Patent Application
20090277123
The present finding regards a connector for the connection between a metal element and an element made of concrete.
A typical case of use of this kind of connection is the one between a steel beam and a concrete slab. The connector mainly exercises a resistance against the horizontal movement between the underlying beam and the slab. Furthermore, the connector is shaped in such a manner to resist against vertical detachment forces between the beam and the slab.
As known in the building industry there often arises the problem regarding proper connection of steel beams with a concrete slab. The steel beams are referred to as primary or secondary depending on their importance from a static point of view in the building industry. The structure of the transverse section of these beams can be extremely varied and, strictly for exemplification purpose, only IPE or HE beams are mentioned hereinafter. On the upper part, the beams are covered with a layer of concrete and thus there is the possibility of providing for reciprocal fastening between the beam and the concrete itself.
As a matter of fact, in cases where the performance of these kind of connections are not provided for, the beams would require to be made with much greater dimensions, hence implying higher costs for manufacturing structures comprising the beams themselves. In practice, it is possible to ensure the connection between the steel and concrete material and considerably reduce the amount of steel used at the same time, consequently leading to advantages in terms of reducing both the manufacturing costs and the overall dimensions of the structure.
At times, provided on the upper part of the beams, are metal sheets, of the so called trapezoidal corrugated type, given that they have alternating furrows and reliefs; in particular, it is provided for that the concrete be applied over the sheets, which thus end up interposed between the concrete and the beams. Thus, when using trapezoidal corrugated sheets, reciprocal fastening between the underlying steel beam and the concrete slab through the trapezoidal corrugated sheet is required.
In order to allow these connections many types of connectors have been invented and among which the one described in the EP-A-0504500 document, of the same applicant, which regards a connector-pin provided with a fastening plate and studs or any other fastening material.
The objective of the present invention is to provide for a connector of the type described above, easier to mount and also more resistant once mounted, with respect to similar connectors of the known type.
According to the invention, this is attained by providing a connector having a substantially rectangular base, fastenable against a beam or against a sheet interposed between the plate and the concrete through at least one fixed connection element, represented, for example, in particular by a stud, being provided for that from such base there rises two substantially flat shaped side edges, arranged slanting with respect to the abovementioned base.
Said connector is capable of adapting both to the presence of straight or U-shaped bars, for reinforcing the connection with the concrete, which will be arranged in proximity to the upper ends of said side edges, and also to the presence of possible ribs (usually referred to as bosses) at the bottom of the trapezoidal corrugated sheets.
These and other characteristics of the finding shall be described in details hereinafter, with reference to some of its particular embodiments, provided for exemplification purposes, with the aid of the attached drawings wherein:
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