Tests on Beams with Reinforced Web Openings

by Peter B. Cooper, Assoc. Prof. of Civ. Engrg.; Kansas State Univ., Manhattan, KS,
Robert R. Snell, Prof. of Civ. Engrg.; Kansas State Univ., Manhattan, KS,

Serial Information: Journal of the Structural Division, 1972, Vol. 98, Issue 3, Pg. 611-632

Document Type: Journal Paper


Sixteen elastic tests and three ultimate load tests on A36 steel W 12x45 beams with reinforced rectangular openings in the web at middepth are described and analyzed. The experimental variables were the moment-shear ratio at the opening and the details of the horizontal reinforcing bars which were used above and below the openings. It is concluded that fillet welds placed on only one side of the reinforcing bars provided an adequate connection to the web, both for one and two-sided reinforcing bars, and that the use of reinforcing bars on only one side of the web had no interpretable effect on the strength and behavior of the beams. It is also concluded that designing the extension of the reinforcing bars beyond the edges of the opening to develop the strength of the bars in the welds is a reasonable and satisfactory approach to this detail.

Subject Headings: Bars (structure) | Web beams | Load tests | Webs (structure) | Elastic analysis | Steel beams | Structural strength | Ultimate loads

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