RU177801U1 - WOODEN CONCRETE WOOD FLOORS - Google Patents

Abstract

The utility model relates to the field of low-rise construction, namely, structures used as ceilings and coatings of residential and public buildings. A useful model is aimed at increasing stiffness, strength and reducing the material consumption of both beams, slabs, and the entire floor as a whole. the ceiling includes wood-concrete board-glued beams combined with a monolithic slab of expanding concrete. According to a utility model, the load-bearing beams are made of glued wood with grooves (depressions) in the wall and with ridges in the upper zone of the wall, which improves the joint work of the wood-concrete beam with the slab. Due to the use of concrete on expanding cement and reinforcing rods in the beam, mesh reinforcement in the slab, concrete hardens, the self-tension of the floor occurs. The assembled wood-concrete slab, due to the presence of a cavity in the wall of the beam and curbs and cavities filled with expanding concrete, has increased rigidity and strength due to prestressing beams and slabs and as a result provides a reduction in the consumption of materials, as well as due to the presence of ribs and anchor rods at the upper level (at the junction with the slab) increase It provides the anchoring ability of the shear-accepting elements of the beam and slab.

Description

The utility model relates to the field of low-rise construction and can be used as floors of residential and public buildings.

A constructive solution is known for combining a reinforced concrete slab with a wooden beam by means of shear-receiving devices in the form of pins installed in pre-drilled nests in a wooden beam [see Prince Kulish V.N. Glued wooden bridges with reinforced concrete slab. M., Transport, 1979, p. 43-50].

A disadvantage of the known design is the reduced stiffness of the joint and structure.

It is known wood-reinforced concrete floor, including wooden beams, combined along the upper edge with a reinforced concrete slab using shear-sensing elements [see article: Mirsayapov I.T., Abdrakhmanov I.S. Experimental and theoretical studies of wood-reinforced concrete structures. // Bulletin of construction equipment, 1999, No. 12, p. 46-49].

The disadvantages of this design are: insufficient rigidity and strength, incomplete use of the strength properties of the materials (concrete) section, because destruction occurs along a wooden rib-beam.

The closest is a wood-concrete floor, including load-bearing wooden beams and a concrete reinforced slab, the lower plane of which is located at the level of the upper faces of the beams, steel anchors connecting the beam and the slab installed with a certain step (see RF patent No. 115796, IPC E04B 5/16, published on May 10, 2012, Bulletin No. 19).

The disadvantages of the known wood-concrete floors are relatively low stiffness and strength, due to the lack of prestressing, low tensile strength of foam concrete slabs.

The utility model is aimed at increasing the rigidity and strength of the plate, at approaching the stress-strain state of the structure to the plastic fracture scheme (in which the shelf and rib are destroyed simultaneously).

The result is achieved in that in a wood-concrete floor, including load-bearing wood-concrete beams, a monolithic slab, according to a utility model in load-bearing beams and a slab, ordinary concrete is replaced by concrete on expanding cement. The result is also achieved by the fact that for the joint work of the beam and the slab, the wooden beam is made with a deep groove filled with concrete. The result is also achieved by the fact that non-metallic plastic reinforcement is installed in the wood-concrete beam in the lower zone, and the plate is reinforced with plastic mesh reinforcement. To improve the adhesion of the concrete slab to the wood-concrete beam in the contact zone of the wall of the beam, non-metallic anchors are installed on two levels. The use of non-metallic reinforcement excludes corrosion of the reinforcement, which usually occurs with the use of expanding concrete and steel reinforcement.

In FIG. 1 shows a self-stressed reinforced monolithic slab with a concrete beam.

The ceiling includes wooden concrete beams 1, concrete slabs are supported on beams 1. Wooden bearing beams 1 of glued elements in the upper part of the wall have deep grooves filled with expanding concrete 4. In order to increase the rigidity and strength of the concrete floor, non-metallic reinforcement is installed in the depth of the grooves of the beams 4, and the slab 2, made of expandable concrete 5, is reinforced with mesh reinforcement 6. To hold the walls 7 of the beam 1 in the design position from the spread of expanding concrete 5 in the upper zone of the mouth beam ovleny screed 8. Collaboration beams 1 and the concrete plates 2 provided zarebreniyami wall 7 in the upper layer. Nonmetallic anchors 9 are installed in the hollows of the ribs, and anchor 10 is installed in the upper level.

The order of installation of the floor is as follows. First, in the design position, wooden supporting beams 1 with screeds 8 are installed, then a removable plywood formwork is mounted, the upper plane of which is at the level of the upper faces of the beams 1, the formwork is attached to the side faces of the beams. Mount non-metallic bar reinforcement 4 and reinforcing mesh 6, lay the concrete on expanding cement 5. Monolithic concrete 5, filling the troughs 3 of the beam 1, forms a plate 2 reinforced by the beams 1 (Fig. 1). When hardening expanding concrete, prestressing of reinforcement 4 beams 1 and mesh reinforcement 6 of slab 2 occurs.

Self-tensioned assembled wood-concrete flooring, due to the presence in the wall of the beams of cavities and ridges in the upper part, filling the cavities with expanding concrete, has increased rigidity and strength, as a result, it reduces material consumption. The use of such beams in ceilings reduces their material consumption, the use of expanding concrete in the slab and beams increases the bearing capacity and rigidity of the slab and floor due to the prestressing of the beam reinforcement and the grid of the slab. In addition, the presence of ribs on the beam at the upper level (at the junction with the slab) increases the anchoring ability of the shear-receiving elements of the beam and slab.

Claims (3)

1. Self-tensioning wood-concrete floor, including reinforced glued wooden beams filled with concrete, concrete reinforced slab, connecting the beam and the anchor slab, characterized in that the concrete monolithic slab and the filling of the beams are made of expanding concrete. 2. Self-stressed wood-concrete floor according to claim 1, characterized in that in the lower zone of the beam there is a non-metallic rod, and in the lower zone of the slab - non-metal mesh reinforcement. 3. Self-stressed wood-concrete floor according to claim 1, characterized in that the upper zone of the walls of the beam is ribbed, and non-metallic anchor rods are located in hollows and protrusions.

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