Abstract
In this study, four 1/2-scaled, 3-dimensional, 2-story, deficient reinforced concrete (RC) specimens were examined by applying reverse static-cyclic excursions. Among the specimens, one served as a reference frame, and the others were externally strengthened using buckling-restrained braced steel frames (BRBFs). Anchorage rods were used to connect the BRBFs to the RC specimens. Thus, the RC structure transferred lateral loads to the BRBFs through these rods. The BRBFs, as a novel lateral load-carrying mechanism, were able to withstand the lateral demands placed on the deficient RC structure. New foundations were constructed adjacent to the existing foundations of the RC specimens for the BRBFs. Anchorage rods were used to connect them also. In this way, both foundations carried forces induced by steel and RC members with anchorage rods. As long as the structural RC elements remained in elastic or limited plastic regions, BRBFs enhanced the rigidity, energy absorption, and load-bearing capacity of existing deficient RC buildings. Thus, the strengthened RC specimens were effective at resisting the lateral demands as well as the self-weight and dead loads on them. Numerical analyses were also carried out, and the performance criteria for strengthened RC specimens were discussed in addition to the experimental studies. Design proposals were presented for the exterior upgrading of RC buildings with BRBFs and their foundations.
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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
References
ACI 318-19 (2019) Building code requirements for structural concrete and commentary. American Concrete Institute, Farmington Hills
ASCE/SEI-41-06 (2007) Seismic rehabilitation of existing buildings. American Society of Civil Engineers, Reston
ASTM E8/E8M (2016) Standard test methods for tension testing of metallic materials. American Society for Testing and Materials, West Conshohocken
Badoux M, Jirsa JO (1990) Steel bracing of rc frames for seismic retrofitting. J Struct Eng (ASCE) 116(1):55–74. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:1(55)
Bahadir F, Kamanli M, Korkmaz HH, Balik FS, Unal A, Korkmaz SZ (2013) Strengthening of gravity load designed reinforced concrete frames with the external rc shear walls. Adv Mat Res 747:265–268. https://doi.org/10.4028/www.scientific.net/AMR.747.265
Balkaya C (2017) Invention: seismic retrofitting by exterior steel brace structural building jacketing system. In: 5th International symposium on innovative technologies in engineering and science, Baku, Azerbaijan
Black GR, Wenger BA, Popov EP (1980) Inelastic buckling of steel struts under cyclic load reversals. Research report no. UCB/EERC-80/40. College of Engineering, University of California, Berkeley, CA-USA
Bush TD, Jones EA, Jirsa JO (1991) Behavior of RC frame strengthened using structural steel bracing. J Struct Eng (ASCE) 117(4):1115–1126. https://doi.org/10.1061/(ASCE)0733-9445(1991)117:4(1115)
Cagatay IH (2005) Experimental evaluation of buildings damaged in recent earthquakes in Turkey. Eng Fail Anal 12(3):440–452. https://doi.org/10.1016/j.engfailanal.2004.02.007
Cao X-Y, Feng D-C, Wu G (2019) Seismic performance upgrade of RC frame buildings using precast bolt-connected steel-plate reinforced concrete frame-braces. Eng Struct 195:382–399. https://doi.org/10.1016/j.engstruct.2019.06.007
Cao X-Y, Feng D-C, Wu G (2021) Pushover-based probabilistic seismic capacity assessment of RCFs retrofitted with PBSPC BRBF sub-structures. Eng Struct 234:1–16. https://doi.org/10.1016/j.engstruct.2021.111919
Dhakal RP, Maekawa K (2002) Modelling for post yield buckling of reinforcement. J Struct Eng (ASCE) 128(9):1139–1147. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:9(1139)
