC corbels strengthened with CFRP sheets
23. Torsional behavior of reinforced concrete T-beams strengthened with CFRP strips
24. Experimental study on bond behavior between heat-damaged recycled asphalt pavement concrete and NSM-CFRP strips
25. Behavior of NSM CFRP reinforced concrete columns: experimental and analytical work
26. A.T. Obaidat, Flexural behavior of reinforced concrete beam using CFRP hybrid system, Eur. J. Environ. Civ. Eng. 〈https://doi.org/10.1080/19648189.2021.1934552〉.10.1080/19648189.2021.1934552 ↗
27. Performance of RC beam strengthened with NSM-CFRP strip under pure torsion: experimental and numerical study
28. Strengthening and repair of one-way and two-way self-compacted concrete slabs using near-surface-mounted carbon-fiber-reinforced polymers10.1177/1369433219843649 ↗
29. Y.T. Obaidat, A.M. Ashteyat, A.T. Obaidat, S.F. Alfaris, A new technique for repairing reinforced concrete columns, J. Build. Eng. 30 (2020) Article 101256. 〈https://www.sciencedirect.com/science/article/pii/S2352710219319047〉.10.1016/j.jobe.2020.101256 ↗
30. Evaluation of parameters of bond action between FRP and concrete10.1061/(ASCE)CC.1943-5614.0000378 ↗
31. Concrete damage plasticity model for modeling FRP-to-concrete bond behavior10.1061/(ASCE)CC.1943-5614.0000482 ↗
32. ASTMC31, Standard Practice for Making and Curing Concrete Test Specimens in the Field, New York, 2014.
33. ACI committee 318, Building code requirements for structural concrete (ACI 318M-05), American Concrete Institute, Michigan (USA), 2005.
34. Prestressing of NSM steel strands to enhance the structural performance of prestressed concrete beams10.1016/j.conbuildmat.2016.10.077 ↗
35. Repair of fire damaged circular reinforced concrete columns with FRP composites10.1016/j.conbuildmat.2010.06.017 ↗
36. FRP confnement of heat-damaged circular RC columns10.1007/s40069-016-0181-4 ↗
37. Compression behavior of confined concrete masonry boundary elements10.1016/j.engstruct.2016.11.043 ↗
38. Performance of RC beam strengthened with NSM-CFRP strip under pure torsion: experimental and numerical study10.1007/s40999-019-00487-2 ↗
39. Uniaxial compressional stress-strain relation of concrete10.1061/(ASCE)0733-9445(1988)114:9(2133) ↗