Title:
Beam-Column Joint Retrofitting Using Basalt Fiber- Reinforced Polymer Grid and Cementitious Matrixes
Author(s):
Chhoung Lim, Yeongseok Jeong, and Minho Kwon
Publication:
Structural Journal
Volume:
121
Issue:
1
Appears on pages(s):
133-146
Keywords:
basalt fiber-reinforced polymer (BFRP) grid; engineered cementitious composite (ECC); fabric-reinforced cementitious matrix (FRCM); high-strength mortar; joint failure
DOI:
10.14359/51739190
Date:
1/1/2024
Abstract:
This paper focuses on retrofitting reinforced concrete (RC) beamcolumn joints using a new method—namely, fabric-reinforced
cementitious matrix (FRCM). This method is expected to be a
substitute for externally bonded FRP, as it works better in a moist
and flammable environment. In this study, basalt fiber-reinforced
polymer (BFRP) grids were used as reinforcement and highstrength
mortar and engineered cementitious composites (ECCs)
were used as a cementitious matrix. ECC is ductile and good
for crack distribution. High-strength mortar is good for its high
compressive strength, applicability, shrinkage resistance, lack of
pores, and high bonding strength. The retrofitted specimens were
originally fabricated by taking out the concrete cover around the
joint area, and it was filled back by the cementitious matrix to make
up the original dimension using two different retrofitting types.
As a result, the overall performances of the retrofitted specimens
were improved regarding failure level, ductility, energy dissipation,
strength, and stiffness degradation. The working mechanism of the
retrofitted specimen tended to change as the stress concentration
also attempted to shift from joint to beam for the ECC specimen.
Related References:
1. Esmaeeli, E.; Barros, J. A. O.; Sena-Cruz, J.; Fasan, L.; Li Prizzi, F. R.; Melo, J.; and Varum, H., “Retrofitting of Interior RC Beam–Column Joints Using CFRP Strengthened SHCC: Cast-in-Place Solution,” Composite Structures, V. 122, 2015, pp. 456-467. doi: 10.1016/j.compstruct.2014.12.012
2. Esmaeeli, E.; Danesh, F.; Tee, K. F.; and Eshghi, S., “A Combination of GFRP Sheets and Steel Cage for Seismic Strengthening of Shear-Deficient Corner RC Beam-Column Joints,” Composite Structures, V. 159, 2017, pp. 206-219. doi: 10.1016/j.compstruct.2016.09.064
3. Lim, C.; Jeong, Y.; Kim, J.; and Kwon, M., “Experimental Study of Reinforced Concrete Beam-Column Joint Retrofitted by CFRP Grid with ECC and High Strength Mortar,” Construction and Building Materials, V. 340, 2022, p. 127694. doi: 10.1016/j.conbuildmat.2022.127694
4. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19) (Reapproved 2022),” American Concrete Institute, Farmington Hills, MI, 2019, 624 pp.
5. Bindhu, K. R.; Sukumar, P. M.; and Jaya, K. P., “Performance of Exterior Beam-Column Joints under Seismic Type Loading,” ISET Journal of Earthquake Technology, V. 46, No. 2, 2009, pp. 47-64.
6. Gallo, P. Q.; Pampanin, S.; and Carr, A. J., “Shake-Table Testing of Non-Ductile RC Frames As-Built and Retrofitted with GFRP Laminates and Slab-Weakening,” 16th World Conference on Earthquake Engineering, Santiago, Chile, 2017.
