Global Restraint in Ultra-Lightweight Buckling-Restrained Braces
Publication: Journal of Composites for Construction
Volume 17, Issue 1
Abstract
A concept for an ultra-lightweight buckling-restrained brace was conceived, and a prototype was designed that utilized an aluminum core and bundled glass fiber-reinforced polymer pultruded tubes for the buckling restraint. Prediction of global stability in compression was made using analytical methods based on single-degree-of-freedom (SDOF) and previously established Euler buckling models. Detailed finite-element simulations of the proposed prototypes utilized a constitutive model calibrated from experimentally obtained reversed cyclic coupon testing of 6061-T6511 aluminum alloy at 2–4% total strain amplitude. Analytical formulations were compared with monotonic and cyclic numerical results from a parametric study varying restrainer stiffness, end moments induced by frame drift, and core reduced section length. The study concluded that SDOF and Euler formulations may underestimate the required restrainer stiffness by a factor of two or greater. The resulting ultra-lightweight brace prototypes satisfying global buckling restraint were calculated to weigh 27 and 41% of traditional mortar-filled tube and all-steel buckling-restrained brace (BRB) configurations, respectively.
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References
Accord, N. B., and Earls, C. J. (2006). “Use of fiber-reinforced polymer composite elements to enhance structural steel member ductility.” J. Compos. Constr., 10(4), 337–344.
AISC. (2010). Seismic provisions for structural steel buildings, AISC, Chicago.
ASCE. (2010). Minimum design loads forbuildings and other structures, ASCE, Reston, VA.
ASTM. (2004). “E 606 standard practice for strain-controlled fatigue testing.” Annual book of ASTM standards, Vol. 3.01, ASTM International, West Conshohocken, PA.
Black, C. J., Makris, N., and Aiken, I. D. (2002). “Component testing, stability analysis and characterization of buckling-restrained braces.”, University of California, Berkeley, CA.
Black, C. J., Makris, N., and Aiken, I. D. (2004). “Component testing, seismic evaluation and characterization of buckling-restrained braces.” J. Struct. Eng., 130(6), 880–894.
Brando, G., De Matteis, G., and Mazzolani, F. M. (2009). “Simplified analytical modeling of compact pure aluminum shear panels.” Stessa 2009: Proc., 6th Int. Conf. on Behaviour of Steel Structures in Seismic Areas, Philadelphia, CRC Press/Balkema, AK Leiden, The Netherlands, 829–834.
Chao, C. C., and Chen, S. Y. (2009). “Subassemblage tests and finite element analyses of sandwiched buckling-restrained braces with a replaceable core.” Stessa 2009: Proc., 6th Int. Conf. on Behaviour of Steel Structures in Seismic Areas, Philadelphia, CRC Press/Balkema, AK Leiden, The Netherlands, 945–951.
D’Aniello, M., Della Corte, G., and Mazzolani, F. (2008). “Experimental tests of a real building seismically retrofitted by special buckling-restrained braces.” 2008 Seismic Engineering Conf. Commemorating the 1908 Messina and Reggio Calabria Earthquake, Reggio Calabria, Italy, American Institute of Physics, Melville, NY, 1513–1520.
D’ Aniello, M., Della Corte, G., and Mazzolani, F. M. (2009). “All-steel buckling-restrained braces for seismic upgrading of existing reinforced concrete buildings.” Stessa 2009: Proc., 6th Int. Conf. on Behaviour of Steel Structures in Seismic Areas, Philadelphia, CRC Press/Balkema, AK Leiden, The Netherlands, 561–566.
Dusicka, P., Itani, A. M., and Buckle, I. G. (2007). “Cyclic response of plate steels under large inelastic strains.” J. Constr. Steel Res., 63(2), 156–164.
Dusicka, P., and Wiley, B. (2008). “Concept of buckling restraint of steel braces with fiber reinforced polymers.” Proc., 2008 Structures Conf., Vancouver, BC, Curran Associates, Inc., Red Hook, NY, 2308–2314.
Ekiz, E., and El-Tawil, S. (2008). “Restraining steel brace buckling using a carbon fiber-reinforced polymer composite system: Experiments and computational simulation.” J. Compos. Constr., 12(5), 562–569.
El-Tawil, S., and Ekiz, E. (2009). “Inhibiting steel brace buckling using carbon fiber-reinforced polymers: Large-scale tests.” J. Struct. Eng., 135(5), 530–538.
Ekiz, E., El-Tawil, S., Parra-Montesinos, G., and Goel, S. (2004). “Enhancing plastic hinge behavior in steel flexural members using CFRP wraps.” Proc., 13th World Conf. on Earthquake Engineering, Paper No. 2496, Vancouver, BC, International Association of Earthquake Engineering (IAEE), Tokyo, Japan.
