Smart Structures and Systems

  • 제9권3호
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  • Pages.207-230
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  • 2012
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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Seismic and vibration tests for assessing the effectiveness of GFRP for retrofitting masonry structures

  • Michelis, Paul (Institute of Mechanics of Material & Geostructures S.A.) ;
  • Papadimitriou, Costas (University of Thessaly, Department of Mechanical Engineering) ;
  • Karaiskos, Grigoris K. (University of Thessaly, Department of Mechanical Engineering) ;
  • Papadioti, Dimitra-Christina (University of Thessaly, Department of Mechanical Engineering) ;
  • Fuggini, Clemente (D'Appolonia S.p.A., Industrial Innovation Division)
  • 투고 : 2011.10.01
  • 심사 : 2012.02.10
  • 발행 : 2012.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Full-scale shake table seismic experiments and low-amplitude vibration tests on a masonry building are carried out to assess its seismic performance as well as study the effectiveness of a new multifunctional textile material for retrofitting masonry structures against earthquakes. The un-reinforced and the retrofitted with glass fiber reinforced polymer (GFRP) strips masonry building was subjected to a series of earthquake excitations of increasing magnitude in order to progressively induce various small, moderate and severe levels of damage to the masonry walls. The performance of the original and retrofitted building states is evaluated. Changes in the dynamic characteristics (lowest four modal frequencies and damping ratios) of the building are used to assess and quantify the damage states of the masonry walls. For this, the dynamic modal characteristics of the structure states after each earthquake event were estimated by performing low-amplitude impulse hammer and sine-sweep forced vibration tests. Comparisons between the modal results calculated using traditional accelerometers and those using Fiber Bragg Grating (FBG) sensors embedded in the reinforcing textile were carried on to investigate the reliability and accuracy of FBG sensors in tracking the dynamic behaviour of the building. The retrofitting actions restored the stiffness characteristics of the reinforced masonry structure to the levels of the original undamaged un-reinforced structure. The results show that despite a similar dynamic behavior identified, corresponding to reduction of the modal frequencies, the un-reinforced masonry building was severely damaged, while the reinforced masonry building was able to withstand, without visual damage, the induced strong seismic excitations. The applied GFRP reinforcement architecture for one storey buildings was experimentally proven reliable for the most severe earthquake accelerations. It was easily placed in a short time and it is a cost effective solution (covering only 20% of the external wall surfaces) when compared to the cost for full wall coverage by GFRPs.

