Structural Engineering and Mechanics

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Experimental and numerical investigation of RC column strengthening with CFRP strips subjected to low-velocity impact load

  • Mercimek, Omer (Department of Civil Engineering, Ankara Yildirim Beyazit University) ;
  • Anil, Ozgur (Department of Civil Engineering, Gazi University) ;
  • Ghoroubi, Rahim (Department of Civil Engineering, Cankaya University) ;
  • Sakin, Shaimaa (Department of Civil Engineering, Al_ Mustansiriya University) ;
  • Yilmaz, Tolga (Department of Civil Engineering, Konya Teknik University)
  • Received : 2020.11.06
  • Accepted : 2021.07.28
  • Published : 2021.09.25
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Abstract

Reinforced concrete (RC) square columns are vulnerable to sudden dynamic impact loadings such as the vehicle crash to the bridges of highway or seaway, rock fall, the collision of masses with the effect of flood and landslide. In this experimental study RC square columns strengthened with and without CFRP strip subjected to sudden low velocity lateral impact loading were investigated. Drop-hammer testing machine was used to apply the impact loading to RC square columns. The test specimens were manufactured with square cross sections with 1/3 geometric scale. In scope of the study, 6 test specimens were manufactured and tested. The main variables considered in the study were the application point of impact loading, and CFRP strip spacing. A 9.0 kg mass was allowed to fall freely from a height of 1.0 m to apply the impact loading on the columns. During the impact tests, accelerations, impact force, column mid-point displacements and CFRP strip strains measurements were taken. The general behavior of test specimens, collapse mechanisms, acceleration, displacement, impact load and strain time relationships were interpreted, and the load displacement relationships were obtained. The data from the experimental study was used to investigate the effect of variables on the impact performances of RC columns. It has been observed that the strengthening method applied to reinforced concrete columns, which are designed with insufficient shear strength, insufficient shear reinforcement and produced with low strength concrete, using CFRP strips significantly improves the behavior of the columns under the effect of sudden dynamic impact loading and increases their performance. As a result of the increase in the hardness and rigidity of the specimens strengthened by wrapping with CFRP strips, the accelerations due to the impact loading increased, the displacements decreased and the number of shear cracks formed decreased and the damage was limited. Moreover, the finite element analyses of tested specimens were performed using ABAQUS software to further investigate the impact behavior.

Keywords

References

  1. ABAQUS (2015), User's Manual, Version 6.12, SIMULIA, Dassault Systemes Simulia Corp.
  2. Afshin, H., Shirazi, M.R.N. and Karim, A. (2019), "Experimental and numerical study about seismic retrofitting of corrosion-damaged reinforced concrete columns of bridge using combination of FRP wrapping and steel profiles", Steel Compos. Struct., 30(3), 231-251. http://doi.org/10.12989/scs.2019.30.3.231.
  3. Anil, O. and Yilmaz, T. (2015), "Low velocity impact behavior of shear deficient RC beam strengthened with CFRP strips", Steel Compos. Struct., 19(2), 417-439. http://dx.doi.org/10.12989/scs.2015.19.2.417.
  4. Anil, O., Tugrul, R. and Tokgoz, M.N. (2018a), "Investigation of lateral impact behavior of RC columns", Comput. Concrete, 1, 123-132. http://doi.org/10.12989/cac.2018.22.1.123.
  5. Anil, O., Yilmaz, M.C. and Barmaki, W. (2018b), "Experimental and numerical study of RC columns under lateral low-velocity impact load", Proc. Inst. Civil Eng.- Struct. Build., 173(8), 549-567. https://doi.org/10.1680/jstbu.18.00041.
  6. Bao, X. and Li, B. (2010), "Residual strength of blast damaged reinforced concrete columns", Int. J. Impact Eng., 37(3), 295-308. https://doi.org/10.1016/j.ijimpeng.2009.04.003.
  7. Bayraktar, A., Turker, T., Altunisik, A.C. and Sevim, B. (2010), "Evaluation of blast effects on reinforced concrete buildings considering Operational Modal Analysis results", Soil Dyn. Earthq. Eng., 30(5), 310-319. https://doi.org/10.1016/j.soildyn.2009.12.005.
