Abstract
This paper reports on experimental and numerical investigations of the seismic behaviour of unreinforced concrete block masonry (URCBM) structural walls, externally retrofitted on one, or both sides, by reinforced concrete (RC) layers. The behaviour factor (R) components are extracted from nonlinear static pushover analyses of full-scale masonry walls having different aspect ratios. It is found that R-value of masonry shear wall increases with an increase in the aspect ratio of the wall. Also, application of RC layers to the wall has a profound effect on the behaviour factor, as it directly affects both ductility and ultimate capacity of the wall. Finally, based on findings presented, R-values of 2.0, 2.5 and 3.0 are proposed for URCBM, one-sided and two-sided retrofitted concrete block masonry shear wall construction, respectively.
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References
ABAQUS (2012) Documentation version 6.12. Dassault Systemes Simulia Corp. Providence, RI, USA
Abrams D, Smith T, Lynch J, Franklin S (2007) Effectiveness of rehabilitation on seismic behavior of masonry piers. Struct Eng ASCE 133(1):32–43
Alpa G, Monetto I (1994) Microstructural model for dry block masonry walls with in-plane loading. Mech Phys Solids 42(7):1159–1175
American Society of Civil Engineers (ASCE) (2010) Minimum design loads for buildings and other structures. ASCE 7, Reston, Virginia
Ascione L, Felice G, De Santis S (2015) A qualification method for externally bonded fibre reinforced cementitious matrix (FRCM) strengthening systems. Compos Part B 78:497–506
Banting B, El-Dakhakhni WW (2014) Seismic design parameters for special masonry structural walls detailed with confined boundary elements. Struct Eng ASCE 140(10):04014067(1-14)
Belarbi H, Hsu TCC (1994) Constitutive laws of concrete in tension and reinforcing bars stiffened by concrete. J Struct Div ACI 91(4):465–474
Borri A, Castori G, Corradi M (2011) Shear behavior of masonry panels strengthened by high strength steel cords. Constr Build Mater 25(2):494–503
Borzi B, Elnashai AS (2000) Refined force reduction factors for seismic design. Eng Struct 22:1244–1260
CEN Eurocode 8 (2004) Design provisions for earthquake resistance of structures Brussels (Belgium): Comité Européen de Normalisation
Corradi M, Tedeschi C, Binda L, Borri A (2008) Experimental evaluation of shear and compression strength of masonry wall before and after reinforcement: deep repointing. Constr Build Mater 22(4):463–472
Cuesta I, Aschheim MA (2001) Isoductile strengths and strength reduction factors of elasto-plastic SDOF systems subjected to simple waveforms. Earthq Eng Struct Dyn 30:1043–1059
Dehghani A, Fischer G, NateghiAlahi F (2015) Strengthening masonry infill panels using engineered cementitious composites. Mater Struct 48:185–204
Drysdale RG, Hamid AA, Heidebrechi AC (1979) Tensile strength of concrete masonry. J Struct Div ASCE 7:1261–1276
ElGawady MA, Lestuzzi P, Badoux M (2006a) A seismic retrofitting of unreinforced masonry walls using FRP. Compos Part B 37:148–162
ElGawady MA, Lestuzzi P, Badoux M (2006b) Retrofitting of masonry walls using shotcrete. In: Proc. New Zealand Society for Earthquake Engineering (NZSEE) Conf., Napier, New Zealand, Paper No. 45
ElGawady MA, Lestuzzi P, Badoux M (2007) Static cyclic response of masonry walls retrofitted with fiber-reinforced polymers. Compos Constr ASCE 11(1):50–61
Federal Emergency Management Agency (FEMA) (2000) Prestandard and commentary for the seismic rehabilitation of buildings. Report, FEMA 356, Washington (DC)
Ghiassi B, Soltani M, Tasnimi AA (2012) Seismic evaluation of masonry structures strengthened with reinforced concrete layers. Struct Eng ASCE 138(6):729–743
Giambanco G, Di Gati L (1997) A cohesive interface model for the structural mechanics of block masonry. Mech Res Commun 24(5):503–512
