Analysis of Unstiffened and Stiffened Tubular Members Under External Pressure and Structural Loads

by Spyros A. Karamanos, (A.M.ASCE), Univ of Texas, Austin, United States,
John L. Tassoulas, (M.ASCE), Univ of Texas, Austin, United States,

Document Type: Proceeding Paper

Part of: Structures Congress XII


This paper summarizes some important results concerning the ultimate capacity of stiffened and unstiffened tubes under combined loading. Such tubes are candidates for use in offshore structures and, therefore, they must be designed against simultaneous actions of axial load, bending and external pressure. A rigorous nonlinear finite element technique is developed for the prediction of the ultimate capacity of these members. The analytical results are compared with experimental data, as well as with design equations, and are of immediate significance for the safe design of offshore structures.

Subject Headings: Axial loads | Structural safety | Offshore structures | Structural analysis | Tubes (structure) | Structural design | Stiffening

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