Moment-rotation characteristics for inelastic design of steel bridge beams and girders
Abstract
This research focuses on the behavior of steel bridge girders with noncompact transversely-stiffened webs in negative moment regions over interior pier supports. The primary goal is to develop simple but comprehensive moment-rotation relationships for use in autostress based inelastic design and rating procedures. These procedures recognize a girder's ability to "automatically" redistribute moment due to local yielding over interior pier supports. Current AASHTO-LRFD autostress based inelastic design Specifications are only applicable to braced compact sections as the moment-rotation characteristics for noncompact sections have not been studied comprehensively. This study fills this knowledge gap and proposes moment-rotation relationships suitable to facilitate the extension of inelastic design and rating techniques to girders with noncompact transversely-stiffened webs. A parametric study of the key design parameters is made using refined finite element tools. In addition, the effects of key design parameters are verified experimentally.
Degree
Ph.D.
Advisors
White, Purdue University.
Subject Area
Civil engineering
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