Static structures (e.g. – buildings) – Intersection of a cast stonelike component – Cast reinforced vertical and horizontal members
Patent
1997-12-17
2000-05-09
Kent, Christopher T.
Static structures (e.g., buildings)
Intersection of a cast stonelike component
Cast reinforced vertical and horizontal members
52259, 522368, 522369, 522854, 403269, 403265, 403267, E04B 119
Patent
active
060586699
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
The invention relates to a joint of concrete building elements comprising, in the area of contact of concrete elements, shearing supporting parts for transfer of shearing forces.
STATE OF THE ART
When placing a horizontal ceiling structure onto point or linear supports, particularly supporting columns or supporting walls of a building structure, it is above all necessary to ensure a reliable transfer of shearing forces from a horizontal supporting structure into a vertical supporting structure of the column. The most popular resolution of this problem are beam ceiling structures, at which loads from a ceiling slab are transferred into ceilings beams or girders which have a sufficient cross sectional area to transfer shearing forces and which are, in addition, supported by an appropriate arrangement of shearing reinforcement in the form of bents of reinforcing bars and which are then mounted onto vertical supporting columns, in particular, by mounting ceiling beams directly onto heads of sectioned columns, brackets joined to heads of columns or into recesses formed in supporting columns. The disadvantages of such beam ceiling structures are well known and are due to the tall constructional height of the ceiling structure which diminishes the useful height of a building structure storey and causes further problems related to technological distribution and similar systems.
The disadvantage of the tall structural height of beam ceiling structures may be obviated by means of a flat-slab ceiling construction, where a ceiling slab is mounted on pyramid or truncated-conical shaped ceiling heads, the smaller base of which is connected to supporting columns heads and the bigger base of which forms a supporting surface for the ceiling slab mounting or part of the ceiling slab itself.
The Czech patent 144 928 has introduced a monolithic reinforced concrete ceiling, consisting of a monolithic reinforced concrete slab mounted on prefabricated column heads formed by truncated-conical or flat cylindrical heads the thickness of which basically corresponds with the thickness of the ceiling slab. The central part of the heads are joined to supporting columns heads and to increase their shearing bearing power, they are pre-stressed by means of a constructional arrangement whereby a circumferential cylindrical surface of heads is provided with a circumferential semi-groove in which a wrapped circumferential pre-stressed reinforcement is mounted, and under which radial bars which are fixed by wrapping are mounted to transfer shearing stresses.
A further improvement of this answer to a girderless ceiling structure consists of a monolithic ceiling slab around the ceiling head which is reinforced with a spiral reinforcement and which should ensure a perfect joint of the monolithic ceiling slab and of a prefabricated ceiling prestressed head, as well as transfer of shearing forces into the ceiling head. A disadvantage this solution is due to the complicated production process of pre-stressed ceiling heads, making them expensive and thus increasing the costs of ceiling structures.
Therefore, the invention aims to provide an answer to joining reinforced concrete structures and elements, particularly a horizontal ceiling structure, with vertical supporting elements where the transfer of shearing forces between both joined building elements and structures would be ensured by simple jointing means which are neither complicated nor expensive.
BACKGROUND OF THE INVENTION
This task has been resolved by a joint of concrete building elements according to the invention, the principle of which consists in the fact that shearing supporting parts constitute a brush system of connecting pins, formed by several rows of mutually parallel bars; their central part crosses the area of contact of joined building elements and both end sections are concreted in the mutually joined building elements.
In an advantageous embodiment of the joint according to the invention, the radial connecting pins in a brush system are arranged in a
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Argay Ivan
Halik Vojtech
Kent Christopher T.
Sicon, s.r.o.
Tran Phi Dieu
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