Behavior of Modified Long Links with Supplemental Double Stiffeners on Eccentrically Braced Frames

Musbar Musbar, Bambang Budiono, Dyah Kusumastuti, Herlien D Setio


Initial failure of long links caused by fracturing and buckling occurs on the flange and web at the end of the link. Local damages are caused by the influence of the dominant bending moments compared to shear forces. The advantage of using long links includes allowing for larger openings in rooms, which makes it popular among architects. Efforts to prevent these specific failures are not covered in the rules, and there are few types of research that examine improving the performance of long links. The focus of this study is to provide information on using supplemental double stiffeners at the ends of the link without changing the long link behavior. The behavior of long links is maintained by keeping the flange failures on the flange at the end of the link. The supplemental double stiffeners improve the performance of the long link by extending the inelastic zone and slowing the failure rate of the flange. This experimental study was carried out on four models of the long link consisting of a standard model and a model modified by the addition of supplemental double stiffeners at the flange. Long link models were modified with variable thickness and holes width on the supplemental double stiffeners. The results showed that the addition of the supplemental double stiffeners improved the performance of long links compared to the standard link that is by the requirements of AISC 341-10. The supplemental double stiffeners are an alternative to improved long link performance, making it more effective in the application of its use in steel construction. 


supplemental double stiffeners; thickness; hole width; performance.

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A. Ghobarah and T. Ramadan, “Effect of axial forces on the performance of link in eccentrically braced frames,†Eng. Struct., 12, 1990.

K. D., Hjelmstad and E. P., Popov, “Characteristics of eccentrically braced frames,†J. Struct. Eng, 110 (2): 340-353, 1984.

M. D. Engelhardt and E. P. Popov, “Behavior of long link in an eccentrically braced frame,†Report No. UCB/EERC-89/01 Berkeley: Earthquake Engineering Research Centre, University of California, 1989.

M. D. Engelhardt and E. P. Popov, “Experimental performance of long link in eccentrically braced frames,†J. Struct. Eng., 118 (11): 3067-3088, 1992.

A. Daneshmand and B.H. Hashemi, “Performance of intermediate and long links in eccentrically braced frames,†J. Constr. Steel Res, 70: 167-176, 2012.

A. Ghobarah and T. Ramadan, “Seismic analysis of links of various lengths in eccentrically braced frames,†Can. J. Civ. Eng., 18(1): 140–8, 1991.

D. Ozhendekci and N. Ozhendekci, “Effects of the frame geometry on the weight and inelastic behavior of eccentrically braced chevron steel frames,†J. Constr. Steel Res., 64: 326–43, 2008.

G. S. Prinz and P. W. Richards, “Eccentrically braced frame links with reduced web sections,†J. Constr. Steel Res, 65: 1971-1978, 2009.

P. W. Richards and C. M. Uang, “Effect of flange width-thickness ratio on eccentrically braced frames link cyclic rotation capacity,†J. Struct. Eng., 131:1546-1552, 2005.

P. W. Richards and C. M. Uang, “Testing protocol for short link in eccentrically braced frames,†J. Struct. Eng., 132: 1183-1191, 2006.

J. W. Berman, T. Okazaki, and H. O. Hauksdottir, “Reduced link sections for improving the ductility of eccentrically braced frame link-to-column connections,†J. Struct. Eng., 136(5): 543-553, 2010.

A. Mohebkhah and B. Chegeni, “Over-strength and rotation capacity for EBF links made of European IPE section,†Thin-Walled Structures, 74: 255-260, 2014.

T. Okazaki, M. D. Engelhardt, J. K. Hong, C. M. Uang and A. Drolias,†Improved Link-to-Column Connections for Steel Eccentrically Braced Frames,†J. of Struct. Eng., 2014.

Yurisman, B. Budiono, M. Mustopo, and M. Suarjana, “Behavior of shear link of WF section with diagonal web stiffeners braced frame (EBF) of steel structure,†ITB Journal of Engineering Science, 42, No. 2, 2010

T. Okazaki, G. Arce, H. C. Ryu, and M. D. Engelhardt, “Experimental study of local buckling, over-strength, and fracture of links in eccentrically braced frames,†J. of Struct. Eng., 131 (10): 1526-1535, 2005.

F. Danesh and B. Shakerpoor, “Behavior of braced moment frame with the modified link,†15Th WCEE, Lisboa, 2012.

T. Okazaki, “Seismic performance of link-to-column connection in steel EBF,â€Ph.D. Dissertation, The University of Texas at Austin, USA, 2004.

T. Okazaki, M. D. Engelhardt, Drolias, A., Shell, E., Hong, J. K. and Uang, C. M., “Experimental investigation of link-to-column connections in eccentrically braced frames,†J. Constr. Steel Res., 65: 1401-1412, 2009.

T. Okazaki and M. D Engelhardt, “Cyclic loading behavior of links constructed of ASTM A992 steelâ€, J. Constr. Steel Res., 63: 751-765, 2007.

M. Naghipour, N. Javadi and A. Naghipour, “Investigation of RBS connection ductility in eccentrically braced frame,†in Proc. Eng, 14: 743-752, 2011.

J. K. Hong, C. M. Uang, T. Okazaki and M. D. Engelhardt, “Link-to-column connection with supplemental web doublers in eccentrically braced frames,†J. of Struct. Eng, 2014.

M. Stephens and P. Dusicka, “Analytical and numerical evaluation of continuously stiffened composite web shear links,†J. of Struct. Eng., 2014.

T. Okazaki, T, and M. D., Engelhardt, “Finite element simulation of link-to-column connections in steel eccentrically braced frame,†in Proceedings of the 8th U.S. National Conference on Earthquake Engineering, 1526, 2006.

M.T. Nikoukalam, K.M. Dolatshahi, “Development of structural shear fuse in moment resisting frames,†J. of constr. steel research, 114, 349-361, 2015.

P. Dusicka, A. M. Itani and I. G. Buckle, “Cyclic behavior of shear links of various grades of plate steel,†J. Struct. Eng., 136 (4): 370-378, 2010.

G. D. Corte, M. D’Aniello, and R. Landolfo, “Analytical and numerical study of plastic over-strength of shear links,†J. Constr. Steel Res., 82: 19-32, 2013.

M. Stephens and P. Dusicka, “Continuously stiffened composite web shear links: tests and numerical model validation,†J. of Struct. Eng., 2014.

C. C. McDaniel, C. M. Uang, F. Seible, “Cyclic testing of built-up steel shear links for the new bay bridge,†J. Struct. Eng., 129 (6): 801–809, 2003.

Seismic Provision for Structural Steel Building, ANSI/AISC, 341-10, 2010.



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