STUDY OF OFFSHORE STRUCTURAL MEMBERS AND FRAMES
Abstract
In PART I, the ultimate strength study of large fabricated cylindrical tubular beam-columns subjected to external hydrostatic pressure is presented. Parametric studies are made using a computer code developed based on Newmark's numerical method and tangent stiffness approach. The studies consider the effect of beam-column dimensions and materials, such as slenderness ratios and diameter-thickness ratios, external hydrostatic pressure and imperfections of column such as out-of-roundness, out-of-straightness and residual stresses due to fabrication. As a result, column strength curves and beam-column interaction equations are proposed for practical use. In PART II, post-buckling, post-maximum and cyclic behavior of beam-columns and frames are studied using a computer code based on a proposed beam-column segment model, generalized cyclic stress-strain relationships and an automatic load control technique. Numerical examples of structural members and simple frames are made using the computer model developed in this study. The results are compared with available experimental data as well as the results of simple rigid-plastic analyses to verify the proposed methods.
Degree
Ph.D.
Subject Area
Civil engineering
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