01365768

Component

The paper presents more details about a novel strengthening technique for thin-walled steel structures. Strengthening-By-Stiffening (SBS) was proven to be a viable technique for inhibiting local buckling in shear-controlled steel beams. SBS relies on the out-of-plane stiffness of pultruded composite sections as opposed to the in-plane strength of thin composites that is often reported in the literature. Relying on the in-plane properties of composites to strengthen steel structures often leads to the need for large amounts of composites because the inherent superior steel properties when compared to concrete. The results from an analytical investigation show that the efficiency of SBS is affected by the slenderness of the strengthened plate. The increase in shear capacity caused by attachment of a pultruded FRP section to a deficient I-beam web ranged from 6.7% for the 5/16”-thick web to 44.7% for the 1/8”-thick web. The applicability of SBS for strengthening full scale steel girders is also investigated. Based on the findings, conclusions are drawn and recommendations for future research are made.

This paper was sponsored by TRB committee AFF80 Structural Fiber Reinforced Polymers

01362476

12-3325

English

14p

2012

Transportation Research Board 91st Annual Meeting

Digital/other

Figures; References; Tables

Buckling; Fiber reinforced polymers; Steel structures; Stiffeners (Plates); Structural strengthening; Thin walls

Bridges and other structures; Highways; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls; I34: Steels and Metals; I61: Equipment and Maintenance Methods

Transportation Research Board Annual Meeting 2012 Paper #12-3325

TRIS, TRB

Feb 8 2012 5:15PM