DOI QR코드

DOI QR Code

Torsional strengthening of RC beams using stainless steel wire mesh -Experimental and numerical study

  • Patel, Paresh V. (Department of Civil Engineering, Institute of Technology, Nirma University) ;
  • Raiyani, Sunil D. (Department of Civil Engineering, Institute of Technology, Nirma University) ;
  • Shah, Paurin J. (Department of Civil Engineering, Institute of Technology, Nirma University)
  • 투고 : 2017.12.13
  • 심사 : 2018.06.21
  • 발행 : 2018.08.25

초록

Locally available Stainless Steel Wire Mesh (SSWM) bonded on a concrete surface with an epoxy resin is explored as an alternative method for the torsional strengthening of Reinforced Concrete (RC) beam in the present study. An experiment is conducted to understand the behavior of RC beams strengthened with a different configuration of SSWM wrapping subjected to pure torsion. The experimental investigation comprises of testing fourteen RC beams with cross section of $150mm{\times}150mm$ and length 1300 mm. The beams are reinforced with 4-10 mm diameter longitudinal bars and 2 leg-8 mm diameter stirrups at 150 mm c/c. Two beams without SSWM strengthening are used as control specimens and twelve beams are externally strengthened by six different SSWM wrapping configurations. The torsional moment and twist at first crack and at an ultimate stage as well as torque-twist behavior of SSWM strengthened specimens are compared with control specimens. Also the failure modes of the beams are observed. The rectangular beams strengthened with corner and diagonal strip wrapping configuration exhibited better enhancement in torsional capacity compared to other wrapping configurations. The numerical simulation of SSWM strengthened RC beam under pure torsion is carried out using finite element based software ABAQUS. Results of nonlinear finite element analysis are found in good agreement with experimental results.

키워드

참고문헌

  1. Ameli, M., Hamid, R. and Dux, P. (2007), "Behavioural model of FRP strengthened reinforced concrete beams under torsion", J. Compos. Constr., 11(2), 192-200. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:2(192)
  2. ASTM (2008), D3039/D3039M, Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials, 03.
  3. Coronado, C.A. and Lopez, M.M. (2007), "Damage approach for the prediction of debonding failure on concrete elements strengthened with FRP", J. Compos. Constr., 11(4), 391-400. https://doi.org/10.1061/(ASCE)1090-0268(2007)11:4(391)
  4. Esfahani, M.R., Kianoush, M.R. and Tajari, A.R. (2007), "Flexural behaviour of reinforced concrete beams strengthened by CFRP sheets", Eng. Struct., 29(10), 2428-2444. https://doi.org/10.1016/j.engstruct.2006.12.008
  5. FIB Bulletin 14 (2001). Externally Bonded FRP Reinforcement for RC Structures, International Federation for Structural Concrete (fib).
  6. Ganganagoudar, A., Mondal, T.G. and Suriya Prakash, S. (2016), "Analytical and finite element studies on behavior of FRP strengthened RC beams under torsion", Compos. Struct., 153, 876-885. https://doi.org/10.1016/j.compstruct.2016.07.014
  7. Hii, A.K.Y. and Al-Mahaidi, R. (2006), "Experimental investigation on torsional behavior of solid and box-section RC beams strengthened with CFRP using photogrammetry", J. Compos. Constr., 10(4), 321-329. https://doi.org/10.1061/(ASCE)1090-0268(2006)10:4(321)
  8. IS: 10262-2009 : Indian Concrete Mix Design Guide Lines (2009), Bureau of Indian Standard, New Delhi.
  9. Jeng, C. and Hsu, T.T.C. (2009), "A softened membrane model for torsion in reinforced concrete members", Eng. Struct., 31(9), 1944-1954. https://doi.org/10.1016/j.engstruct.2009.02.038
  10. Kumar, V. and Patel, P.V. (2016a), "Strengthening of axially loaded circular concrete columns using stainless steel wire mesh (SSWM)-Experimental investigations", Constr. Build. Mater., 124, 186-198. https://doi.org/10.1016/j.conbuildmat.2016.06.109
  11. Kumar, V. and Patel, P.V. (2016b), "Strengthening of axially loaded concrete columns using stainless steel wire mesh (SSWM)-numerical investigations", Struct. Eng. Mech., 60(6), 979-999. https://doi.org/10.12989/sem.2016.60.6.979
  12. Panchacharam, S. and Belarbi, A. (2002), "Torsional behavior of reinforced concrete beams strengthened with FRP composites", First FIB Congress, Osaka, Japan.
  13. Patel, P.V., Jariwala, V.H. and Purohit, S.P. (2016), "Torsional strengthening of RC beams using GFRP composites", J. Inst. Eng. (India): Ser. A, 97(3), 313-322. https://doi.org/10.1007/s40030-016-0163-1
  14. Patel, P.V. and Raiyani, S. (2017), "Flexural strengthening of RC beam using stainless steel wire mesh", 33 rd National Convention of Civil Engineers on Recent Advances in Structural Engineering, The Institution of Engineers, India.
  15. Patel, P.V. and Raiyani, S. (2018), "Shear strengthening of RC beam using stainless steel wire mesh", Advances in Concrete, Structural & Geotechnical Engineering, Bloomsbury India, 452-457.
  16. Sikadur 30 LP (2016), Product Data Sheet, Adhesive for Bonding Reinforcement, Version GCC, Edition 10/09/2016, ID No. 020401040010000003, Retrieved 21 - 10.
  17. Teng, J.G., Smith, S.T., Yao, J. and Chen, J.F. (2003), "Intermediate crack-induced debonding in RC beams and slabs", Constr. Build. Mater., 17(6-7), 447-462. https://doi.org/10.1016/S0950-0618(03)00043-6
  18. Tibhe, S.B. and Rathi, VR. (2016), "Comparative experimental study on torsional behavior of RC beam using CFRP and GFRP fabric wrapping", Procedia Technol., 24, 140-147. https://doi.org/10.1016/j.protcy.2016.05.020
  19. Woven Wire Cloth & Perforated Sheet Product Data Sheet, Banaraswala Metal Crafts (P) Ltd, Coimbatore, (n.d.). www.banaraswala.com.