Di Lorenzo G, Colacurcio E, Di Filippo A, Formisano A, Massimilla A, Landolfo R (2020) State of the art on steel exoskeletons for seismic retrofit of existing RC buildings. Ing Sismica Int J Earthq Eng XXXVII 1:33–49
Di Lorenzo G, Tartaglia R, Prota A, Landolfo R (2023) Design procedure for orthogonal steel exoskeleton structures for seismic strengthening. Eng Struct 275:115252. https://doi.org/10.1016/j.engstruct.2022.115252
Ecemis AS, Korkmaz HH, Dere Y (2021) Seismic performance improvement of RC buildings with external steel frames. Comput Concr 27(4):43–353. https://doi.org/10.12989/cac.2021.27.4.343
Formisano A, Massimilla A, Di Lorenzo G, Landolfo R (2020) Seismic retrofit of gravity load designed RC buildings using external steel concentric bracing systems. Eng Fail Anal 111:1–21. https://doi.org/10.1016/j.engfailanal.2020.104485
Furukawa T, Ueki R, Takino A, Inoue R, Sakaguchi A, Kurashige M, Murata Y, Tsubosaki H, Shiomi K, Imai K (2004) Experimental study on seismic retrofit of rc buildings using external steel portal frames. In: 13th World conference on earthquake engineering, Vancouver, B.C., Canada
Gorgulu T, Tama YS, Yilmaz S, Kaplan H, Ay Z (2012) Strengthening of reinforced concrete structures with external steel shear walls. J Constr Steel Res 70:226–235. https://doi.org/10.1016/j.jcsr.2011.08.010
Gutiérrez-Urzúa F, Freddi F (2022) Influence of the design objectives on the seismic performance of steel moment resisting frames retrofitted with buckling restrained braces. Earthq Eng Struct Dyn 51(13):3131–3153. https://doi.org/10.1002/eqe.3717
Hsiao F-P, Shih C-T, Chu S-Y, Liou Y-W, Huang C-C, Chiou T-C, Chiu, Y-C (2013) Field test for school building retrofitted by external steel-framing system. In: 5th International conference on advances in experimental structural engineering, Taipei, Taiwan
Islam S, Huang S, Skokan M, Mostafa K (2006) Performance based seismic retrofit of a high-rise tower using buckling restrained braced frames. In: 8th U.S. National conference on earthquake engineering, San Francisco, California, USA
Jung J-S, Lee K-S (2020) Pseudo dynamic testing of buildings retrofitted with external steel reinforced concrete frames to increase lateral strength for earthquake damage prevention. Shock Vib 2020:1–21. https://doi.org/10.1155/2020/3027094
Jung J-S, Kim K-H, Lee K-S (2021) Seismic performance of two-story RC frame retrofitted using external steel frame equipped with length-adjustment device by pseudo dynamic test. J Earthq Eng 26(12):6102–6128. https://doi.org/10.1080/13632469.2021.1911885
Kaltakci MY, Arslan MH, Yilmaz US, Arslan HD (2008) A new approach on the strengthening of primary school buildings in Turkey: an application of external shear wall. Build Environ 43(6):983–990. https://doi.org/10.1016/j.buildenv.2007.02.009
Kaltakci MY, Ozturk M, Arslan MH (2010) An experimental investigation for external rc shear wall applications. Nat Hazards Earth Syst Sci 10(9):1941–1950. https://doi.org/10.5194/nhess-10-1941-2010
Kaplan H, Yilmaz S, Cetinkaya N, Atimtay E (2011) Seismic strengthening of RC structures with exterior shear walls. Sadhana 36(1):17–34. https://doi.org/10.1007/s12046-011-0002-z
Karsan ID, Jirsa JO (1969) Behavior of concrete under compressive loadings. J Struct Div (ASCE) 95:2543–2563. https://doi.org/10.1061/JSDEAG.0002424
Kent DC, Park R (1971) Flexural members with confined concrete. J Struct Div (ASCE) 97:1969–1990. https://doi.org/10.1061/JSDEAG.0002957
Liu C, Shi J, Hiroshi K, Taguchi T, Kamiya T (2016) Experiment study on RC frame retrofitted by the external structure. Earthq Eng Eng Vib 15(3):563–574. https://doi.org/10.1007/s11803-016-0344-y
