Title:
Impact Testing of Reinforced Concrete Beams Shear- Strengthened with Fiber-Reinforced Polymer Wraps
Author(s):
Tao Liu, Thomas H.-K. Kang, Andrew Nghiem, and Yan Xiao
Publication:
Structural Journal
Volume:
117
Issue:
3
Appears on pages(s):
297-310
Keywords:
carbon fiber-reinforced polymer (CFRP); drop-weight test; dynamic response; impact loading; reinforced concrete beam; strengthening
DOI:
10.14359/51723497
Date:
5/1/2020
Abstract:
The dynamic behavior of reinforced concrete (RC) beams shear-strengthened with externally bonded carbon fiber-reinforced polymer (CFRP) wraps under low-velocity impact loading was experimentally investigated. Twelve simply supported RC beam specimens classified into two groups according to stirrup ratios of 0 and 0.1% were tested using an instrumented drop-weight impact machine. The main variable was the center-to-center spacing of the CFRP wraps, which was retrofit at three levels from light, to critical, and to heavy strengthening. The dynamic responses of all the specimens are recorded and discussed in detail. Effects of the CFRP strip spacing and shear span-depth ratio on dynamic response of beam specimens are analyzed.
Related References:
1. ACI Committee 440, “Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures (ACI 440.2R-17),” American Concrete Institute, Farmington Hills, MI, 2017, 112 pp.
2. Deogekar, P., and Andrawes, B., “Hybrid Confinement of High Strength Concrete Using Shape Memory Alloys and Fiber-Reinforced Polymers,” Journal of Structural Integrity and Maintenance, V. 3, No. 1, 2018, pp. 22-32. doi: 10.1080/24705314.2018.1426172
3. Singh, S. B.; Chauhan, A.; and Munjal, P., “Composite Mechanics-Based Design Approach for FRP-Strengthened Walls,” Journal of Structural Integrity and Maintenance, V. 3, No. 3, 2018, pp. 160-170. doi: 10.1080/24705314.2018.1492670
4. Ibrahim Ary, M., and Kang, T. H.-K., “Shear-Strengthening of Reinforced & Prestressed Concrete Beams Using FRP: Part I – Review of Previous Research,” International Journal of Concrete Structures and Materials, V. 6, No. 1, 2012, pp. 41-47. doi: 10.1007/s40069-012-0004-1
5. Kang, T. H.-K., and Ibrahim Ary, M., “Shear-Strengthening of Reinforced & Prestressed Concrete Beams Using FRP: Part II – Experimental Investigation,” International Journal of Concrete Structures and Materials, V. 6, No. 1, 2012, pp. 49-57. doi: 10.1007/s40069-012-0005-0
6. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14),” American Concrete Institute, Farmington Hills, MI, 2014, 519 pp.
7. Pham, T. M., and Hao, H., “Review of Concrete Structures Strengthened with FRP Against Impact Loading,” Structures, V. 7, 2016, pp. 59-70. doi: 10.1016/j.istruc.2016.05.003
8. Cantwell, W. J., and Smith, K., “The Static and Dynamic Response of CFRP-Strengthened Concrete Structures,” Journal of Materials Science Letters, V. 18, No. 4, 1999, pp. 309-310. doi: 10.1023/A:1006635307213
9. Erki, M. A., and Meier, U., “Impact Loading of Concrete Beams Externally Strengthened with CFRP Laminates,” Journal of Composites for Construction, ASCE, V. 3, No. 3, 1999, pp. 117-124. doi: 10.1061/(ASCE)1090-0268(1999)3:3(117)
10. Tang, T., and Saadatmanesh, H., “Behavior of Concrete Beams Strengthened with Fiber-Reinforced Polymer Laminates under Impact Loading,” Journal of Composites for Construction, ASCE, V. 7, No. 3, 2003, pp. 209-218. doi: 10.1061/(ASCE)1090-0268(2003)7:3(209)
11. Hamed, E., and Rabinovitch, O., “Dynamic Behavior of Reinforced Concrete Beams Strengthened with Composite Materials,” Journal of Composites for Construction, ASCE, V. 9, No. 5, 2005, pp. 429-440. doi: 10.1061/(ASCE)1090-0268(2005)9:5(429)
12. Soleimani, S., and Banthia, N., “Impact Resistance of Shear-Strengthened RC Beams with Sprayed GFRP,” International Journal of GEOMATE, V. 1, No. 2, 2011, pp. 83-87.
13. Goldston, M.; Remennikov, A.; and Sheikh, M., “Experimental Study on the Effectiveness of CFRP Strengthening of Shear-Deficient Reinforced Concrete Beams under Impact Loading,” Proceedings, 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM), Byron Bay, NSW, Australia, 2014, pp. 427-434.
14. Pham, T. M., and Hao, H., “Impact Behavior of FRP-Strengthened RC Beams without Stirrups,” Journal of Composites for Construction, ASCE, V. 20, No. 4, 2016, pp. 04016011. doi: 10.1061/(ASCE)CC.1943-5614.0000671
15. Liu, T., and Xiao, Y., “Impact Behavior of CFRP-Strip Wrapped RC Beams without Stirrups,” Journal of Composites for Construction, ASCE, V. 21, No. 5, 2017, pp. 04017035. doi: 10.1061/(ASCE)CC.1943-5614.0000815
16. Huo, J.; Li, Z.; Zhao, L.; Liu, J.; and Xiao, Y., “Dynamic Behavior of Carbon Fiber-Reinforced Polymer-Strengthened Reinforced Concrete Beams without Stirrups under Impact Loading,” ACI Structural Journal, V. 15, No. 3, May 2018, pp. 775-787.
17. ASTM E8/E8M-11, “Standard Test Methods for Tension Testing of Metallic Materials,” American Standards and Testing,” ASTM International, West Conshohocken, PA, 2011, 27 pp.
18. BS EN 206-13, “Concrete – Specification, Performance, Production and Conformity,” British Standards Institutions, London, UK, 2013.
19. ASTM C94/C94M-12a, “Standard Specification for Ready-Mixed Concrete,” ASTM Internatonal, West Conshohocken, PA, 2012, 13 pp.
20. ASTM D3039-18, “Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials,” ASTM International, West Conshohocken, PA, 2017, 13 pp.