DOI QR코드

DOI QR Code

Experimental and numerical investigation of RC sandwich panels with helical springs under free air blast loads

  • Rashad, Mohamed (Department of Civil Engineering, University of British Columbia) ;
  • Wahab, Mostafa M.A. (Department of Civil Engineering, Military Technical Collage) ;
  • Yang, T.Y. (International Joint Research Laboratory of Earthquake Engineering, Tongji University)
  • 투고 : 2018.03.28
  • 심사 : 2019.01.25
  • 발행 : 2019.02.10

초록

One of the most important design criteria in underground structure is to design lightweight protective layers to resist significant blast loads. Sandwich blast resistant panels are commonly used to protect underground structures. The front face of the sandwich panel is designed to resist the blast load and the core is designed to mitigate the blast energy from reaching the back panel. The design is to allow the sandwich panel to be repaired efficiently. Hence, the underground structure can be used under repeated blast loads. In this study, a novel sandwich panel, named RC panel - Helical springs- RC panel (RHR) sandwich panel, which consists of normal strength reinforced concrete (RC) panels at the front and the back and steel compression helical springs in the middle, is proposed. In this study, a detailed 3D nonlinear numerical analysis is proposed using the nonlinear finite element software, AUTODYN. The accuracy of the blast load and RHR Sandwich panel modelling are validated using available experimental results. The results show that the proposed finite element model can be used efficiently and effectively to simulate the nonlinear dynamic behaviour of the newly proposed RHR sandwich panels under different ranges of free air blast loads. Detailed parameter study is then conducted using the validated finite element model. The results show that the newly proposed RHR sandwich panel can be used as a reliable and effective lightweight protective layer for underground structures.

