Steel plate girder diaphragm and cross-bracing loads : [summary].
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2014-05-01
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Abstract:Steel bridge designs are integrated so that every
component contributes to structural integrity,
including the concrete bridge deck, which
connects to the girders and makes the structure
rigid. Until the deck is completed and the
concrete is hardened, the structure is vulnerable
to collapse and must be stabilized with cross-frames or diaphragms. Many methods are available
for designing cross-frames; however, their
prediction of cross-frame forces may not agree,
leading to different designs.
In this project, Florida International University
researchers developed procedures, instructions,
and recommendations intended to lead to more
uniform design of cross-frames. To facilitate
using these methods, the researchers limited
their efforts to two-dimensional methods of
analysis. They considered I-girder bridges of three
types: straight; straight with skew supports; and
horizontally curved.
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