Earthquakes and Structures

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Experimental and analytical evaluation of a low-cost seismic retrofitting method for masonry-infilled non-ductile RC frames

  • Received : 2017.03.27
  • Accepted : 2017.06.20
  • Published : 2017.06.25
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Abstract

This study evaluates the effectiveness of a newly developed retrofitting scheme for masonry-infilled non-ductile RC frames experimentally and by numerical simulation. The technique focuses on modifying the load path and yield mechanism of the infilled frame to enhance the ductility. A vertical gap between the column and the infill panel was strategically introduced so that no shear force is directly transferred to the column. Steel brackets and small vertical steel members were then provided to transfer the interactive forces between the RC frame and the masonry panel. Wire meshes and high-strength mortar were provided in areas with high stress concentration and in the panel to further reduce damage. Cyclic load tests on a large-scale specimen of a single-bay, single-story, masonry-infilled RC frame were carried out. Based on those tests, the retrofitting scheme provided significant improvement, especially in terms of ductility enhancement. All retrofitted specimens clearly exhibited much better performances than those stipulated in building standards for masonry-infilled structures. A macro-scale computer model based on a diagonal-strut concept was also developed for predicting the global behavior of the retrofitted masonry-infilled frames. This proposed model was effectively used to evaluate the global responses of the test specimens with acceptable accuracy, especially in terms of strength, stiffness and damage condition.

