Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Reexamination Certificate
2006-05-23
2006-05-23
Katcheves, Basil (Department: 3635)
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Tilts relative to base
C052S650300, C052S656900, C052S749100, C052S633000
Reexamination Certificate
active
07047695
ABSTRACT:
The present invention provides for improvement of ductility and strength performance of connections in structural steel buildings made typically with rolled structural shapes, specifically in bolted and/or welded beam-to-column connections with welded flanges, by greatly reducing the very significant uneven stress distribution found in the conventionally designed connection at the column/beam weld, through use of slots in column and/or beam webs with or without continuity plates in the area of the column between the column flanges, as well as, optionally, extended shear plate connections with additional columns of bolts for the purpose of reducing the stress concentration factor in the center of the flange welds. Moreover, the slots in beam web adjacent to the beam flanges allow the beam web and flange to buckle independently thereby eliminating the degrading of the beam strength caused by lateral-torsional bucking.
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Allen Clayton J.
Partridge James E.
Richard Ralph M.
Bryan Cave LLP
Katcheves Basil
Seismic Structural Design Associates, Inc.
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