Ultimate Strength Design of Tubular Joints

by J. Blair Reber, Jr., (A.M.ASCE), Staff Engr.; Exxon Co., U.S.A., Houston, TX,

Serial Information: Journal of the Structural Division, 1973, Vol. 99, Issue 6, Pg. 1223-1240

Document Type: Journal Paper


A method is presented for designing thick-walled, nongusseted tabular joints for static loads. The method is applicable to T-, Y-, and K-joints having branch-to-chord diameter ratios of from 0.25 to 0.75. Given the axial load in a branch, the designer can use this method to choose a chord wall thickness which satisfies static strength requirements. Conversely, given the chord wall thickness, the designer can predict the axial load in the branch which would cause the chord to fail. Comparisons are presented between predicted ultimate loads and measured ultimate loads.

Subject Headings: Axial loads | Ultimate loads | Walls | Structural strength | Ultimate strength | Joints | Load and resistance factor design | Thickness

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