7. Esmaeeli, E.; Barros, J. A. O.; Sena-Cruz, J.; Varum, H.; and Melo, J., “Assessment of the Efficiency of Prefabricated Hybrid Composite Plates (HCPs) for Retrofitting of Damaged Interior RC Beam-Column Joints,” Composite Structures, V. 119, 2015, pp. 24-37. doi: 10.1016/j.compstruct.2014.08.024
8. Akguzel, U., and Pampanin, S., “Effects of Variation of Axial Load and Bidirectional Loading on Seismic Performance of GFRP Retrofitted Reinforced Concrete Exterior Beam-Column Joints,” Journal of Composites for Construction, ASCE, V. 14, No. 1, 2010, pp. 94-104. doi: 10.1061/(ASCE)1090-0268(2010)14:1(94)
9. Mostofinejad, D., and Akhlaghi, A., “Experimental Investigation of the Efficacy of EBROG Method in Seismic Rehabilitation of Deficient Reinforced Concrete Beam–Column Joints Using CFRP Sheets,” Journal of Composites for Construction, ASCE, V. 21, No. 4, 2017, p. 04016116. doi: 10.1061/(ASCE)CC.1943-5614.0000781
10. Shafaei, J.; Hosseini, A.; Marefat, M. S.; and Ingham, J. M., “Rehabilitation of Earthquake Damaged External RC Beam-Column Joints by Joint Enlargement Using Prestressed Steel Angles,” Earthquake Engineering & Structural Dynamics, V. 46, No. 2, 2017, pp. 291-316. doi: 10.1002/eqe.2794
11. Lu, X.; Urukap, T. H.; Li, S.; and Lin, F., “Seismic Behavior of Interior RC Beam-Column Joints with Additional Bars under Cyclic Loading,” Earthquakes and Structures, V. 3, No. 1, 2012, pp. 37-57. doi: 10.12989/eas.2012.3.1.037
12. Dang, C.-T., and Dinh, N.-H., “Experimental Study on Structural Performance of RC Exterior Beam-Column Joints Retrofitted by Steel Jacketing and Haunch Element under Cyclic Loading Simulating Earthquake Excitation,” Advances in Civil Engineering, V. 2017, 2017, pp. 1-11. doi: 10.1155/2017/9263460
13. Jung, W.; Kim, J.; and Kwon, M., “Performance Evaluation of RC Beam-Column Joints with Different Bonding Interfaces,” Scientia Iranica, V. 25, No. 1, 2017, pp. 11-21. doi: 10.24200/sci.2017.4175
14. Mahini, S. S., and Ronagh, H. R., “Strength and Ductility of FRP Web-Bonded RC Beams for the Assessment of Retrofitted Beam–Column Joints,” Composite Structures, V. 92, No. 6, 2010, pp. 1325-1332. doi: 10.1016/j.compstruct.2009.09.006
15. Yu, F.; Zhang, N.; Niu, D.; Kong, Z.; Zhu, D.; Wang, S.; and Fang, Y., “Strain Analysis of PVC-CFRP Confined Concrete Column with Ring Beam Joint under Axial Compression,” Composite Structures, V. 224, 2019, p. 111012. doi: 10.1016/j.compstruct.2019.111012
16. Ha, G.-J.; Cho, C.-G.; Kang, H.-W.; and Feo, L., “Seismic Improvement of RC Beam-Column Joints Using Hexagonal CFRP Bars Combined with CFRP Sheets,” Composite Structures, V. 95, 2013, pp. 464-470. doi: 10.1016/j.compstruct.2012.08.022
17. Khan, M. I.; Al-Osta, M. A.; Ahmad, S.; and Rahman, M. K., “Seismic Behavior of Beam-Column Joints Strengthened with Ultra-High Performance Fiber Reinforced Concrete,” Composite Structures, V. 200, 2018, pp. 103-119. doi: 10.1016/j.compstruct.2018.05.080
