FI77716C - Concrete elements such as beam, slab or the like with reinforcement. - Google Patents

Description

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CONCRETE ELEMENT, SUCH AS BEAM, SLAB OR SIMILAR, REINFORCED - BETONGELEMENT, SASOM BALK, PLATTA ELLER DYLIKT FÖRSEDD MED ARMERING

The invention relates to a concrete element, such as a beam, a slab or the like, which is provided with parallel wires in different levels in the concrete element and with wire brackets connecting them, the so-called from a lattice beam, formed by reinforcement, which lattice beam is in the shape of an isosceles triangle in cross section.

Beams or similar concrete elements often need to be reinforced in order for these to receive the stresses that occur.

Thus, it is known from Swedish patent 354683 to reinforce concrete slabs with different truss beams in order to receive the stresses in use, in particular shear stresses. CH patents 471,295 and 506,674 also disclose the reinforcement of concrete elements by means of truss beams.

The object of the invention is now to improve such a concrete element, which needs to be reinforced in particular, so that it can better receive the shear stresses occurring in use.

This object is achieved by a concrete element having the features of the following claims.

The invention will be described in more detail with reference to the exemplary embodiments shown in the accompanying drawings, in which case other characteristic features of the invention are also given.

Figure 1 shows a side view of a reinforced concrete beam according to the invention.

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Figure 1a shows an end view of the bar in Figure 1.

Figure 2 shows a side view of the reinforcement element of a concrete element. Figure 2a shows a plan view of Figure 2.

Figure 3 shows a side view of a reinforcement element according to an embodiment.

Figure 4 shows a side view of another embodiment of a reinforcement element.

Figure 5 shows an end view of an embodiment of the reinforcement elements in Figures 3 and 4.

Figure 6 shows an end view of another embodiment of the reinforcement elements in Figures 3 and 4.

Figure 6a shows a reinforced reinforcement element.

Figure 7 shows a side view of another embodiment of a reinforcement element.

Figure 7a shows an end view of the element in Figure 7.

Figure 8 shows a further embodiment of the reinforcement element. Figure 8a shows an end view of Figure 8.

The concrete beam 10 shown in Fig. 1 is reinforced with a reinforcing element consisting of a truss beam 12, inside which two additional truss beams 14 are placed, one at each end of the truss beam 12 and the concrete element 10. The truss beams 12 and 14 are of a type known per se and comprise in the illustrated embodiment two parallel wires running in the longitudinal direction of the concrete element, such as wires 16, 18 and 20 in the truss beam 12 (Fig. 1a) and connecting them. . . 3,771 6 wire brackets 22. The wire brackets 22 in this case have a zigzag shape.

The lattice beam 14 has a similar shape, which is why it will not be described in more detail; however, the truss beam 14 has a lower height so that this can be arranged inside the truss beam 12 as shown.

The beam 10 shown is subjected under load to shear stresses which are greatest at the end portions. The disclosed structure of the reinforcement element having a through reinforcement element 12 reinforced in the end portion of the reinforcement element 14 resists this load stress in an effective and simple manner as compared with previous reinforcements of this type of structural element.

The truss beams 12 and 14 may be interconnected, for example by welding, to facilitate the handling of the entire reinforcement element, but may also be arranged loose from each other.

In the embodiment of the reinforcement element shown in Fig. 2, the truss beam 14 is arranged at an angle and through the truss beam 12, in this case directly at an angle to it, which appears in Fig. 2a. This reinforcing element is preferably used for an element of concrete or similar material to form the anchoring of the corresponding reinforcing elements at a higher right angle.

As shown in Figure 3, the reinforcement element 24 may have a zigzag-shaped structure, but a one-sided inclination of the wire brackets is also possible, as shown by the element 26 in Figure 4. In both cases, i. element 24 in Fig. 3 and element 26 in Fig. 4, the element may consist of either two parallel wires and connecting wire brackets as shown by element 28 in Fig. 5 or three parallel wires and double 7771 6 4 connecting wire brackets as shown by element 30 in Fig. 6, i. same structure as element 14 in Figure 1.

The embodiment shown in Fig. 6a has a reinforcement element of the type shown in Fig. 6 reinforced with a wire-bracket 32 having a U-shape and arranged around the bottom part of the reinforcing element 30.

The embodiment shown in Figures 7 and 7a has a zigzag-shaped reinforcement element 34 and the type shown in Figures 3 and 6 reinforced by two elements 36 arranged at the ends and constructed at a higher height, for example at twice the height of the element 34.

In the embodiment shown in Figures 8 and 8a, the base element 34 is of the same type reinforced by two reinforcement elements 38 made according to Figures 4 and 6, i. with a unilateral inclination of the connecting wire brackets.

As can be seen from the above, various combinations of reinforcement elements are possible in order to provide the intended reinforcement and to increase the strength required against the shear stresses of the concrete element to be reinforced. The parts included in the reinforcement element can, as previously mentioned, possibly be joined together by welding or the like to facilitate handling before pouring into the concrete element.

The inclination of the wire brackets in the reinforcement elements, for example 22 in Fig. 1a, relative to the straight parallel wires can vary over a wide range, but is preferably between 20-60 °, while the distance between the attachment points of the wire brackets on the parallel wires is preferably between 50-200 mm.

The concrete element made according to the invention, described above, increases the ability of the concrete element to receive shear stresses and thus the ability of the beam or slab or the like to receive and withstand shear forces.

It is to be understood that the invention is not limited to the embodiments shown, but may vary within the scope of this underlying idea.

Claims (6)

1. Concrete elements such as beam, slab or the like (10) provided with a reinforcement of parallel trees (16, 18, 20) lying at different levels in the concrete element and these connecting tree brackets (22), so-called grid beam (12, 34), which beam section (12, 34) in cross section has a similar triangular shape, characterized in that for reinforcing the reinforcement along substantially the end portions of the concrete element (10), this to counteract the increased load stresses in these parts is reinforced by ρέ the inner or outer arrangements of the lattice beams (12, 34) and these connecting tree braces or single trees (30) forming an additional lattice beam (14, 24, 26, 36, 38), as well as a similar triangular cross-section, with a substantial height other than the former grid bar (12, 34). Element according to claim 1, characterized in that the additional grid beam (14, 36, 38) arranged at the grid beam (12) extends in the same longitudinal direction. 3. An element according to claim 1, characterized in that the additional grid beam (14) arranged at the grid beam (12) extends at an angle to the longitudinal direction of the grid beam (12). 4. An element according to any one of claims 1-3, characterized in that the additional grid beam (14) has a lower height than the first one and is arranged inside it. 5. Elements according to claim 1 or 2, characterized in that the additional grating beam (14) has a higher height than the first grating beam (12) and is arranged externally! this. Element according to any one of claims 1-5, characterized in that the additional grating beam (26,