Effect of Beam Length and Braced Length on Moment-Rotation Behavior of Castellated Beams
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Date
2013-09
Journal Title
Journal ISSN
Volume Title
Publisher
Scientific Research
Abstract
The presence of web openings in castellated beams introduces different modes of failure at the perforated sections such
as excessive stresses in tee-sections, excessive stresses in mid-depth of the web post, web-post buckling, developing
plastic Vierendeel mechanism. This paper presents nonlinear behavior of castellated beams under moment gradient
loading and investigates the effect of beam length and braced length on moment-rotation behavior and ductility of this
type of beams. Accuracy of finite element models of plain-webbed beams is evaluated comparing moment-rotation behavior
and failure mode of other researchers’ numerical models and cleared a satisfactory accuracy. Rotational capacity
of castellated beams, derived from numerical modeling, is compared with corresponding I-shaped plain-webbed steel
beams and it is cleared that for the short beams, web openings reduce energy absorbance and plastic moment capacity
of the beams more than long ones.
Description
Keywords
Castellated Beam, Finite Element Method, Rotational Capacity, Braced Length, Monotonic Loading, Numerical Modeling, Moment-Rotation Behavior
Citation
Open Journal of Safety Science and Technology, 2013, 3, 43-50