  8. Ben-Dor, G., Dubinsky, A. and Elperin, T. (2009), "Optimization of reinforced concrete panels with rear face steel liner under impact loading", Mech. Bas. Des. Struct. Mach., 37(4), 503-512. https://doi.org/10.1080/15397730903190438.
  9. Birtel, V. and Mark, P. (2006), "Parameterised finite element modelling of RC beam shear failure", Proceedings of the 19th Annual International ABAQUS Users'Conference, Boston.
  10. Cai, B., Hao, L. and Fu, F. (2020), "Postfire reliability analysis of axial load bearing capacity of CFRP retrofitted concrete columns", Adv. Concrete Constr., 10(4), 289-299. http://doi.org/10.12989/acc.2020.10.4.289.
  11. Cai, J., Ye, J.B., Chen, Q.J., Liu, X. and Wang, Y.Q. (2018), "Dynamic behaviour of axially-loaded RC columns under horizontal impact loading", Eng. Struct., 168, 684-697. https://doi.org/10.1016/j.engstruct.2018.04.095.
  12. Cao, V.V. (2020), "Preload effects on behaviour of FRP confined concrete: Experiment, mechanism and modified model", Adv. Concrete Constr., 9(6), 597-610. http://doi.org/10.12989/acc.2020.9.6.597.
  13. CEB (1990), "Concrete structure under impact and impulsive loading", Comite Euro-International Du Beton, Dubrovnik, Latvia.
  14. Demartino, C., Wu, J.G. and Xiao, Y. (2017), "Response of shear-deficient reinforced circular RC columns under lateral impact loading", Int. J. Impact Eng., 109, 196-213. https://doi.org/10.1016/j.ijimpeng.2017.06.011.
  15. Do, T.V., Pham, T.M. and Hao, H. (2018(b)), "Numerical investigation of the behavior of precast concrete segmental columns subjected to vehicle collision", Eng. Struct., 156, 375-393. https://doi.org/10.1016/j.engstruct.2017.11.033.
  16. Do, T.V., Pham, T.M. and Hao, H. (2018a), "Dynamic responses and failure modes of bridge columns under vehicle collision", Eng. Struct., 156, 243-259. https://doi.org/10.1016/j.engstruct.2017.11.053.
  17. Duran, B., Tunaboyu, O., Kaplan, O. and Avsar, O. (2018), "Effectiveness of seismic repairing stages with CFRPs on the seismic performance of damaged RC frames", Struct. Eng. Mech., 67(3), 233-244. http://doi.org/10.12989/sem.2018.67.3.233.
  18. Eurocode 2 (2004), Design of Concrete Structures: Part 1-1: General Rules and Rules for Buildings, BS EN 1992-1-1:2004, British Standards Institution, London.
  19. Fan, W., Liu, B., Huang, X. and Sun, Y. (2019), "Efficient modeling of flexural and shear behaviors in reinforced concrete beams and columns subjected to low-velocity impact loading", Eng. Struct., 195(5), 22-50. https://doi.org/10.1016/j.engstruct.2019.05.082
  20. Fan, W., Yuan, W., Yang, Z. and Fan, Q. (2011), "Dynamic demand of bridge structure subjected to vessel impact using simplified interaction model", J. Bridge Eng., 16(1), 117. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000139
  21. Hao, H. and Wu, C. (2005), "Numerical study of characteristics of underground blast induced surface ground motion and their effect on above-ground structures. Part II: Effects on structural responses", Soil Dyn. Earthq. Eng., 25(1), 39-53. https://doi.org/10.1016/j.soildyn.2004.08.002.
  22. Hao, Y. and Hao, H. (2014), "Influence of the concrete DIF model on the numerical predictions of RC wall responses to blast loadings", Eng. Struct., 73, 24-38 https://doi.org/10.1016/j.engstruct.2014.04.042.
  23. Huynh, L., Foster, S., Valipour, H. and Randall, R. (2015), "High strength and reactive powder concrete columns subjected to impact: Experimental investigation", Constr. Build. Mater., 78, 153-171. https://doi.org/10.1016/j.conbuildmat.2015.01.026.
  24. Kamali, A.Z. (2012), "Shear strength of reinforced concrete beams subjected to blast loading master thesis, royal institute of technology", Master of Science Thesis, Department of Civil and Architectural Engineering, Division of Structural Engineering and Bridges, Stockholm, Sweden.
