RU115796U1 - WOOD AND FOAM CONCRETE overlapping - Google Patents

Abstract

Timber-concrete slab, including load-bearing wooden beams (walls), foam concrete reinforced slab (shelf), the lower plane of which is located at the level of the upper edges of the beams, connecting the beam and the slab with steel anchors installed at a certain pitch, to create adhesion and ensure joint operation of the foam concrete shelf and a wooden beam, characterized in that the concrete slab (shelf) is made of lightweight non-autoclaved aerated concrete.

Description

The utility model relates to the field of construction, namely, to constructions of bent wood concrete elements used as load-bearing elements of floors or coatings of buildings.

A wood-concrete bridge span is known, including a wooden beam connected to each other and a monolithic reinforced concrete slab using glued rods of the corrugated profile embedded in the beam and the stops fixed to them monolithic in the body of the plate [see Application for utility model 99112716/20 of 06/10/1999].

A disadvantage of the known design consists in the large dead weight of the concrete shelf (which reduces the value of the payload) and in the use of special glued rods of the corrugated profile embedded in the beam (the manufacture, installation and gluing of which requires special devices).

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

A disadvantage of the known construction is the large dead weight of the concrete shelf (significantly reducing the value of the payload) and the incomplete use of the strength properties of section materials (destruction occurs along a wooden edge).

The utility model is aimed at reducing the self-weight of the overlap, at bringing the stress-strain state of the structure closer to the plastic fracture scheme (in which the shelf and rib collapse simultaneously, in contrast to the brittle fracture of wood-concrete elements), at increasing the uniformity of the materials of the rib (beam) and plate.

The result is achieved by the fact that the heavy concrete of the shelf is replaced by light (non-autoclaved foam concrete), this significantly reduces (by 3 ... 4 times) its own weight. The density of foam concrete is approximately equal to the density of wood (600-900 kg / m ³ ), which increases the homogeneity of the cross-sectional materials. Steel anchors are installed with a certain step for a more rigid connection between the materials of the shelf and the wall. A mesh of wire reinforcement is installed to reduce the shrinkage of non-autoclaved foam concrete and achieve the required strength of the plate in the transverse direction.

The device of wood-concrete flooring should be performed in the following order:

B. the wooden beam with a certain step nails are hammered, serving as binding anchors. A wooden beam with anchors is installed in the design position. Between the beams, a wooden plywood formwork is arranged, the upper plane of which is at the level of the upper faces of the beams. The formwork is attached to the side faces of the beams. A reinforcing mesh of wire of a certain diameter with a certain pitch of the rods is installed. Foam concrete of strength class B 2.5 - B 5 with a density of D600 - D900 to the design mark is laid (poured) into the formwork.

The assembled wood-concrete flooring from a similar wooden flooring is characterized by increased strength, rigidity and overall bearing capacity; and unlike a similar timber-reinforced concrete beam, it has a significantly lower dead weight (3 ... 4 times), increased sound and heat insulation (for coatings and attic floors).

Figure 1 shows the structural arrangement of the constituent elements of a wood-concrete floor in a perspective view.

Figure 2 shows the structural arrangement of the constituent elements of a wood-concrete floor in cross section.

Figure 3 shows the structural arrangement of the constituent elements of a wood-concrete floor in a longitudinal section.

Wood-concrete flooring includes:

1. Wooden beam (wall)

2. Foam concrete slab (shelf)

3. Anchors fixed in a wooden beam

4. Reinforcing mesh

Claims (1)

A wood-concrete floor, including load-bearing wooden beams (walls), a reinforced concrete foam slab (shelf), 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, to create adhesion and ensure the collaboration of the foam concrete shelf and wooden beams, characterized in that the concrete slab (shelf) is made of light non-autoclaved cellular foam concrete.