RU142157U1 - MILITARY MONOLITHIC REINFORCED CONCRETE FRAME OF MULTI-STOREY BUILDING - Google Patents

Abstract

The precast-monolithic reinforced concrete frame of a multi-story building, including precast reinforced concrete columns, prefabricated crossbars and hollow-core slabs with gaps between their ends, which are monolithic at the same time with the reinforced outlets released into them on the upper edge of the loop-shaped outline, located in the gap between the slabs of the precast rigs characterized in that the columns of the continuous section are made on several lower floors, the columns of the upper floors are made hollow with a longitudinal hole of cylindrical shaped with open and monolithic ends, open ends have reinforcement outlets, continuous section columns from one end and monolithic ends of hollow columns have a truncated cone protrusion, moreover, the diameter of the base of the truncated cone is smaller than the diameter of the column opening, these ends also have grooves for entry of outlets reinforcement at the junction of the columns in height, prefabricated crossbars are made hollow.

Description

The utility model relates to the construction, namely the construction of prefabricated monolithic frame buildings for various purposes.

From the existing level of technology, the precast-monolithic frame of the Sochi multi-story building is known, consisting of reinforced concrete columns and precast-monolithic floors. The overlap consists of standard multi-hollow reinforced concrete panels between the ends, which are monolithic crossbars (main beams) are concreted within the thickness of the panels. On the long sides of the panels, gaps are left in which monolithic secondary beams are formed. The columns of the frame are made of a solid square or rectangular section. (Recommendations for the design of structures of flat prefabricated-monolithic floors "Sochi": ed. 3rd. - M: Stroyizdat, 1975. - pp. 3-4). The disadvantage of the frame is the need for additional costs for the formwork for the main and secondary beams.

Also known is the precast-monolithic frame of the multi-storey building "RADIUSS", the overlap of which also consists of hollow-core slabs between the ends, which are monolithic crossbars concreted within the thickness of the panels. In the perpendicular direction, the plates are laid without gaps. The columns of the frame are made of a solid square or rectangular section. (A. S. Semchenkov. Justification of the regionally adaptable universal industrial building system “RADIUSS” - Concrete and reinforced concrete, 2008, No. 4. - p. 2-6.). The disadvantage of the frame is the need for additional costs for the formwork device for monolithic crossbars.

The prefabricated monolithic frame of the building is also known, the overlapping of which also consists of multi-hollow plates between the ends, which are monolithic crossbars of variable length width are concreted within the thickness of the panels. The columns of the frame are made of a solid square or rectangular section (patent of the Russian Federation No. 2226593, 04/10/2004, CL E04B 1/18). The disadvantage of the frame is the need for additional costs for the formwork device for monolithic crossbars.

The prefabricated monolithic frame of a multi-storey building is also known (patent of the Russian Federation No. 2182624, 05.20.2002, class E04B 1/20). The frame of the building, structure is made of columns, girders and ceilings, which are formed using hollow slabs, and the girders are prefabricated-monolithic in the form of spatial bodies with a prefabricated lower broadened part and monolithic narrowed relatively lower upper part in the form of an extended polyhedron with a cross section, mainly in the form of a rectangle or trapezoid with the formation in combination with the prefabricated part of a single bearing profile with local broadening in the form of protrusions located along the length of the crossbar pitch corresponding step voids simply supported on the bolt slabs, wherein the protrusions are extended in the directions of the axes of the voids have a length of at least 1/3 of the thickness of the respective plates, and are arranged in the support areas and priopornyh plates voids. The columns are continuous. On the upper floors, the cross-section of the columns may decrease.

A disadvantage of the known solution is the implementation of crossbars and columns of continuous section, which increases the material consumption of the frame.