18. Okahashi, Y., and Pantelides, C. P., “Strut-and-Tie Model for Interior RC Beam-Column Joints with Substandard Details Retrofitted with CFRP Jackets,” Composite Structures, V. 165, 2017, pp. 1-8. doi: 10.1016/j.compstruct.2017.01.004
19. Xu, C.; Peng, S.; Wang, C.; and Ma, Z., “Influence of the Degree of Damage and Confinement Materials on the Seismic Behavior of RC Beam-SRC Column Composite Joints,” Composite Structures, V. 231, 2020, p. 111002. doi: 10.1016/j.compstruct.2019.111002
20. Lee, W. T.; Chiou, Y. J.; and Shih, M. H., “Reinforced Concrete Beam–Column Joint Strengthened with Carbon Fiber Reinforced Polymer,” Composite Structures, V. 92, No. 1, 2010, pp. 48-60. doi: 10.1016/j.compstruct.2009.06.011
21. Sakthimurugan, K., and Baskar, K., “Experimental Investigation on RCC External Beam-Column Joints Retrofitted with Basalt Textile Fabric under Static Loading,” Composite Structures, V. 268, 2021, p. 114001. doi: 10.1016/j.compstruct.2021.114001
22. Pantelides, C. P.; Okahashi, Y.; and Reaveley, L. D., “Seismic Rehabilitation of Reinforced Concrete Frame Interior Beam-Column Joints with FRP Composites,” Journal of Composites for Construction, ASCE, V. 12, No. 4, 2008, pp. 435-445. doi: 10.1061/(ASCE)1090-0268(2008)12:4(435)
23. Wang, G.-L.; Dai, J.-G.; and Bai, Y.-L., “Seismic Retrofit of Exterior RC Beam-Column Joints with Bonded CFRP Reinforcement: An Experimental Study,” Composite Structures, V. 224, 2019, p. 111018. doi: 10.1016/j.compstruct.2019.111018
24. Qian, H.; Li, Z.; Pei, J.; Kang, L.; and Li, H., “Seismic Performance of Self-Centering Beam-Column Joints Reinforced with Superelastic Shape Memory Alloy Bars and Engineering Cementitious Composites Materials,” Composite Structures, V. 294, 2022, p. 115782. doi: 10.1016/j.compstruct.2022.115782
25. Beydokhti, E. Z., and Shariatmadar, H., “Experimental Investigation of Damaged Exterior RC Beam-Column Joints Retrofitted by FRP Jacketing,” Asian Journal of Civil Engineering, V. 17, 2016, pp. 899-916.
26. Li, W.; Tang, S.; Huang, Z.; Yang, X.; Shi, T.; and Xing, F., “Shear Behavior of Concrete Beam Reinforced in Shear with Carbon Fiber-Reinforced Polymer Mesh Fabric (CFRP-MF) Configuration,” Engineering Structures, V. 218, 2020, p. 110828. doi: 10.1016/j.engstruct.2020.110828
27. Qureshi, J.; Nadir, Y.; and John, S. K., “Bolted and Bonded FRP Beam-Column Joints with Semi-Rigid End Conditions,” Composite Structures, V. 247, 2020, p. 112500. doi: 10.1016/j.compstruct.2020.112500
28. Yang, X.; Gao, W.-Y.; Dai, J.-G.; and Lu, Z.-D., “Shear Strengthening of RC Beams with FRP grid-Reinforced ECC Matrix,” Composite Structures, V. 241, 2020, p. 112120. doi: 10.1016/j.compstruct.2020.112120
29. Murad, Y.; Al Bodour, W.; and Ashteyat, A., “Seismic Retrofitting of Severely Damaged RC Connections Made with Recycled Concrete Using CFRP Sheets,” Frontiers of Structural and Civil Engineering, V. 14, No. 2, 2020, pp. 554-568. doi: 10.1007/s11709-020-0613-8
30. Gao, W. Y.; Dai, J.-G.; and Teng, J. G., “Three-Level Fire Resistance Design of FRP-Strengthened RC Beams,” Journal of Composites for Construction, ASCE, V. 22, No. 3, 2018, p. 05018001. doi: 10.1061/(ASCE)CC.1943-5614.0000840
