RU14773U1 - Spatial Prefabricated Monolithic Frame - Google Patents

Abstract

Spatial precast monolithic frame

The utility model is intended for the construction of buildings for various purposes with a load-bearing system of structures, including a complete shea incomplete frame of single-storey non-console columns and rigidly connected prefabricated monolithic flat continuous floors.

The essence of the utility model consists in the fact that the prefabricated slabs are supported by corners on the ends of the columns and are rigidly fixed to them from rotation by means of the studs passed through the vertical channels and the welding of embedded parts. The plates are equipped with open rectangular grooves along the contour of the upper face and triangular key grooves on the side faces. Placing in the grooves of the plates of the upper longitudinal and transverse reinforcement, fixing part of the longitudinal rods by welding to embedded parts and inserting into anchor channels and filling all the grooves with cast concrete provides after hardening the formation of a spatial frame structure with a continuous disk overlap.

Posted by: В.Л. Morozensky

ESSAY

Description

for issuing a utility model certificate Spatial precast monolithic frame

The utility model is intended for the construction of single-storey and multi-storey buildings for various purposes with a supporting system of reinforced concrete structures, including a full or incomplete frame of single-story columns and rigidly connected prefabricated monolithic flat continuous floors.

A well-known universal KUB framework with prefabricated monoblock and bezkapalny overlappings, consisting of intercolumn and noncolumn plates 1. The latter are connected to the columns with a hole framed by a steel collar, which, after stringing all the shafts on a multi-story column, is welded when installed on the project mark to the outlets working reinforcement columns.

The drawbacks of this system are the need to use a full frame, the technologically complicated design of prefabricated slabs with outlets along the contour, the use of suspended formwork for monoling wide joints between plates, complex welded joints to create rigid nodes for interfacing floors with columns.

Also known is a frame with precast monolithic continuous ceilings of flat precast reinforced concrete slabs, supported by corners directly on the ends of one-story columns and rigidly fixed to them by releases of working reinforcement. The slabs are connected in continuous overlap by freely laying the upper longitudinal working reinforcement in open rectangular grooves along the contour of their upper face and hardening the monolithic concrete laid in these grooves, as well as in triangular grooves along the side faces of the plates 2.

The disadvantages of this system are the difficulty of rigidly fixing the corners of the slabs using the releases of the working reinforcement from the ends of the columns, as well as ensuring the continuity of the ceilings and the redistribution of forces in them

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Posted by: В.Л. Morozensky

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REQUEST

only due to the adhesion strength of precast and newly laid monolithic reinforced concrete.

To eliminate these drawbacks, expand the area of design integration and reduce the complexity of production and construction, a useful carcass model is proposed, including (Fig. 1, 2, 3): one-story reinforced concrete columns 1 of a rectangular continuous section with steel sheets on the torps 2, from which the bolts studs 3 to the height of the overlap; prefabricated floor slabs 4 with an open straight groove 5 along the upper edge of at least two slab thicknesses and a depth of at least 1/4 slab thickness, equipped with support embedded parts 6 in the corners and through vertical channels 7 for passing stud bolts 3 when supported plates 4 on the ends of the columns 1 or on the console of the supporting external walls 8 (incomplete frame). After supporting the plates, their angles are fixed from rotation by tightening the steel washers 9 on the stud bolts 3 or securing the upstream columns (see Fig. 2, b) and mainly by welding their supporting embedded parts 6 with end sheets 2 of columns 1 within the vertical clippings 10 on the side faces at the corners of precast plates 4.

Continuity of the overlap is ensured by installing the upper horizontal working reinforcement (span 11 and supporting 12) and hardening the monolithic concrete 13, laid in open grooves 5 along the contour of the upper face of the slabs so that they are connected together by coupling prefabricated and monolithic concrete cross reinforced belts for the perception of bending moments. Part of the upper support armature 14 can be made in the form of separate conventional rods welded to embedded parts 15 located on the support sections of open rectangular grooves 5 (see Fig. 3, b). The upper supporting reinforcement 14 can also be made of prestressed rods or strands fixed to the stops 16 welded to the embedded parts 15 and monolithic with concrete laid in rectangular grooves 5.

To increase the anchoring of the rods of the supporting reinforcement 14 of the ceilings, their bent ends are led into the vertical conical channels 17 located in the supporting zone of the rectangular grooves 5 and monolithic when filled with concrete (Fig. 3, c).

To ensure the joint work of the plates in continuous overlap along their lateral vertical faces, a longitudinal open groove of triangular section 18 is arranged, which, after monolithic, ensures the creation of continuous diamond-shaped dowels along the contour of the plates to transmit shear and spacer forces. In order to increase the strength of the support zones on the action of transverse forces in rhomboid concrete concrete, transverse reinforcement is installed in the form of welded frameworks of cross section 19 or wound spiral 20 of ordinary wire.

Posted by: Х В.Л. Morozensky

1.Dorfman A.P., Levantin L.N. Design of beam-free and capless floors. -M .; Stroyizdat, 1975 -128 Art.

2, Morozensky V.L. Frame with prefabricated monolithic continuous continuous flat ceilings and single-storey non-console columns. Utility Model Certificate 2 000071 for application JS 93028646/33. Bulletin Utility Models and Industry: Samples, No. 9, -M., 1994.

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Claims (5)

1. Spatial precast-monolithic frame, including flat continuous floors and single-storied non-cantilever columns, characterized in that prefabricated floor slabs are directly supported by embedded parts in corners on steel sheets at the ends of single-storied columns, fixed to them using stud bolts passed into vertical channels and welds within vertical cuts on the side faces, precast plates are connected to each other by upper horizontal reinforcement, part of which is fixed to embedded parts sat slabs, placed in a layer of monolithic concrete, laid on the site in open horizontal grooves of rectangular section arranged along the contour of the upper face of precast slabs with a width of at least 2 and a depth of at least 1/4 of their thickness, as well as monolithic diamond-shaped sections with dowels formed during filling solid concrete horizontal grooves of a triangular section, on the side faces of adjacent precast plates.  2. The frame according to claim 1, characterized in that the rods of the upper supporting reinforcement are welded to embedded parts of prefabricated plates located on the supporting sections of the horizontal grooves, until they are filled with cast concrete.  3. The frame according to claim 1, characterized in that the upper supporting reinforcement of the ceilings is made of prestressed rods or strands fixed to the stops welded to the prefabricated plate prefabricated parts and monolithic concrete laid in their horizontal grooves.  4. The frame according to claim 1, characterized in that, in order to increase the anchoring of the rods of the upper supporting reinforcement of the floors, their bent ends are led into vertical conical channels located in the supporting zone and filled with concrete when monolithing the horizontal grooves of the precast plates. 5. The frame according to claim 1, characterized in that in the supporting zones of the precast slabs, diamond-shaped concrete dowels on their lateral faces are provided with transverse reinforcement in the form of welded cross-section frames or a wound spiral of reinforcing wire.