Gillie JL, Marek AR, McDaniel C (2010) Strength reduction factors for near-fault forward-directivity ground motions. Eng Struct 32:273–285
Haach VG, Vasconcelos G, Lourenço PB (2010) Experimental analysis of reinforced concrete block masonry walls subjected to in-plane cyclic loading. Struct Eng ASCE 136(4):452–462
Haach VG, Vasconcelos G, Lourenço PB (2011) Parametrical study of masonry walls subjected to in-plane loading through numerical modeling. Eng Struct 33(4):1377–1389
Iranian code of practice for seismic resistance design of buildings (2014) Standard No. 2800, 4th edn. Building and Housing Research Center (BHRC), Iran
Kahn L (1984) Shotcrete retrofit for unreinforced brick masonry. In: Proc. 8th world conf. on earthquake engineering. Earthquake Engineering Research Institute, San Francisco, pp 583–590
Kappos AJ (1999) Evaluation of behaviour factors on the basis of ductility and overstrength studies. Eng Struct 21(9):823–835
Karantoni FV, Fardis MN (1992) Effectiveness of seismic strengthening techniques for masonry buildings. Struct Eng ASCE 118(7):1884–1902
Kent DC, Park R (1971) Flexural members with confined concrete. Struct Eng ASCE 97(7):1969–1990
Levy R, Rutenberg A, Qadi Kh (2006) Equivalent linearization applied to earthquake excitation and the R – μ − T0 relationship. Eng Struct 28(2):216–228
Lourenço PB (1996) Computational strategies for masonry structures. Ph.D. Dissertation, Department of Civil Engineering, Delft University, Netherland. <www.civil.uminho.pt/masonry>
Maheri MR, Akbari R (2003) Seismic behavior factor, R, for steel X-braced and knee-braced RC buildings. Eng Struct 25(12):1505–1513
Maheri MR, Najafgholipour MA, Rajabi AR (2011a) The influence of mortar head joints on the in-plane and out-of-plane seismic strength of brick masonry walls. Iran J Sci Technol Trans B Eng 35(1):63–79
Maheri MR, Motielahi F, Najafgholipour MA (2011b) The effect of pre and post construction moisture condition on the in-plane and out-of-plane strengths of brick wall. Mater Struct 44:541–559
Maheri Mahmoud R, Pourfallah S, Azarm R (2012) Seismic retrofitting methods for the jack arch masonry slabs. Eng Struct 36:49–60
Mayes RL, Clough RW (1975) State-of-the-art in seismic shear strength of masonry—an evaluation and review. EERC 75-21, College of Engineering, University of California
Medeiros P, Vasconcelos G, Lourenço PB, Gouveia J (2012) Numerical modelling of non-confined and confined masonry walls. Constr Build Mater 41:968–976
Minaie E, Mota M, Moon FL, Hamid AA (2010) In-plane behavior of partially grouted reinforced concrete masonry shear walls. Struct Eng ASCE 136(9):1089–1097
Miranda E (1993) Site-dependent strength reduction factor. J Struct Eng ASCE 119(12):3503–3519
Moon FL, Yi T, Leon RT, Kahn L (2007) Testing of a full-scale unreinforced masonry building following seismic strengthening. Struct Eng ASCE 133(9):1215–1226
Mosallam A, Banerjee S (2011) Enhancement in in-plane shear capacity of unreinforced masonry (URM) walls strengthened with fiber reinforced polymer composites. Compos Part B 42(6):1657–1670
Nassar AA, Krawinkler H (1991) Seismic demands for SDOF and MDOF systems. Report No. 95. Stanford, California: The John A. Blume Earthquake Engineering Center, Stanford University
National Building Code of Canada (NBCC) (2010) National building code of Canada. Institute for research in construction, National Research Council of Canada, Ottawa, Ont
Newmark NM, Hall WJ (1982) Earthquake spectra and design. El Cerrito, California: earthquake engineering research institute (EERI)
Niroomandi A, Maheri A, Maheri MR, Mahini SS (2010) Seismic performance of ordinary RC frames retrofitted at joints by FRP sheets. Eng Struct 32(8):2326–2336
Oliveira DV, Basilio I, Lourenço PB (2011) Experimental bond behavior of FRP sheets glued on brick masonry. Compos Constr ASCE 15(1):32–41