31. Gao, W. Y.; Dai, J.-G.; and Teng, J. G., “Simple Method for Predicting Temperatures in Insulated, FRP-Strengthened RC Members Exposed to a Standard Fire,” Journal of Composites for Construction, ASCE, V. 19, No. 6, 2015, p. 04015013. doi: 10.1061/(ASCE)CC.1943-5614.0000566
32. Palmieri, A.; Matthys, S.; and Taerwe, L., “Experimental Investigation on Fire Endurance of Insulated Concrete Beams Strengthened with Near Surface Mounted FRP Bar Reinforcement,” Composites Part B: Engineering, V. 43, No. 3, 2012, pp. 885-895. doi: 10.1016/j.compositesb.2011.11.061
33. Ahmed, A., and Kodur, V. K. R., “Effect of Bond Degradation on Fire Resistance of FRP-Strengthened Reinforced Concrete Beams,” Composites Part B: Engineering, V. 42, No. 2, 2011, pp. 226-237. doi: 10.1016/j.compositesb.2010.11.004
34. Zhou, H.; Torres, J. P.; Fernando, D.; Law, A.; and Emberley, R., “The Bond Behaviour of CFRP-to-Steel Bonded Joints with Varying Bond Properties at Elevated Temperatures,” Engineering Structures, V. 183, 2019, pp. 1121-1133. doi: 10.1016/j.engstruct.2018.10.044
35. Dai, J.-G.; Gao, W.-Y.; and Teng, J. G., “Finite Element Modeling of Insulated FRP-Strengthened RC Beams Exposed to Fire,” Journal of Composites for Construction, ASCE, V. 19, No. 2, 2015, p. 04014046. doi: 10.1061/(ASCE)CC.1943-5614.0000509
36. Gao, W.-Y.; Dai, J.-G.; and Teng, J. G., “Fire Resistance Design of Un-Protected FRP-Strengthened RC Beams,” Materials and Structures, V. 49, No. 12, 2016, pp. 5357-5371. doi: 10.1617/s11527-016-0865-x
37. Mostofinejad, D., and Hajrasouliha, M., “Shear Retrofitting of Corner 3D-Reinforced Concrete Beam-Column Joints Using Externally Bonded CFRP Reinforcement on Grooves,” Journal of Composites for Construction, ASCE, V. 22, No. 5, 2018, p. 04018037. doi: 10.1061/(ASCE)CC.1943-5614.0000862
38. Golias, E.; Zapris, A. G.; Kytinou, V. K.; Kalogeropoulos, G. I.; Chalioris, C. E.; and Karayannis, C. G., “Effectiveness of the Novel Rehabilitation Method of Seismically Damaged RC Joints Using C-FRP Ropes and Comparison with Widely Applied Method Using C-FRP Sheets—Experimental Investigation,” Sustainability, V. 13, No. 11, 2021, p. 6454. doi: 10.3390/su13116454
39. Karayannis, C. G., and Golias, E., “Full-Scale Experimental Testing of RC Beam-Column Joints Strengthened Using CFRP Ropes as External Reinforcement,” Engineering Structures, V. 250, 2022, p. 113305. doi: 10.1016/j.engstruct.2021.113305
40. Zhou, J.; Qian, S.; Ye, G.; Copuroglu, O.; van Breugel, K.; and Li, V. C., “Improved Fiber Distribution and Mechanical Properties of Engineered Cementitious Composites by Adjusting the Mixing Sequence,” Cement and Concrete Composites, V. 34, No. 3, 2012, pp. 342-348. doi: 10.1016/j.cemconcomp.2011.11.019
41. Tan, K. H., and Liu, J.-C., “Fire Performance of Engineered Cementitious Composite,” 7th Protection of Structures against Hazards Conference, Hanoi, Vietnam, 2018.