  25. Kanga, H. and Kim, J. (2017), "Response of a steel column-footing connection subjected to vehicle impact", Struct. Eng. Mech., 63, 125-136. http://doi.org/10.12989/sem.2017.63.1.125.
  26. Kas A.A. (2017), "OMA of model steel structure retrofitted with CFRP using earthquake simulator", Earthq. Struct., 12(6), 689-697. http://doi.org/10.12989/eas.2017.12.6.689.
  27. Keykha, A.H. (2017), "CFRP strengthening of steel columns subjected to eccentric compression loading", Steel Compos. Struct., 23(1), 087-94. http://doi.org/10.12989/.2017.23.1.087.
  28. Kyei, C. and Braimah, A. (2017), "Effects of transverse reinforcement spacing on the response of reinforced concrete columns subjected to blast loading", Eng. Struct., 142, 148-164. https://doi.org/10.1016/j.engstruct.2017.03.044.
  29. Li, B., Rong, H.C. and Pan, T.C. (2007), "Drift-controlled design of reinforced concrete frame structures under distant blast conditions-Part II: Implementation and evaluation", Int. J. Impact Eng., 34(4), 755-770. https://doi.org/10.1016/j.ijimpeng.2006.01.009.
  30. Li, C., Hao, H. and Bi, K. (2017b), "Numerical study on the seismic performance of precast segmental concrete columns under cyclic loading", Eng. Struct., 148, 373-386. https://doi.org/10.1016/j.engstruct.2017.06.062.
  31. Li, J., Wu, C., Hao, H. and Liu, Z. (2017a), "Post-blast capacity of ultra-high performance concrete columns", Eng. Struct., 134, 289-302. https://doi.org/10.1016/j.engstruct.2016.12.057.
  32. Liu, B., Fan, W., Guo, W., Chen, B. and Liu, R. (2017), "Experimental investigation and improved FE modeling of axially-loaded circular RC columns under lateral impact loading", Eng. Struct., 152, 619-642. https://doi.org/10.1016/j.engstruct.2017.09.009.
  33. Liu, Q., Zhou, D., Wang, J. and Liu, W. (2018), "Mechanical behavior of FRP confined steel tubular columns under impact", Steel Compos. Struct., 27(6), 691-702. http://dx.doi.org/10.12989/scs.2018.27.6.691.
  34. Lu, Y. and Chong, Z.W.K. (2005), "Comparative study of buried structure in soil subjected to blast load using 2D and 3D numerical simulations", Soil Dyn. Earthq. Eng., 25(4), 275-288. https://doi.org/10.1016/j.soildyn.2005.02.007.
  35. Malvar, L.J. and Ross, C.A. (1998), "Review of strain rate effects for concrete in tension", ACI Mater. J., 95(6), 735-739.
  36. Othman, H. and Marzouk, H. (2016), "An experimental investigation on the effect of steel reinforcement on impact response of reinforced concrete plates", Int. J. Impact Eng., 88, 12-21. https://doi.org/10.1016/j.ijimpeng.2015.08.015.
  37. Remennikov, A.M. and Kaewunruen, S. (2006), "Impact resistance of reinforced concrete columns: experimental studies and design considerations", 19th Australasian Conference on the Mechanics of Structures and Materials, Christchurch, New Zealand.
  38. Riedel, W., Kawai, N. and Kondo, K. (2009), "Numerical assessment for impact strength measurements in concrete materials", Int. J. Impact Eng., 36, 283-293. https://doi.org/10.1016/j.ijimpeng.2007.12.012.
  39. Riedel, W., Thoma, K., Hiermaier, S. and Schmolinske, E. (1999), "Penetration of reinforced concrete by BETA-B-500-Numerical analysis using a new macroscopic concrete model for hydrocodes", 9th International Symposium on the Interaction of the Effects of Munitions with Structures, Berlin, Germany.
  40. Serror, M.H., Soliman, E.G. and Hassan, A.F. (2017), "Numerical study on the rotation capacity of CFRP strengthened cold formed steel beams", Steel Compos. Struct., 23(4), 283-293. http://doi.org/10.12989/scs.2017.23.4.387.
  41. Sha, Y. and Hao, H. (2013), "Laboratory tests and numerical simulations of barge impact on circular reinforced concrete piers", Eng. Struct., 46, 593-605, https://doi.org/10.1016/j.engstruct.2012.09.002.