Fahnestock, L. A., Sause, R., and Ricles, J. M. (2007). “Experimental evaluation of a large-scale buckling-restrained braced frame.” J. Struct. Eng., 133(9), 1205–1214.
FEMA. (2000)., FEMA, Berkeley, CA.
Harries, K. A., Peck, A. J., and Abraham, E. J. (2009). “Enhancing stability of structural steel sections using FRP.” Thin Walled Struct., 47(10), 1092–1101.
Hopperstad, O. S., Langseth, M., and Remseth, S. (1995). “Cyclic stress-strain behavior of alloy AA6060, Part I: Uniaxial experiments and modelling.” Int. J. Plast., 11(6), 725–739.
Ju, Y. K., Kim, M., Kim, J., and Kim, S. (2009). “Component tests of buckling-restrained braces with unconstrained length.” Eng. Struct., 31(2), 507–516.
Mazzolani, F. M., Della Corte, G., and D’Aniello, M. (2009). “Experimental analysis of steel dissipative bracing systems for seismic upgrading.” J. Civ. Eng. Manage., 15(1), 7–19.
Mazzolani, F. M., Della Corte, G., and Faggiano, B. (2004). “Seismic upgrading of RC buildings by means of advanced techniques: The ILVA-IDEM project.” Proc., 13th World Conf. on Earthquake Engineering, Paper No. 2703, Vancouver, BC, International Association of Earthquake Engineering (IAEE), Tokyo, Japan.
Palazzo, G., Lopez-Almansa, F., Cahis, X., and Crisafulli, F. (2009). “A low-tech dissipative buckling restrained brace. Design, analysis, production and testing.” Eng. Struct., 31(9), 2152–2161.
Rai, D. C. (2002). “Inelastic cyclic buckling of aluminum shear panels.” J. Eng. Mech., 128(11), 1233–1237.
Rai, D. C., and Wallace, B. J. (2000). “Aluminum shear-link for seismic energy dissipation.” Proc., 12th World Conf. on Earthquake Engineering, Paper No. 0279, Auckland, New Zealand, International Association of Earthquake Engineering (IAEE), Tokyo, Japan.
Shaat, A., and Fam, A. (2006). “Axial loading tests on short and long hollow structural steel columns retrofitted using carbon fibre reinforced polymers.” Can. J. Civ. Eng., 33(4), 458–470.
Shaat, A., and Fam, A. (2007). “Fiber-element model for slender HSS columns retrofitted with bonded high-modulus composites.” J. Struct. Eng., 133(1), 85–95.
Shaat, A., and Fam, A. (2009). “Slender steel columns strengthened using high-modulus CFRP plates for buckling control.” J. Compos. Constr., 13(1), 2–12.
Simulia. (2010). Abaqus users manual v. 6.10.2, Dassault Systems Simulia, Providence, RI.
Skinner, R. I., Kelly, M. J., and Heine, A. J. (1975). “Hysteretic dampers for earthquake-resistant structures.” Earthquake Eng. Struct. Dyn., 3(3), 287–296.
Tremblay, R., Bolduc, P., Neville, R., and DeVall, R. (2006). “Seismic testing and performance of buckling-restrained bracing systems.” Can. J. Civ. Eng., 33(2), 183–198.
Usami, T., Ge, H., and Luo, X. (2008). “Overall buckling prevention condition of buckling restrained braces as a structural control damper.” Proc., 14th World Conf. on Earthquake Engineering, Beijing, China, International Association of Earthquake Engineering (IAEE), Tokyo, Japan.
Wada, A., Saeki, E., Takeuchi, T., and Watanabe, A. (1989). “Development of unbonded brace.”, Nippon Steel, Japan.
Watanabe, A., Hitomoi, Y., Saeki, E., Wada, A., and Fujimoto, M. (1988). “Properties of braces encased in buckling-restraining concrete and steel tube.” 9th World Conf. on Earthquake Engineering, Vol. IV, Tokyo-Kyoto, Japan, International Association of Earthquake Engineering (IAEE), Tokyo, Japan, 719–724.
Watanabe, A., and Nakamura, H. (1992). “Study on the behavior of buildings using steel with low yield point.” Proc., 10th World Conf. on Earthquake Engineering, Balkema, Rotterdam, Netherlands, 4465–4468.
Xie, Q. (2005). “State of the art of buckling-restrained braces in Asia.” J. Constr. Steel Res., 61(6), 727–748.
Zhao, X., and Zhang, L. (2007). “State-of-the-art review on FRP strengthened steel structures.” Eng. Struct., 29(8), 1808–1823.
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© 2013 American Society of Civil Engineers.
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Received: Mar 22, 2012
Accepted: Jul 23, 2012
Published online: Aug 7, 2012
Published in print: Feb 1, 2013
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