키워드

과제정보

연구 과제 주관 기관 : National Science Foundation China

참고문헌

  1. Ansys (2007), Theory reference manual; Release 11.0, ANSYS Inc., USA.
  2. Autodesk Inventor (2017), Professional manual; Autodesk Inc., USA.
  3. AUTODYN (2005), Theory manual revision 4.3; Horsham, Century Dynamics Ltd., UK.
  4. Codina, R., Ambrosini, D. and Borbon, F. (2016), "Experimental and numerical study of a RC member under a close-in blast loading", Struct. Eng., 127, 145-158. https://doi.org/10.1016/j.engstruct.2016.08.035
  5. CONWEP (1991), Conventional Weapons Effects Program; US Army Waterways Experiment Station, Vicksburg, MS, USA.
  6. Hao, H., Ma, G.W. and Zhou, Y.X. (1998), "Numerical simulation of underground explosions", Fragblast Int. J. Blasting Fragment., 2, 383-395.
  7. Herrmann, W. (1969), "Constitutive equation for the dynamic compaction of ductile porous materials", J. Appl. Phys., 40(6), 2490-2499. https://doi.org/10.1063/1.1658021
  8. Hu, G., Wu, J. and Li, L. (2016), "Advanced Concrete Model in Hydrocode to Simulate Concrete Structures under Blast Loading", Adv. Civil Eng., 2016, 1-13.
  9. Johnson, G.R. and Cook, W.H. (1983), "A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures", Proceedings of the 7th International Symposium on Ballistics, The Hague, Netherlands, April.
  10. Li, X., Miao, C., Wang, Q. and Geng, Z. (2016), "Antiknock performance of interlayered high-damping-rubber blast door under thermobaric shock wave", Shock Vib., Article ID 2420893, 9 pages.
  11. Luccioni, B., Araoz, G. and Labanda, N. (2013), "Defining erosion limit for concrete", Int. J. Protect. Struct., 4(3), 315-355. https://doi.org/10.1260/2041-4196.4.3.315
  12. Mazek, S.A. (2014), "Performance of sandwich structure strengthened by pyramid cover under blast effect", Struct. Eng. Mech., Int. J., 50(4), 471-486. https://doi.org/10.12989/sem.2014.50.4.471
  13. Mazek, S. and Mostafa, A. (2013), "Impact of a shock wave on a structure strengthened by rigid polyurethane foam", J. Struct. Eng. Mech., Int. J., 48(4), 569-585. https://doi.org/10.12989/sem.2013.48.4.569
  14. Nurick, G.N., Langdon, G.S., Chi, Y. and Jacob, N. (2009), "Behaviour of sandwich panels subjected to intense air blast - Part 1: Experiments", Compos. Struct., 91, 433-441. https://doi.org/10.1016/j.compstruct.2009.04.009
  15. Nystrom, U. and Gylltoft, K. (2009), "Numerical studies of the combined effects of blast and fragment loading", Int. J. Impact Eng., 36(8), 995-1005. https://doi.org/10.1016/j.ijimpeng.2009.02.008
  16. Nystrom, U. and Gylltoft, K. (2011), "Comparative numerical studies of projectile impacts on plain and steel-fiber reinforced concrete", Int. J. Impact Eng., 38(23), 95-105. https://doi.org/10.1016/j.ijimpeng.2010.10.003
  17. Prawoto, Y., Ikeda, M., Manville, S.K. and Nishikawa, A. (2008), "Design and failure modes of automotive suspension springs", Eng. Fail. Anal., 15, 1155-1174. https://doi.org/10.1016/j.engfailanal.2007.11.003
  18. Rashad, M. (2013), "Study the Behavior of Composite Sandwich Structural Panels under Explosion Using Finite Element Method", M.Sc. Thesis; Military Technical College (MTC), Cairo, Egypt.
  19. Rashad, M. and Yang, T.Y. (2018), "Numerical study of steel sandwich plates with RPF and VR cores materials under free air blast loads", Steel Compos. Struct., Int. J., 27(6), 717-725.
  20. Rashad, M. and Yang, T.Y. (2019), "Improved nonlinear modelling approach of simply supported PC slab under free blast load using RHT model", Comput. Concrete, Int. J. [Accepted]
  21. Riedel, W. (2000), "Beton unter dynamischen Lasten Meso- und makromechanische Modelle und ihre Parameter", Doctoral Thesis; Institut Kurzzeitdynamik, Ernst-Mach-Institut, der Bundeswehr Munchen, Freiburg, Germany. [In German]
  22. Riedel, W., Thoma, K. and Hiermaier, S. (1999), "Penetration of reinforced concrete by BETA-B-500 numerical analysis using a new macroscopic concrete model for hydrocodes", Proceedings of 9th International Symposium on Interaction of The Effect of Munitions with Structures, Berlin-Strausberg, Germany, January.
  23. Riedel, W., Wicklein, M. and Thoma, K. (2008), "Shock properties of conventional and high strength concrete, experimental and mesomechanical analysis", Int. J. Impact Eng., 35, 155-171. https://doi.org/10.1016/j.ijimpeng.2007.02.001
  24. Shimozaki, M. (1997), FEM for springs, Nikkan Kogyo Shimbunsha, Japan Society of Spring Engineers. [In Japanese]
  25. Technical Manual TM5-1300 (1990), Structures to resist the effects of accidental explosions; U.S. Army, USA.
  26. Tu, Z. and Lu, Y. (2009), "Evaluation of typical concrete material models used in hydrocodes for high dynamic response simulations", Int. J. Impact Eng., 36(1), 132-146. https://doi.org/10.1016/j.ijimpeng.2007.12.010
  27. Tu, Z. and Lu, Y. (2010), "Modifications of RHT material model for improved numerical simulation of dynamic response of concrete", Int. J. Impact Eng., 37(10), 1072-1082. https://doi.org/10.1016/j.ijimpeng.2010.04.004
  28. UFC 3-340-02 (UNIFIED FACILITIES CRITERIA), (2008), Structures to resist the effects of accidental explosions; U.S. Army corps of engineers, USA.
  29. Vinson, J.R. (2001), "Sandwich structures", Appl. Mech. Rev., 54(3), 201-214. https://doi.org/10.1115/1.3097295
  30. Wahab, M.M.A. and Mazek, S.A. (2016), "Performance of double reinforced concrete panel against blast hazard", Comput. Concrete, Int. J., 18(6), 807-826. https://doi.org/10.12989/cac.2016.18.6.807
  31. Wang, G. and Zhang, S. (2014), "Damage prediction of concrete gravity dams subjected to underwater explosion shock loading", Eng. Fail Anal., 39, 72-91. https://doi.org/10.1016/j.engfailanal.2014.01.018
  32. Wang, W., Zhang, D., Lu, F.Y., Wang, S.C. and Tang, F.J. (2013), "Experimental study and numerical simulation of the damage mode of a square reinforced concrete slab under close-in explosion", Eng. Fail. Anal., 27, 41-51. https://doi.org/10.1016/j.engfailanal.2012.07.010
  33. Wu, C., Hao, H. and Zhou, Y.X. (1999), "Dynamic response analysis of rock mass with stochastic properties subjected to explosive loads", Fragblast Int. J. Blast. Fragment., 3, 137-153.
  34. Xia, Z., Wang, X., Fan, H., Li, Y. and Jin, F. (2016), "Blast resistance of metallic tube-core sandwich panels", Int. J. Impact Eng., 97, 10-28. https://doi.org/10.1016/j.ijimpeng.2016.06.001
  35. Xu, K. and Lu, Y. (2006), "Numerical simulation study of spallation in reinforced concrete plates subjected to blast loading", Comput. Struct., 84(5), 431-439. https://doi.org/10.1016/j.compstruc.2005.09.029
  36. Zhou, X.Q. and Hao, H. (2008), "Numerical prediction of reinforced concrete exterior wall response to blast loading", Adv. Struct. Eng., 11(4), 355-367. https://doi.org/10.1260/136943308785836826
  37. Zhu, F. (2008), "Impulsive Loading of Sandwich Panels with Cellular Cores", Ph.D. Dissertation; Swinburne University of Technology, Hawthorn, Australia.

피인용 문헌

  1. Study on the propagation mechanism of blast waves using the ultra-dynamic strain test system vol.28, pp.1, 2019, https://doi.org/10.12989/sss.2021.28.1.143