Bridges – Truss – Arrangement
Patent
1979-11-16
1981-08-11
Byers, Jr., Nile C.
Bridges
Truss
Arrangement
52648, 52693, 14 17, 14 73, E01D 900, E04C 302
Patent
active
042826195
ABSTRACT:
A low cost, factory fabricated, force distributing bridge truss assembly is disclosed which includes respective, interconnected, converging pairs of carrier truss structures designed to be composited to an overlying concrete bridge deck such that the latter serves as a top chord diaphragm for absorbing live load-induced compression and bending forces. The carrier truss structures are fabricated using only two standard shapes of plasma arc cut steel angles (normally 6".times.6" for truss webs and 8".times.8" for truss chords) welded directly together without the need for special order steel or supplemental gusset plates. The preferred deck for use with the truss assembly hereof is a concrete structure having a lowermost, spanning metallic plate substrate composited (by means of upstanding studs) to a concrete layer thereon. This assembly may be applied to the carrier truss structure in either precast, sectionalized form or field cast in place. The upper chord elements of the respective carrier trusses are simply welded to the planar underlying substrate at the panel points to develop the final mechanical composite. Completed bridges using the carrier truss assemblies of the invention are characterized by very low depth-to-span and dead load/live load ratios, minimal deflections, and high degrees of structural redundancy rendering the bridges extremely stable; moreover they are protected against critical collapse and are highly suited for performance in situations where long term fatigue causing stress reversals are a problem.
REFERENCES:
patent: 33629 (1861-11-01), Avery
patent: 1153099 (1915-09-01), Moore
patent: 2860743 (1958-11-01), Cliff
patent: 3103025 (1963-09-01), Gassner
patent: 3181187 (1965-05-01), Kahn
patent: 3906571 (1975-09-01), Zetlin
patent: 4129917 (1978-12-01), Sivachenko
patent: 4178736 (1979-12-01), Salas
Byers Jr. Nile C.
Havens Steel Company
LandOfFree
Truss structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Truss structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Truss structure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1019969