RU196498U1 - Wooden frame floor slab - Google Patents

Abstract

The utility model relates to construction and can be used in load-bearing structures of the overlapping of civil buildings. The purpose of the utility model is to ensure the joint work of elements with different stiffnesses: cement-sand screed and frame wooden floor slab, by introducing the MPP to the interface of elements with different stiffnesses. is achieved by the fact that the MZP, attached to a wooden floor slab, after the cement-sand mortar has hardened, begin to perceive tangential stresses between the cement eschanoy screed and wooden floor slab, thereby preventing the shift elements relative to each other, thereby enabling the joint work of the wooden slabs and cement screed.

Description

The utility model relates to construction and can be used in load-bearing structures of the overlap of civil buildings.

A constructive solution is known for a wood-concrete slab containing an upper concrete part and a lower part in the form of a wood slab consisting of boards of different heights mounted on a rib in a checkerboard pattern, double-sided discontinuous slots are provided in checkered wood slabs on the lateral protruding faces, arranged along the length in a checkerboard pattern [Dmitriev P.A., Zhadanov V.I. Concrete slab. Patent No. 2215854. Published November 10, 2003, Bull. No. 31].

The disadvantage of this solution is the increased complexity of the sample nests.

Another well-known constructive solution is a wood-concrete building element, including a wooden wall and a reinforced concrete shelf, combined by shear-receiving connecting elements, which are used as loop anchors or anchors with an H-shaped outline from periodic reinforcement glued into the wood at an angle of 30-45 degrees to the direction fibers of a wooden element on epoxy resin ED-20 or composition EPTs-1 [Filimonov MA, Turkovsky SB Wood concrete building element. Utility Model Patent No. 107539. Posted on 08/20/2011, Bull. No. 232].

The disadvantage of this solution is the increased complexity of ensuring the position of the shear-receiving coupling elements at an angle of 30-45 degrees to the direction of the fibers of the wooden element.

A constructive solution of a wood-concrete bridge span is also known, including a wooden beam connected to each other and a monolithic or prefabricated plate using glued rods embedded in the beam and fixed stops monolithic in the plate body, characterized in that the glued rods are located at least in two rows along the beam vertically and / or obliquely with a variable pitch depending on the magnitude of the shear stress; the immersion depth of glued rods in a wooden beam is different and is determined by the ratio of the shear stress acting in the cross section to the permissible norm [Reshetnikov IV, Salamakhin PM Concrete span bridge. Utility Model Patent No. 119351 Posted on 08/20/2012, Bull. No. 23].

However, such a constructive solution has a drawback, namely, when constructing a wood-concrete span, it is necessary to re-determine the pitch and immersion depth of glued rods, which excludes the possibility of using such a solution as a standard one.

Another well-known constructive solution is a composite wood-concrete beam containing a glued plank wall, combined along the upper face with a reinforced concrete slab using shear-receiving elements, a polymer concrete layer and arc-shaped dowels, rigidly connected to the glued plank wall; arcuate dowels are fixed in blind grooves of an arcuate shape, placed discretely along the upper edge of the glued wall [Nakashidze BV, Kalugin PI, Shatskikh MA Composite wood-concrete beam. Patent No. 2172371. Posted on 08/20/2001, Bull. No. 23].

The disadvantage of this solution is the increased complexity of the assembly of a composite wood-concrete beam.

Closest to the proposed solution is a composite wood-concrete beam, including a wall made of wood and a reinforced concrete slab, combined with a wall in the upper face by means of shear-receiving devices from bar reinforcement placed at one end in blind grooves that are formed along the upper face of the wall and anchored with an adhesive polymer-concrete composition, and the other ends are anchored in a reinforced concrete slab; each blind groove has arcuate and inclined sections to the longitudinal axis of the wall, and shear-receiving devices are made in the form of inclined arcuate elements with curved end sections exposed in pairs in the blind grooves of the wooden wall or in the form of closed loop elements; at the same time, starting from the end of the wooden beam to its middle part at a distance of 0.15 to 0.3 of the span to be covered, additional anchor devices for shear-receiving elements in the form of rod pins passed through across the blind oblique grooves of the wall and shear-receiving elements were installed [B. Nakashidze V., Berezin P.B. Composite wood-concrete beam. Patent No. 2322545. Posted on 04/20/2008, Bull. No. 11].

The disadvantage of this solution is the increased complexity of the assembly of a composite wood-concrete beam.

The problem solved by the claimed solution is to ensure the reliability of the building floor structure with a combination of emerging operational loads, due to the joint work of a wooden floor slab and load-bearing elements of the floor structure.

The essence of the utility model is to fasten the flooring to the surface of the wooden floor, which will provide sufficient rigidity of the wooden flooring and the supporting structural elements of the floor due to the perception of the shear (shear) stresses between the wooden flooring and the cement-sand floor screed.

The technical result obtained by using the utility model is to ensure the reliability of the wooden floor slab and load-bearing elements of the floor structure by imparting the necessary rigidity when combining them into a single structure.

The problem is solved due to the fact that the MZP perceives tangential stresses at the interface between the wooden floor slab and the load-bearing elements of the floor structure, which provides the ability to redistribute internal stresses in the floor elements with different physical and mechanical characteristics.

The essence of the utility model is illustrated by the drawing, where in FIG. 1 shows a general view of a floor slab with a wooden frame; in FIG. 2 shows a section 1-1 in FIG. 1; in FIG. 3 shows the assembly 1 in FIG. 1.

The floor slab with a wooden frame consists of a wood-laminated chipboard 1, on which glued I-beams 2 are installed, on which a gypsum chip 3 is installed, to which metal-toothed plates 4 are staggered with screws 6, the floor structure is made in the form of cement sand screed 5.

A floor slab with a wooden frame is assembled as follows.

A wooden floor is assembled from chipboard 1, glued I-beams 2 and gypsum particle board 3. Then to the gypsum particle board 3 they are attached with screws 6 in a checkerboard pattern МЗП 4. Install the floor in the design position. Pour cement-sand screed 5.

The structure perceives the load and, as a result, begins to deform. At the boundary of elements with different stiffness characteristics: cement-sand screed 5 and gypsum chip 3, tangential stresses arise, as a result of which the elements shift relative to each other. MZP 4 perceive these tangential stresses and prevent the shear of materials, thus, the joint work of cement-sand screed 5 and gypsum chip 3.

Claims (1)

A slab with a wooden frame, including a wood-laminated slab, an glued I-beam and a gypsum particle board, combined with load-bearing structural elements of the floor with a cement-sand screed, characterized in that the gypsum board is evenly spaced with metal-toothed plates to impart a calculated stiffness to the floor, evenly on its surface, and the gear plates are rigidly attached to the plate.

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