LRFD software for design and actual ultimate capacity of confined rectangular columns : [technical summary].
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2013-04-01
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures;NTL-HIGHWAY/ROAD TRANSPORTATION-Design;
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Abstract:Columns are considered the most critical elements in structures. The unconfined analysis for columns is well established in the literature. Structural design codes dictate reduction factors for safety. It wasn’t until very recently that design specifications and codes of practice, like AASHTO LRFD, started realizing the importance of introducing extreme event load cases that necessitates accounting for advanced behavioral aspects like confinement. Confinement adds another dimension to columns analysis as it increases the column’s capacity and ductility. Accordingly, confinement needs special non linear analysis to yield accurate predictions. Nevertheless the literature is still lacking specialized analysis tools that take into account confinement despite the availability of all kinds of confinement models. In addition the literature has focused on axially loaded members with less attention to eccentric loading. Although the latter is more likely to occur, at least with misalignment tolerances, the eccentricity effect is not considered in any confinement model available in the literature.
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