Keywords

Acknowledgement

Supported by : Burapha University

References

  1. ACI 318 (2008), Building code requirements for structural concrete and commentary, American Concrete Institute, Farmington Hills, MI
  2. Acun, B. and Sucuoglu, H. (2006), "Strengthening of masonry infill walls in reinforced concrete frames with wire mesh reinforcement", 8th US National Conference on Earthquake Engineering, San Francisco, CA, April.
  3. Al-Chaar, G., Issa, M. and Sweeney, S. (2002), "Behavior of masonry-infilled nonductile reinforced concrete frames", J. Struct. Eng., 128(8), 1055-1063. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:8(1055)
  4. Altin, S., Anil, O., Kara, M.E. and Kaya, M. (2008), "An experimental study on strengthening of masonry infilled rc frames using diagonal cfrp strips", Compos. Part B: Eng., 39(4), 680-693. https://doi.org/10.1016/j.compositesb.2007.06.001
  5. ASCE41-06 (2007), Seismic rehabilitation of existing buildings, American Society of Civil Engineers, Reston, VA.
  6. Asteris, P.G., Antoniou, S.T., Sophianopoulos, D.S. and Chrysostomou, C.Z. (2011), "Mathematical macromodeling of infilled frames: State of the art", J. Struct. Eng., 137(12), 1508-1517. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000384
  7. ASTM (2007), Standard test method for compressive strength of masonry prisms (ASTM C1314), ASTM International, West Conshohocken, PA.
  8. Bertero, V. and Brokken, S. (1983), "Infills in seismic resistant building", J. Struct. Eng., 109(6), 1337-1361. https://doi.org/10.1061/(ASCE)0733-9445(1983)109:6(1337)
  9. Billington, S., Kyriakides, M., Blackard, B., Willam, K., Stavridis, A. and Shing, P. (2009), "Evaluation of a sprayable, ductile cement-based composite for the seismic retrofit of unreinforced masonry infills", Improving the seismic performance of existing buildings and other structures, San Francisco, CA, December.
  10. Calvi, G.M. and Bolognini, D. (2001), "Seismic response of reinforced concrete frames infilled with weakly reinforced masonry panels", J. Earthq. Eng., 5(2), 153-185. https://doi.org/10.1080/13632460109350390
  11. Chiou, T.C. and S.J. Hwang (2015), "Tests on cyclic behavior of reinforced concrete frames with brick infill", Earthq. Eng. Struct. D., 44(12), 1939-1958. https://doi.org/10.1002/eqe.2564
  12. Corte, G.D., Fiorino, L. and Mazzolani, F. (2008), "Lateralloading tests on a real rc building including masonry infill panels with and without frp strengthening", J. Mater. Civ. Eng., 20(6), 419-431. https://doi.org/10.1061/(ASCE)0899-1561(2008)20:6(419)
  13. Elwood, K.J. and Moehle, J.P. (2005), "Axial capacity model for shear-damaged columns", ACI Struct. J., 102(4), 578-587.
  14. Eurocode (2004), Design of structures for earthquake resistance. Part 1: General rules, Seismic actions and Rules for buildings, European Committee for Standardization; Brussels, Belgium.
  15. Erdem, I., Akyuz, U., Ersoy, U. and Ozcebe, G. (2006), "An experimental study on two different strengthening techniques for rc frames", Eng. Struct., 28(13), 1843-1851. https://doi.org/10.1016/j.engstruct.2006.03.010
  16. Erol, G., Karadogan, H.F. and Cili, F. (2012), "Seismic strengthening of infilled reinforced concrete frames by cfrp", 15th World Conference on Earthquake Engineering, Lisbon, Portugal, September.
  17. Fardis, M.N. and Panagiotakos, T.B. (1997), "Seismic design and response of bare and masonry-infilled reinforced concrete buildings. Part II: Infilled structures", J. Earthq. Eng., 1(3), 475-503. https://doi.org/10.1080/13632469708962375
  18. FEMA (1998), Evaluation of earthquake-damaged concrete and masonry wall building-basic procedures manual, Federal Emergency Management Agency,Washington, D.C.
  19. Fiorato, A.E., Sozen, M.A. and Gamble, W.L. (1970), "An investigation on the interaction of reinforced concrete frames with masonry filler walls", Report UILU-ENG 70-100, University of Illinois-Urbana Champaign, IL.
  20. Gomez-Martinez, F., Perez-Garcia, A., De Luca, F., Verderame, G. M. and Manfredi, G. (2012), "Preliminary study of the structural role played by masonry infills on rc building performances after the 2011 lorca, spain, earthquake", 15th World Conference on Earthquake Engineering, Lisbon, Portugal, September.
  21. Haselton, C.B. and Deierlein, G.G. (2007), "Assessing seismic collapse safety of modern reinforced concrete momentframe buildings", Report No. 152, John A. Blume Earthquake Engineering Center, Stanford University, CA.