키워드

참고문헌

  1. Agarwal, P. and Thakkar, S.K. (2004), "A comparative study of strengthening and retrofitting measures for unreinforced brick masonry model under cyclic testing", J. Earthq. Eng., 8, 839-863.
  2. Albert, M.L., Elwi, A.E. and. Cheng, J.J.R. (2001), "Strengthening of unreinforced masonry walls using FRPs", J. Compos. Constr., 5(2), 76-84. https://doi.org/10.1061/(ASCE)1090-0268(2001)5:2(76)
  3. Bastianini, F., Corradi, M., Borri, A. and. Tommaso, A.D. (2005), "Retrofit and monitoring of an historical building using 'smart' CFRP with embedded fibre optic Brillouin sensors", Constr. Build. Mater., 19, 525-535. https://doi.org/10.1016/j.conbuildmat.2005.01.004
  4. Benedetti, D. Carydis, P. and Limongelli, P. (2001), "Evaluation of the seismic response of masonry buildings based on energy functions", Earthq. Eng. Struct. D., 30(7), 1061-1081. https://doi.org/10.1002/eqe.52
  5. Beni, F., Lagomarsino, S., Marazzi, F., Magonette, G. and Podestà, S. (2003), "Structural monitoring through dynamic identification", Proceedings of the 3rd World Conf. on Structural Control, Wiley, Chichester, U.K.
  6. Casciati, S. and Faravelli, L. (2010), "Vulnerability assessment for medieval civil towers", Struct. Infrastruct. E., 6(1-2), 193-203. https://doi.org/10.1080/15732470802664290
  7. Casciati, S. (2010), "Response surface models to detect and localize distributed cracks in a complex continuum", J. Eng. Mech. - ASCE, 136(9), 1131-1142. https://doi.org/10.1061/(ASCE)EM.1943-7889.0000148
  8. Casciati, S. and Hamdaoui, K. (2008), "Experimental and numerical studies toward the implementation of shape memory alloy ties in masonry structures", Smart Struct. Syst., 4(2), 153-169. https://doi.org/10.12989/sss.2008.4.2.153
  9. Casciati, S. and Al-Saleh, R. (2010), "Dynamic behavior of a masonry civic belfry under operational conditions", ACTA Mech., 215(1-4), 211-224. https://doi.org/10.1007/s00707-010-0343-4
  10. CNR-DT 200 (2004), Guide for the design and construction of externally bonded FRP systems for strengthening existing structures, National Research Council, Rome, July.
  11. COMSOL AB (2005), COMSOL Multiphysics User's Guide, (http://www.comsol.com/).
  12. Fam, A., Musiker, D., Kowalsky, M. and. Rizkalla, S. (2002), "In-plane testing of damaged masonry wall repaired with FRP", Adv. Compos. Lett., 11(6), 275-281.
  13. Juang J.N. and. Pappa, R.S. (1985), "An eigensystem realization algorithm for modal parameter identification and model reduction", J. Guid. Control. Dynam., 8(5), 620-627. https://doi.org/10.2514/3.20031
  14. Kiss, R.M., Kollar, L.P., Jai, J. and Krawinkler, H. (2002a), "Masonry strengthened with FRP subjected to combined bending and compression. Part II: Test results and model predictions", J. Compos. Mater., 36(9), 1049-1063. https://doi.org/10.1177/0021998302036009475
  15. Kiss, R.M., Kollar, L.P, Jai, J. and Krawinkler, H. (2002b), "FRP strengthened masonry beams. Part I: Model", J. Compos. Mater., 36(5), 521-536. https://doi.org/10.1177/0021998302036005474
  16. Liu, J., Liu, M. and Song, Y. (2007), "Experimental investigation on flexural performance of masonry walls reinforced with GFRP", J. Wuhan Univ.Technol., 22, 82-84. https://doi.org/10.1007/s11595-005-1082-6
  17. Marcari, G., Manfredi, G., Prota,A. and Pecce, M. (2007), "In-plane shear performance of masonry panels strengthened with FRP", Compos. Part B - Eng., 38(7-8), 887-901. https://doi.org/10.1016/j.compositesb.2006.11.004
  18. Messervey, T.B., Zangani, D. and Fuggini, C. (2010), "Sensor-embedded textiles for the reinforcement, dynamic characterisation, and structural health monitoring of masonry structures", Proceedings of the 5th EWSHM 2010, Sorrento, Italy, June.
  19. Mosallam, A.S. (2007), "Out-of-plane flexural behavior of unreinforced red brick walls strengthened with FRP composites", Compos. Part B - Eng., 38(5-6), 559-574. https://doi.org/10.1016/j.compositesb.2006.07.019
  20. Ntotsios, E. (2009), Modal identification of structures using ambient vibrations: Theory, software and applications, MSc Thesis, University of Thessaly, Department of Mechanical Engineering, Greece.
  21. Paquette, J., Bruneau, M. and Brzev, S. (2004), "Seismic testing of repaired unreinforced masonry building having flexible diaphragm", J. Struct. Eng. - ASCE, 130(10), 1487-1496. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:10(1487)
  22. Peeters, B., Van der Auweraer, H., Guillaume, P. and Leuridan, J. (2004), "The PolyMAX frequency-domain method: A new standard for modal parameter estimation?", Shock Vib., 11(3-4), 395-409. https://doi.org/10.1155/2004/523692
  23. Salerno, G. and de Felice, G. (2009), "Continuum modeling of periodic brickwork", Int. J. Solid.Struct., 46(5), 1251-1267. https://doi.org/10.1016/j.ijsolstr.2008.10.034
  24. Stefanou, I., Sulem, J. and Vardoulakis I. (2008), "Three-dimensional Cosserat homogenization of masonry structures: elasticity", ACTA Geotech., 3(1), 71-83. https://doi.org/10.1007/s11440-007-0051-y
  25. Tan, K.H., Patoary, M.K.H. and. Roger, C.S.K. (2003), "Anchorage systems for masonry walls strengthened with FRP composite laminates", J. Reinf. Plast.Comp., 22(15), 1353-1371. https://doi.org/10.1177/073168403035582
  26. Triantafillou, T.C. (1998), "Strengthening of masonry structures using epoxy-bonded FRP laminates", J. Compos.Constr., 2, 96-104. https://doi.org/10.1061/(ASCE)1090-0268(1998)2:2(96)
  27. Turek, M., Ventura, C.E. and Kuan, S. (2007), "In-plane shake-table testing of GFRP-strengthened concrete masonry walls", Earthq. Spectra, 23(1), 223-237. https://doi.org/10.1193/1.2429564
  28. Wight, G.D., Kowalsky, M.J. and Ingham, J.M. (2007), "Shake table testing of post-tensioned concrete masonry walls with openings", J. Struct. Eng. - ASCE, 133(11), 1551-1559. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:11(1551)

피인용 문헌

  1. Experimental modal analysis of brick masonry arches strengthened prepreg composites vol.16, pp.3, 2015, https://doi.org/10.1016/j.culher.2014.06.003
  2. Malfunction diagnosis of sensors based on correlation of measurements vol.28, pp.2, 2017, https://doi.org/10.1088/1361-6501/aa52ed
  3. Plane and vaulted masonry elements strengthened by different techniques – Testing, numerical modeling and nonlinear analysis vol.15, 2018, https://doi.org/10.1016/j.jobe.2017.11.009
  4. Vibration measurement and vulnerability analysis of a power plant cooling system vol.11, pp.2, 2012, https://doi.org/10.12989/sss.2013.11.2.199