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doi:10.3850/978-981-08-7920-4_S2-S32-cd
Strengthening Steel Structures using Composites: A New Approach for Inhibiting Local Buckling
A. M. Okeil1, Y. Bingol2, M. R. Ferdous3, G. Broussard4 and M. Chorkey5
1Department of Civil and Environment Engineering, Louisiana State University,
Baton Rouge, Louisiana, USA.
2Foster Wheeler USA Corp., Houston, Texas, USA.
3Texas Transportation Institute, College Station, Texas, USA.
4Fox-Nesbit Engineering, LLC, Baton Rouge, Louisiana, USA
5ABMB Engineers Inc., Baton Rouge, Louisiana, USA.
ABSTRACT
The use of composite materials to strengthen concrete structures is well established to the
extent that design guidelines and codes have already been drafted. Steel structures are also in
need for strengthening because of increasing load demands and aging infrastructure systems.
The use of composites to strengthen steel structures has been lagging compared to concrete
because the inherent superior steel properties often require large amounts of composites if the
techniques, established for concrete are followed. In this paper, a new technique referred to as
Strengthening-By-Stiffening (SBS) that relies on the out-of-plane stiffness of pultruded composite
sections is utilized to inhibit local buckling in steel structures as opposed to the in-plane
strength that is often reported in the literature. Results from experimental tests are presented.
The results show that the technique is successful in enhancing the buckling load of a shearcontrolled
beam by 56%. Based on the findings, conclusions are drawn and recommendations
for future research are made.
Keywords: Buckling, Composites, Steel girders, Shear, Thin-walled.
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