  22. Hassan, A.F. and Sozen, M.A. (1997), "Seismic vulnerability assessment of low-rise buildings in regions with infrequent earthquakes", ACI Struct. J., 94(1), 31-39.
  23. Kyriakides, M.A. and Billington, S.L. (2008), "Seismic retrofit of masonry-infilled non-ductile reinforced concrete frames using sprayable ecc", 14th World Conference on Earthquake Engineering, Beijing, China, October.
  24. Lee, H.S. and Woo, S. (2002), "Effect of masonry infills on seismic performance of a 3-storey r/c frame with non-seismic detailing", Earthq. Eng. Struct. D., 31(2), 353-378. https://doi.org/10.1002/eqe.112
  25. Lukkunaprasit, P. and Srechai, J. (2012), "A low cost retrofit scheme for masonry-infilled non-ductile reinforced concrete frames", 15th World Conference on Earthquake Engineering, Lisbon, Portugal, September.
  26. Lukkunaprasit, P., Ruangrassamee, A., Boonyatee, T., Chintanapakdee, C., Jankaew, K., Thanasisathit, N. and Chandrangsu, T. (2016), "Performance of structures in the Mw 6.1 Mae Lao earthquake in Thailand on May 5, 2014 and implications for future construction", J. Earthq. Eng., 20(2), 219-242. https://doi.org/10.1080/13632469.2015.1051636
  27. Mainstone, R.J. (1971), "On the stiffnesses and strengths of infilled frames", Proceedings of the Institution of Civil Engineers, Supplement (iv), 57-90.
  28. Mehrabi, A., Benson Shing, P., Schuller, M. and Noland, J. (1996), "Experimental evaluation of masonry-infilled rc frames", J. Struct. Eng., 122(3), 228-237. https://doi.org/10.1061/(ASCE)0733-9445(1996)122:3(228)
  29. Mostafaei, H. and Kabeyasawa, T. (2004), "Effect of infill masonry walls on the seismic response of reinforced concrete buildings subjected to the 2003 bam earthquake strong motion: A case study of bam telephone center", Bull. Earthq. Res. Inst., 79(3), 133-156.
  30. Panagiotakos, T.B. and Fardis, M.N. (1996), "Seismic response of infilled rc frames structures", 11th World Conference on Earthquake Engineering, Acapulco, Mexico, June.
  31. Patwardhan, C. (2005), "Shear strength and deformation modeling of reinforced concrete columns", Master Thesis, The Ohio State University, OH.
  32. Paulay, T. and Priestly, M.J.N. (1992), Seismic Design of Reinforced Concrete and Masonry Buildings, John Wiley & Sons, NY.
  33. Pinto, A.V. and Taucer, F. (2006), "Assessment and retrofit of fullscale models of existing rc frames", Advances in Earthquake Engineering for Urban Risk Reduction, Springer, Dordrecht.
  34. Pujol, S. and Fick, D. (2010), "The test of a full-scale three-story rc structure with masonry infill walls", Eng. Struct., 32(10), 3112-3121. https://doi.org/10.1016/j.engstruct.2010.05.030
  35. Sezen, H., Whittaker, A.S., Elwood, K.J. and Mosalam, K.M. (2003), "Performance of reinforced concrete buildings during the august 17, 1999 Kocaeli, turkey earthquake, and seismic design and construction practise in turkey", Eng. Struct., 25(1), 103-114. https://doi.org/10.1016/S0141-0296(02)00121-9
  36. Shing, P., Stavridis, A., Koutromanos, I., Willam, K., Blackard, B., Kyriakides, M., Billington, S. and Arnold, S. (2009), "Seismic performance of non-ductile rc frames with brick infill", Improving the seismic performance of existing buildings and other structures, San Francisco, CA, December.
  37. Shing, P.B. and Mehrabi, A.B. (2002), "Behaviour and analysis of masonry-infilled frames", Progr. Struct. Eng. Mater, 4(3), 320-331. https://doi.org/10.1002/pse.122
  38. Srechai, J. and Lukkunaprasit, P. (2013), "An innovative scheme for retrofitting masonry-infilled non-ductile reinforced concrete frames", The IES J. Part A: Civ. Struct. Eng., 6(4), 277-289. https://doi.org/10.1080/19373260.2013.821716
  39. Smith, B.S., and Carter, C. (1969), "A method of analysis for infilled frames", Proc. Inst. Civ. Engineers, 44(1), 31-48. https://doi.org/10.1680/iicep.1969.7290
  40. Stavridis, A. and Shing, P.B. (2012), "Simplified modeling of masonry-infilled rc frames subjected to seismic loads", 15th World Conference on Earthquake Engineering, Lisbon, Portugal, September.
  41. Uva, G., Raffaele, D., Porco, F. and Fiore, A. (2012), "On the role of equivalent strut models in the seismic assessment of infilled rc buildings", Eng. Struct., 42, 83-94. https://doi.org/10.1016/j.engstruct.2012.04.005
  42. Yuksel, E., Ozkaynak, H., Buyukozturk, O., Yalcin, C., Dindar, A. A., Surmeli, M. and Tastan, D. (2010), "Performance of alternative cfrp retrofitting schemes used in infilled rc frames", Constr. Build. Mater., 24(4), 596-609. https://doi.org/10.1016/j.conbuildmat.2009.09.005

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