Effective Width of Girder Web Containing Prestressing Duct

by T. Ivan Campbell, Assoc. Prof.; Dept. of Civ. Engrg., Ellis Hall, Queen's Univ., Kingston, Ontario K7L 3N6 Canada,
Barrington deV. Batchelor, (M.ASCE), Prof.; Dept. of Civ. Engrg., Ellis Hall, Queen's Univ., Kingston, Ontario K7L 3N6 Canada,


Serial Information: Journal of the Structural Division, 1981, Vol. 107, Issue 5, Pg. 733-744


Document Type: Journal Paper

Abstract: The effective web width to be used in the shear design of a thin-webbed concrete beam, containing longitudinal prestressing ducts in the web, is examined. Various expressions proposed for the effective web width are reviewed and compared with data from plain concrete prisms loaded in axial compression and from tests on beams which failed in the web crushing mode and which contained a duct in the web. Prism tests do not accurately simulate the behavior of the web in diagonal compression. An effective web width based on data from beam tests is proposed, and a chart for use in computing the shear strength based on web crushing is included.

Subject Headings: Web beams | Webs (structure) | Internet | Effective width | Concrete beams | Duct | Compression tests | Prestressing

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