42. Mahmoudi, F.; Abdalla, J. A.; Hawileh, R. A.; and Zhang, Z., “Tensile and Compressive Strength of Polyethylene Engineered Cementitious Composite (PE-ECC) at Elevated Temperature,” Materials Today: Proceedings, V. 65, 2022, pp. 2081-2085. doi: 10.1016/j.matpr.2022.06.451
43. Zhang, P.; Li, Q.-F.; Wang, J.; Shi, Y.; and Ling, Y.-F., “Effect of PVA Fiber on Durability of Cementitious Composite Containing Nano-SiO2,” Nanotechnology Reviews, V. 8, No. 1, 2019, pp. 116-127. doi: 10.1515/ntrev-2019-0011
44. Gao, W.-Y.; Hu, K.-X.; Dai, J.-G.; Dong, K.; Yu, K.-Q.; and Fang, L.-J., “Repair of Fire-Damaged RC Slabs with Basalt Fabric-Reinforced Shotcrete,” Construction and Building Materials, V. 185, 2018, pp. 79-92. doi: 10.1016/j.conbuildmat.2018.07.043
45. Ding, Z.; Xu, M.-R.; Dai, J.-G.; Dong, B.-Q.; Zhang, M.-J.; Hong, S.-X.; and Xing, F., “Strengthening Concrete Using Phosphate Cement-Based Fiber-Reinforced Inorganic Composites for Improved Fire Resistance,” Construction and Building Materials, V. 212, 2019, pp. 755-764. doi: 10.1016/j.conbuildmat.2019.04.038
46. Guo, R.; Cai, L.; Hino, S.; and Wang, B., “Experimental Study on Shear Strengthening of RC Beams with an FRP Grid-PCM Reinforcement Layer,” Applied Sciences, V. 9, No. 15, 2019, p. 2984. doi: 10.3390/app9152984
47. Zheng, Y.-Z.; Wang, W.-W.; and Brigham, J. C., “Flexural Behaviour of Reinforced Concrete Beams Strengthened with a Composite Reinforcement Layer: BFRP Grid and ECC,” Construction and Building Materials, V. 115, 2016, pp. 424-437. doi: 10.1016/j.conbuildmat.2016.04.038
48. Bastani, A.; Das, S.; and Kenno, S. Y., “Flexural Rehabilitation of Steel Beam with CFRP and BFRP Fabrics—A Comparative Study,” Archives of Civil and Mechanical Engineering, V. 19, No. 3, 2019, pp. 871-882. doi: 10.1016/j.acme.2019.04.004
49. Chen, W.; Pham, T. M.; Sichembe, H.; Chen, L.; and Hao, H., “Experimental Study of Flexural Behaviour of RC Beams Strengthened by Longitudinal and U-Shaped Basalt FRP Sheet,” Composites Part B: Engineering, V. 134, 2018, pp. 114-126. doi: 10.1016/j.compositesb.2017.09.053
50. Ali, N. M.; Wang, X.; Wu, Z.; and Hassanein, A. Y. A., “Basalt Fiber Reinforced Polymer Grids as an External Reinforcement for Reinforced Concrete Structures,” Journal of Reinforced Plastics and Composites, V. 34, No. 19, 2015, pp. 1615-1627. doi: 10.1177/0731684415594487
51. Jeong, Y.-S.; Kwon, M.-H.; Seo, H.-S.; Kim, G.-Y.; and Kim, G.-Y., “Torsional Behavior of Beams Retrofitted by PVA-ECC,” Journal of the Korean Society for Advanced Composite Structures, V. 6, No. 1, 2015, pp. 30-37. doi: 10.11004/kosacs.2015.6.1.030
52. Zhu, H.; Yu, K.; and Li, V. C., “Sprayable Engineered Cementitious Composites (ECC) Using Calcined Clay Limestone Cement (LC3) and PP Fiber,” Cement and Concrete Composites, V. 115, 2021, p. 103868. doi: 10.1016/j.cemconcomp.2020.103868
53. Blaber, J.; Adair, B.; and Antoniou, A., “Ncorr: Open-Source 2D Digital Image Correlation Matlab Software,” Experimental Mechanics, V. 55, No. 6, 2015, pp. 1105-1122. doi: 10.1007/s11340-015-0009-1
54. Favvata, M. J., and Karayannis, C. G., “Influence of Pinching Effect of Exterior Joints on the Seismic Behavior of RC Frames,” Earthquakes and Structures, V. 6, No. 1, 2014, pp. 89-110. doi: 10.12989/eas.2014.6.1.089