  42. Thilakarathna, H.M.I., Thambiratnam, D.P., Dhanasekar, M. and Perera, N. (2010). "Numerical simulation of axiallyloaded concrete columns under transverse impact and vulnerability assessment", Int. J. Impact Eng., 37(11), 1100-1112. https://doi.org/10.1016/j.ijimpeng.2010.06.003.
  43. Tunaboyu, O. and Avsar, O. (2017). "Seismic repair of captive-column damage with CFRPs in substandard RC frames", Struct. Eng. Mech., 61(1), 1-13. http://doi.org/10.12989/sem.2017.61.1.001
  44. Wang, P., Jiang, M., Chen, H., Jin, F., Zhou, J., Zheng, Q. and Fan H. (2017), "Load carrying capacity of CFRP retrofitted broken concrete arch", Steel Compos. Struct., 23(2), 187-194. http://dx.doi.org/10.12989/scs.2017.23.2.187.
  45. Wang, X., Zhang, Y., Su, Y. and Feng, Y. (2011), "Experimental investigation on the effect of reinforcement ratio to capacity of RC column to resist lateral impact loading", Syst. Eng. Procedia, 1, 35-41. https://doi.org/10.1016/j.sepro.2011.08.007.
  46. Wei, J., Li, J. and Wu, C. (2019), "An experimental and numerical study of reinforced conventional concrete and ultra-high performance concrete columns under lateral impact loads", Eng. Struct., 201(7), 109822. https://doi.org/10.1016/j.engstruct.2019.109822.
  47. Wu, C., Hao, H. and Lu, Y. (2005), "Dynamic response and damage analysis of masonry structures and masonry infilled RC frames to blast ground motion", Eng. Struct., 27(3), 323-333. https://doi.org/10.1016/j.engstruct.2004.10.004.
  48. Wu, K.C., Li, B. and Tsai, K.C. (2011), "The effects of explosive mass ratio on residual compressive capacity of contact blast damaged composite columns". J. Constr. Steel Res., 67(4), 602-612. https://doi.org/10.1016/j.jcsr.2010.12.001.
  49. Xie, Q., Sinaei, H., Shariati, M., Khorami, M., Mohamad, E.T. and Bui, D.T. (2019), "An experimental study on the effect of CFRP on behavior of reinforce concrete beam column connections", Steel Compos. Struct., 30(5), 433-441. http://doi.org/10.12989/scs.2019.30.5.433.
  50. Xu, J., Wua, C., Xiang, H., Su, Y., Li, Z.X., Fang, Q., Hao, H., Liu, Z., Zhang, Y. and Li, J. (2016), "Behavior of ultra-high performance fibre reinforced concrete columns subjected to blast loading", Eng. Struct., 118, 97-107. https://doi.org/10.1016/j.engstruct.2016.03.048.
  51. Xu, Y. (2016), "Buckling reliability evaluation of a clamped beam with random imperfections subjected to axial impact using probability density evolution method", Mech. Bas. Des. Struct. Mach., 44(4), 451-461. https://doi.org/10.1080/15397734.2015.1104512.
  52. Yang, G. and Lok, T.S. (2007), "Analysis of RC structures subjected to air-blast loading accounting for strain rate effect of steel reinforcement", Int. J. Impact Eng., 34(12), 1924-1935. https://doi.org/10.1016/j.ijimpeng.2006.11.009.
  53. Yilmaz, T. and Erdem, R.T. (2020), "Experimental investigation of impact behaviour of RC slab with different reinforcement ratios", KSCE J. Civil Eng., 24(1), 241-254. https://doi.org/10.1007/s12205-020-1168-x.
  54. Yilmaz, T., Kirac, N., Anil, O., Erdem, R.T. and Sezer, C. (2018). "Low-velocity impact behaviour of two way RC slab strengthening with CFRP strips", Constr. Build. Mater., 186, 1046-1063. https://doi.org/10.1016/j.conbuildmat.2018.08.027.
  55. Zhang, X., Hao, H. and Li, C. (2016), "Experimental investigation of the response of precast segmental columns subjected to impact loading", Int. J. Impact Eng., 95, 105-124. https://doi.org/10.1016/j.ijimpeng.2016.05.005.