López OA, Hernández JJ, Del Re G, Puig J (2006) Seismic risk reduction of school buildings in Venezuela. In: Proceedings of the 8th U.S. national conference on earthquake engineering, San Francisco, California, USA
López OA, Hernández JJ, Del Re G, Puig J, Espinosa L (2007) Reducing seismic risk of school buildings in Venezuela. Earthq Spectra 23(4):771–790. https://doi.org/10.1193/1.2791000
Madan A, Reinhorn AM, Mander JB, Valles RE (1997) Modeling of masonry infill panels for structural analysis. J Struct Eng (ASCE) 123(10):1295–1302. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:10(1295)
Marino EM, Nakashima M (2006) Seismic performance and new design procedure for chevron-braced frames. Earthq Eng Struct Dyn 35(4):433–452. https://doi.org/10.1002/eqe.539
Maziliguney L, Yaman IO, Azili F (2008) In-situ concrete compressive strength of residential, public and military structures. In: 8th International congress on advances in civil engineering, Famagusta, North Cyprus
Mazzoni FM, McKenna H, Scott MH, Fenves GL (2007) OpenSees command language manual. Pacific Earthquake Engineering Research Center, University of California, Berkeley
Mohammadi M, Kafi MA, Kheyroddin A, Ronagh HR (2020) Performance of innovative composite buckling restrained fuse for concentrically braced frames under cyclic loading. Steel Compos Struct 36(2):163–177. https://doi.org/10.12989/scs.2020.36.2.163
Mowrtage W (2013) Parallel steel frame technique for seismic strengthening of rc structures: case study. J Earthq Tsunami 7(5):1350038-1–1350038-11. https://doi.org/10.1142/s1793431113500383
Ozcelik R (2016) Development of buckling-restrained steel braces and investigation of their use in seismic strengthening of reinforced concrete buildings. Research Report No. 118M820; Akdeniz University, Antalya, Turkey (in Turkish)
Ozcelik R, Erdil EF (2019) Pseudodynamic test of a deficient RC frame strengthened with buckling restrained braces. Earthq Spectra 35(3):1163–1187. https://doi.org/10.1193/122317EQS263M
Ozcelik R, Binici B, Kurc O (2012) Pseudo dynamic testing of an RC frame retrofitted with chevron braces. J Earthq Eng 16(4):515–539. https://doi.org/10.1080/13632469.2011.653297
Ozcelik R, Binici B, Akpinar U (2013) Seismic retrofit of non-ductile reinforced concrete frames with chevron braces. Struct Build 166(7):326–341. https://doi.org/10.1680/stbu.12.00002
Ozcelik R, Dikiciasik Y, Erdil EF (2017) The development of the buckling restrained braces with new end restrains. J Constr Steel Res 138:208–220. https://doi.org/10.1016/j.jcsr.2017.07.008
Ozcelik R, Dikiciasik Y, Civelek KB, Erdil EF, Erdal F (2020) Design of buckling restrained braces with composite technique. Steel Compos Struct 35(5):687–699. https://doi.org/10.12989/scs.2020.35.5.687
Ozkok ME (2010) Seismic upgrade of deficient reinforced concrete frames using external systems. Dissertation, Middle East Technical University
Ozkok ME, Ozcelik R, Binici B (2009) Performance comparisons of external strengthening methods for deficient RC frames. In: ATC and SEI conference on improving the seismic performance of existing buildings and other structures, San Francisco, California
Pandikkadavath MS, Sahoo DR (2017) Mitigation of seismic drift response of braced frames using short yielding-core BRBs. Steel Compos Struct 23(3):285–302. https://doi.org/10.12989/scs.2017.23.3.285
Pincheria JA, Jirsa JO (1995) Seismic response of RC frames retrofitted with steel braces or walls. J Struct Eng (ASCE) 121(8):1225–1235. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:8(1225)
Popovics S (1970) A review of stress–strain relationships for concrete. Am Concr Inst J 67(3):243–248
Reggio A, Restuccia L, Martelli L, Ferro GA (2019) Seismic performance of exoskeleton structures. Eng Struct 198:1–11. https://doi.org/10.1016/j.engstruct.2019.109459
