Experimental study on hybrid CFRP-PU strengthening effect on RC panels under blast loading
Source abstract
Abstract
Abstract Recently, fiber reinforced polymer (FRP) usages for strengthening RC infrastructures have been continuously increasing. Especially, the use of FRPs to strengthen structures against a blast terror or an impact accident is receiving great interests from specialists in the structural retrofitting and strengthening field. In order to achieve better protections from blast or impact loading, a new retrofit composite material has been proposed by combining highly stiff and strong material of carbon fiber reinforced polymer (CFRP) with highly ductile material of Polyurea (PU). The combination of CFRP and PU can result in a retrofit composite with enhanced stiffness and ductility properties as well as fragment catching characteristic. To estimate the hybrid composite’s blast resistant capacity, nine 1000 × 1000 × 150 mm RC panel specimens retrofitted with either CFRP, PU, or hybrid composite sheets were blast tested. The blast load was generated by detonating a 15.88 kg ANFO explosive charge at 1.5 m standoff distance. The data of free field incident and reflected blast pressures, maximum and residual displacements, and steel and concrete strains, etc. are measured from the test. Also, the failure mode and crack patterns were evaluated to determine the failure characteristic of the panels. The results from the experiments showed that the hybrid composite has better blast resistant capacity than ordinary retrofit FRPs. The study results are discussed in detail in the paper. The test results will not only provide blast resistant capacity of each retrofit material, but they will be valuable backup data for preliminary estimation of RC structural members’ blast protection performances.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Structural Response to Dynamic Loads · Transportation Safety and Impact Analysis · Structural Behavior of Reinforced Concrete
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
Show source-provided references
1. Behaviour of sandwich panels subject to intense air blasts – part 2: numerical simulation10.1016/j.compstruct.2009.04.010 ↗
2. Analysis of clamped laminated plates subjected to conventional blast10.1016/0263-8223(94)90027-2 ↗
3. Mays · 1995
4. Nonlinear transient analysis of reinforced concrete slabs subjected to blast loading and retrofitted with CFRP composites10.1016/S1359-8368(01)00044-0 ↗
5. Behaviour of sandwich panels subjected to intense air blast – part 1: experiments10.1016/j.compstruct.2009.04.009 ↗
6. Nonlinear transient analysis of rectangular composite laminated plates10.1016/S0263-8223(99)00108-7 ↗
7. Blast resistance of FRP composites and polymer strengthened concrete and masonry structures – a state-of-the-art review10.1016/j.compositesb.2006.07.009 ↗
8. Use of composites to resist blast10.1061/(ASCE)1090-0268(2007)11:6(601) ↗
9. Myers JJ, Belabi A, El-domiaty KA. Blast resistance of unreinforced masonry walls retrofitted with fibre reinforced polymers. In: Proceedings of the 9th North American masonry conference, Clemson, USA; June 1–4 2003. p. 312–23.
10. Analytical study of finite element models for FRP retrofitted concrete structure under blast loads10.1177/1056789507088339 ↗
11. Numerical evaluation of the retrofit effectiveness for GFRP retrofitted concrete slab subjected to blast pressure10.1016/j.compstruct.2009.10.031 ↗
12. Blast analysis of concrete arch structures for FRP retrofitting design10.12989/cac.2009.6.4.305 ↗
13. A study on mesh size dependency of finite element blast structural analysis induced by non-uniform pressure distribution from high explosive blast wave10.1007/s12205-008-0259-x ↗
14. Transient response of composite sandwich plates10.1016/S0263-8223(03)00135-1 ↗
15. Dynamic pulse buckling of composite shells subjected to external blast10.1016/j.compstruct.2009.12.013 ↗
16. Tolba A. Response of FRP-retrofitted reinforced concrete panels to blast loading. Doctoral thesis, Department of Civil and Environmental Engineering, Carleton University, Ottawa, Canada; 2001.
17. Dynamic analysis of clamped laminated curved panels10.1016/0263-8223(94)00056-5 ↗
18. DTRA/TSWG Program. Blast mitigation for structure. Status report. Commission on engineering and technical systems. National Research Council. Washington DC, USA: National Academy Press; 1999.
19. Transient response analysis of laminated stiffened plates10.1016/S0263-8223(02)00036-3 ↗
20. Shock loading of three-dimensional woven composite materials10.1016/j.compstruct.2006.01.014 ↗
21. Patoary MKH, Tan KH. Blast resistance of prototype in-built masonry walls strengthened with FRP systems. In: Proceedings of the 6th int conf on fibre-reinforced plastics for reinforced concrete structures, Singapore; July 8–10 2003. p. 1189–98.10.1142/9789812704863_0114 ↗
22. Ross CA, Purcell MR, Jerome EL. Blast response of concrete beams and slabs externally reinforced with fibre reinforced plastics (FRP). In: Proceedings of the structure. Congress XV – building to last, Portland, USA; April 13–16 1997. p. 673–77.
23. Blast loading response of reinforced concrete panels reinforced with externally bonded GFRP laminates10.1016/j.compositesb.2006.06.016 ↗
24. Use of composite reinforcement to strengthen concrete and air-entrained concrete masonry walls against air blast10.1061/(ASCE)1090-0268(2003)7:2(98) ↗
25. Nam JW. Blast analysis of RC wall structure using high strain rate dependent concrete damage model and non-uniform peak pressure distribution model. Doctoral thesis, Yonsei University, Seoul Korea; 2007.
26. Explosive testing of polymer retrofit masonry walls10.1061/(ASCE)0887-3828(2004)18:2(100) ↗
27. Oesterle MG, Blast simulator wall tests: experimental methods and mitigation strategies for reinforced concrete and concrete masonry. Doctoral thesis, University of California, San Diego, USA; 2009.
28. Morrill KB, Malvar LJ, Crawford JE, Ferritto JM. Blast resistant design and retrofit of reinforced concrete columns and walls. In: Proceedings of the structures-building on the past: securing the future proceedings of structures congress 2004, Nashville, Tennessee, USA; May 22–26 2004.10.1061/40700(2004)154 ↗
29. Oswald CJ, Wesevich JW. Structural retrofits to increase the blast capacity of roofs and masonry walls. In: Proceedings of the SAME national symposium on comprehensive force protection, Charleston, USA; 2001.
30. Blast resistance of polyurea based layered composite materials10.1016/j.compstruct.2007.08.008 ↗
31. Porter JR, Dinan RJ, Hammons ML. Polymer coatings increase blast resistance of existing and temporary structures. AMPTIAC Spec Issue Prot People Risk 2002; 6: 47–67.
32. Kim HJ. Blast analysis of FRP-retrofitted concrete structures considering FRP failure mechanisms. Doctoral thesis, Yonsei University, Seoul Korea; 2007.
33. ASCE Committee on Dynamic effect of the Structural Division. Design of structures to resist nuclear weapons effect. American Society of Civil Engineers, Manuals and Reports on Engineering Practice-No. 42; 1985.
34. ASCE Physical Security. Structural design for physical security: state of the practice report. Task Committee on Physical Security. American Society of Civil Engineers, New York; 1999. p. 4.1–48.10.1016/S1363-4127(99)80020-X ↗
35. ASCE Task Committee on Blast Resistant Design on the Petrochemical Committee. Design of blast resistant buildings in petrochemical facilities, Reston VA; 1997. p. 5.19–22
36. Krauthammer · 2007
37. Improvement of energy absorption of impacted column due to transverse impact10.1016/j.ijimpeng.2003.12.009 ↗