OPCM. n. 3431 (2005) Ulteriori modifiche ed integrazioni all’Ordinanza n.3274 del 20/3/2003, recante ‘Primi elementi in materia di criteri generali per la classificazione sismica del territorio nazionale e di normative tecniche per le costruzioni in zona sismica’” S.O. n.85 alla G.U. n.107 del 10/5/2005
Ordaz M, Perez-Rocha LE (1998) Estimation of strength-reduction factors for elastoplastic systems: a new approach. Earthq Eng Struct Dyn 27:889–901
Ortlepp R, Hampel U, Curbach M (2006) A new approach for evaluating bond capacity of TRC strengthening. Cem Concr Compos 28:589–597
Papanicolaou CG, Triantafillou TC, Karlos K, Papathanasiou M (2007) Textile-reinforced mortar (TRM) versus FRP as strengthening material of URM walls: in-plane cyclic loading. Mater Struc 40:1081–1097
Park R, Paulay T (1975) Reinforced concrete structures. Wiley, New York
Paulay T, Priestley MJN (1992) Seismic design of reinforced concrete and masonry buildings. Wiley, New York
Priestley MJN (2000) Performance based seismic design. In: Proc. 12th world conf. on earthquake engineering, Auckland, New Zealand
Priestley MJN, Seible F, Calvi GM (1996) Seismic design and retrofit of bridges. Wiley, New York
Priestley MJN, Calvi GM, Kowalsky MJ (2007) Displacement-based seismic design of structures. IUSS Press, Pavia
Rahman MA, Anand SC (1994) Empirical Mohr-Coulomb failure criterion for concrete block-mortar joints. Struct Eng ASCE 120(8):2408–2422
Riddell R, Newmark N (1979) Statistical analysis of the response of nonlinear systems subjected to earthquakes. Structural research series no. 468; Dept. of Civil Engineering, University of Illinois; Urbana, USA
Shedid MT, El-Dakhakhni WW, Drysdale RG (2009) Behavior of fully grouted reinforced concrete masonry shear walls failing in flexure: analysis. Eng Struct 31:2032–2044
Shedid MT, El-Dakhakhni WW, Drysdale RG (2010a) Seismic performance parameters for reinforced concrete-block shear wall construction. J Perform Constr Facil ASCE 24:4–18
Shedid MT, El-Dakhakhni WW, Drysdale RG (2010b) Alternative strategies to enhance the seismic performance of reinforced concrete-block shear wall systems. Struct Eng ASCE 136(6):676–689
Shedid MT, El-Dakhakhni WW, Drysdale RG (2011) Seismic response modification factors for reinforced masonry structural walls. J Perform Constr Facil ASCE 25:74–86
Smith A, Redman T (2009) A critical review of retrofitting methods for unreinforced masonry structures. In: Proc. EWB-UK research conf., Royal Academy of Engineering, University of Bristol, UK
Tena-Colunga A, Juarez-Angeles A, Salinas-Vallejo VH (2009) Cyclic behavior of combined and confined masonry walls. Eng Struct 31(1):240–259
Tomazevic M (1999) Earthquake-resistant design of masonry buildings. Imperial College Press, London
Tomazevic M (2009) Shear resistance of masonry walls and Eurocode 6: shear versus tensile strength of masonry. Mater Struct 42(7):889–907
Tomazevic M, Klemenc I (1997) Seismic behaviour of confined masonry walls. Earthq Eng Struct Dyn 26(10):1059–1071
Uang C (1991) Establishing R (or R w ) and C d factors for building seismic provisions. Struct Eng ASCE 117(1):19–28
Vidic T, Fajfar P, Fischinger M (1994) Consistent inelastic design spectra: strength and displacement. Earthq Eng Struct Dyn 23:507–521
Zhai CH, Xie LL (2006) Study on strength reduction factors considering the effect of classification of design earthquake. Acta Seismol Sin 28(3):284–294
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Khajeheian, M.K., Maheri, M.R. Seismic Behaviour Factor for Unreinforced Concrete Block Masonry Walls Retrofitted by RC Layers. Iran J Sci Technol Trans Civ Eng 41, 389–404 (2017). https://doi.org/10.1007/s40996-017-0064-1
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DOI: https://doi.org/10.1007/s40996-017-0064-1