Shih CT, Chu SY, Liou YW, Hsiao FP, Huang CC, Chiou TC, Chiou YC (2015) In situ test of school buildings retrofitted with external steel-framing systems. J Struct Eng (ASCE) 141(1):D4014002-1-D4014002-18. https://doi.org/10.1061/(asce)st.1943-541x.0001063
Stratan A, Zub CI, Dubina D (2020) Prequalification of a set of buckling restrained braces: part I experimental tests. Steel Compos Struct 34(4):547–559. https://doi.org/10.12989/scs.2020.34.4.547
Sucuoglu, H., Jury, R., Ozmen, A., Hopkins, D., Ozcebe, G. and Kubin, J. (2006) Developing retrofit solutions for the residential building stocks in Istanbul. In: 8th U.S. national conference on earthquake engineering, San Francisco, California, USA
Sutcu F, Bal A, Fujishita K, Matsui R, Celik OC, Takeuchi T (2020) Experimental and analytical studies of sub-standard RC frames retrofitted with buckling-restrained braces and steel frames. Bull Earthq Eng 18(5):2389–2410. https://doi.org/10.1007/s10518-020-00785-4
Talaat M, Mosalam KM (2009) Modelling progressive collapse in reinforced concrete buildings using direct element removal. Earthq Eng Struct Dyn 38(5):609–634. https://doi.org/10.1002/eqe.898
TBEC (2018) Turkey building earthquake code. Ministry of Interior Disaster and Emergency Management Presidency, Ankara (in Turkish)
TEC (2007) Regulation on buildings to be constructed in earthquake zones. Ministry of Public Works and Settlement, Ankara, Turkey. (In Turkish)
Tezcan SS, Ipek M (1996) A reconnaissance report: 1995 Dinar, Turkey, earthquake. Eng Struct 18(12):906–916. https://doi.org/10.1016/0141-0296(95)00219-7
Timler PA, Sherstobotoff JG (1995) Externally mounted ductile frame, seismic retrofit for the British Coloumbia Institute of Technologhy SW1 Main Building. In: 7th Canadian conference on earthquake engineering, Montreal
Tremblay R (2002) Inelastic seismic response of steel bracing. J Constr Steel Res 58:665–701. https://doi.org/10.1016/S0143-974X(01)00104-3
TS-500 (2000) Design and construction rules of reinforced concrete structures. Turkish Standards Institute, Ankara (in Turkish)
TSSC (2018) Regulation on design, calculation, and construction of steel structures. T.C. Ministry of Environment, Urbanisation and Climate Change, Ankara (in Turkish)
Unal A, Kaltakci MY (2016) Seismic behavior of concentrically steel braced frames and their use in strengthening of reinforced concrete frames by external application. Steel Compos Struct 21(4):687–702. https://doi.org/10.12989/scs.2016.21.4.687
Unal A, Kaltakci MY, Balik FS, Korkmaz HH, Bahadir F, Korkmaz SZ, Kamanli M (2013) Strengthening of reinforced concrete frames not designed according to TDY2007 with external shear walls. Adv Mat Res 747:433–436. https://doi.org/10.4028/www.scientific.net/AMR.747.433
Acknowledgements
This article reports on a study conducted at Akdeniz University's Structural Mechanics Laboratory. TUBITAK funded this study with Grant Number 116M231.
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TUBITAK funded this research (Grant Number 116M231).
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All authors contributed to the study’s conception and design. Material preparation, data collection, and analysis were performed by Elif Firuze Erdil, Ramazan Ozcelik, and Ferhat Erdal. The first draft of the manuscript was written by Elif Firuze Erdil, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Erdil, E.F., Ozcelik, R. & Erdal, F. External strengthening of RC structures with buckling-restrained braced frames. Bull Earthquake Eng 22, 1931–1963 (2024). https://doi.org/10.1007/s10518-023-01836-2
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DOI: https://doi.org/10.1007/s10518-023-01836-2