Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1988-10-25
1990-07-03
Scherbel, David A.
Hydraulic and earth engineering
Foundation
Columnar structure
405251, 405231, 403337, 52722, 52726, E02D 514
Patent
active
049386352
DESCRIPTION:
BRIEF SUMMARY
This invention relates to beams of concrete or equivalent material for use in creating multi-beam assemblies to be used as piles in the ground by the beams being driven uprightly thereinto, or as columns and horizontals in the erection of a superstructure for a building with or without using a substructure of piles formed of conventional beams or of beams of the present invention. The invention also relates to connecting means for joining said beams.
Such conventional beams are normally of rectangular cross-section and are formed of concrete cast around a cagework having two metal end pieces, one each at an opposite end of a cage of rectangular crosssection formed of four longitudinals, one at each corner of the rectangle, and having a lengthwise spaced series of hoops secured therearound.
There is continuing research and development into the construction of such beams and in particular to the connecting means or joint between two beams to improve the ultimate flexure capacity of a moment joint therebetween, and this invention is primarily concerned with connecting means between two beams.
Hereinafter in specification and claims, the term "concrete" issued to include any equivalent material which can be cast around a cagework when fluent and thereafter solidifying on curing.
In accordance with one aspect of the present invention, there is provided a beam of concrete having similar end pieces at each opposite end and an internal reinforcing elongate cage, each end piece comprising a rectangular plate transverse of the beam's longitudinal axis and apertured with wall surrounds outstanding from the inner face thereof, one from around each aperture to partition off each aperture on the plate, at least one starter reinforcing bar being secured to each surround to extend elongate with the beam's axis, said starter bars overlapping with longitudinals of said cage with concrete being cast around said cage and over the outer ends of said wall surrounds and into the void defined among the wall surrounds and each plate.
In accordance with a second aspect of the present invention, there is provided a multi-beam assembly formed from a series of beams in end-to-end relationship with connecting means securing one to the other, each beam being of concrete and having similar end pieces at each end and an internal reinforcing elongate cage, each end piece comprising a rectangular plate transverse of the beam's longitudinal axis and apertured with wall surrounds outstanding from the inner face thereof and from around each said corner to partition off each aperture on the plate, at least one starter reinforcing bar being secured to each surround to extend elongate with the beam's axis, said starter bars overlapping with the longitudinals of said cage with concrete being cast around said cage and over the outer ends of said wall surrounds and into the void defined among the wall surrounds and each plate, the connecting means comprising said apertured plates and bolt and nut fastenings, one through each of the aligned holes of abutting plates of beams in said assembly.
Preferably, the wall surrounds are similar and angular. The cage and end pieces are of metal or equivalent material. Two starter bars for each surround are preferably provided, one welded to each limb of the surround adjacent to the corner thereof on the side remote from the corresponding aperture and spaced from each other a distance to accomadate therebetween a respective longitudinal of the cage.
Alternatively, one starter is welded at the apex of the surround on the same side as the corresponding aperture.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, in which:
FIG. 1 is a side elevation showing a detail of a joint between two beams in a multi-beam assembly according to the present invention; and
FIG. 2 is a cross-sectional view on the line II--II of FIG. 1.
Referring to the drawings, a beam is of concrete and of rectangular, normally square, cross-section. The concre
REFERENCES:
patent: 2086009 (1937-07-01), Walker
patent: 3961491 (1976-06-01), Reddaway et al.
patent: 4009550 (1977-03-01), Young
patent: 4050211 (1977-09-01), Wahman
patent: 4074500 (1978-02-01), Bisutti
patent: 4196557 (1980-04-01), Silvander
Mai Lan
Scherbel David A.
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