The precast-monolithic reinforced concrete frame of the multi-storey building "KAZAN-XXIv" (patent of the Russian Federation No. 2281362, IPC E04B 1/20 (2006.01)) is also known, it includes prefabricated reinforced concrete columns with holes in the level of the floors and a curved channel in the lower part of the floor section of the columns prefabricated crossbars with releases of reinforcement on the upper face and at the ends, and on the upper face of the supporting part, rectangular shtabs for laying mounting supporting reinforcement and hollow core slabs, the end surfaces of which are made inclined to the plane of the plate s along its entire height with a slope of 14-16 °. Reinforced concrete columns running on several floors have different cross-sectional shapes: square, rectangular and angular, while maintaining the base size of the core section and a fixed number of reinforcing bars within the base core. The joint of the columns in height is made in the form of a plug connection, while the ends of the columns have outlets of fittings and grooves, which include outlets of fittings. The frame elements are connected to each other after laying the supporting reinforcement and combining them with loop clamps located across the width of the prefabricated crossbar, and is ensured by monoling the prefabricated crossbar along the upper face with the simultaneous flow of concrete into the holes of the columns.

A disadvantage of the known frame is the change in the area of the premises, due to the change in the cross-sectional shape of the columns, and also, since the joints of the columns are usually performed at a height of 600-800 mm from the top of the crossbar, an unaesthetic appearance of the junction of the columns of different sections.

Also known is the precast-monolithic reinforced concrete frame of the multi-storey building "KAZAN-1000 m (patent of the Russian Federation No. 2184816, 06/10/2002, class Ε04В 1/20), including prefabricated reinforced concrete columns with holes, pre-assembled prestressed crossbars with horizontal recesses of triangular section on end faces and hollow core slabs with a gap between their ends made oblique to the plane of the plate with an angle of inclination of 25-30 °, while the gaps between the ends of the plates and the holes in the columns are monolithic at the same time with by pressurized releases from prefabricated frame elements.The height of the columns is made in the form of a plug connection in the middle zone of the floors.

The design drawback is the impossibility, due to the constant cross-sectional size of the columns along the building height, of significantly increasing their bearing capacity by installing additional reinforcing bars, the number of which, according to the features of the frame, should be equal to four, as well as the impossibility of simply increasing the cross-section of the columns, as this will lead to an increase in thickness walls and, as a result, loads on the building as a whole, and when applying a smaller thickness of the outer wall of the column will go out of the plane of the outer wall building, which leads to a decrease in the aesthetic appeal of the premises, particularly in multi-storey residential building frame, wherein the column should be hidden in the outer wall thicker.

The closest in purpose and achieved effect is the precast-monolithic reinforced concrete frame of the multi-storey building "Muscovy". The frame includes prefabricated reinforced concrete columns with holes in the level of the floors, prefabricated prestressed crossbars and floor slabs with gaps between their ends, which together with the holes in the columns are monolithic at the same time as the reinforced outlets from the prefabricated frame beams released into them. Reinforced concrete columns running over several floors have prestressed reinforcement, including within the openings at the level of the ceilings, where the reinforcement is passed through thick-walled pipes. The joint of the columns in height is carried out by landing the lower part of the column of the upper tier, having a wedge-shaped end in the form of a square pyramid, in the wedge-shaped recess of the embedded part in the upper part of the column of the lower tier.

A disadvantage of the known solution is a significant increase in the metal consumption of the columns in connection with the introduction of pipe channels for the passage of reinforcement in the zones of the openings in the levels of the floors and the installation of additional metal embedded parts at the junction of the columns in height.

The technical result is the creation of a constructive frame system for the construction of buildings with increased number of storeys, which reduces material consumption (concrete consumption reduction by 10-30%) due to the use of hollow elements, high manufacturability of the frame assembly due to the improvement of the frame column coupling nodes in height and the aesthetic attractiveness of residential premises .

The precast-monolithic reinforced concrete frame of a multi-storey building includes prefabricated reinforced concrete columns, prefabricated crossbars and round hollow floor slabs with gaps between their ends, which are monolithic at the same time with the reinforced outlets released on them on the upper edge of the loop-shaped outline, located in the gap between the overlapping plates of the precast crossbars. According to a utility model, solid-section columns are made on several lower floors, upper-floor columns are hollow with a cylindrical longitudinal hole with open and monolithic ends, open ends have reinforcement outlets, solid section columns from one end and monolithic ends of hollow columns have a truncated protrusion the cone, moreover, the diameter of the base of the truncated cone is less than the diameter of the column opening, also these ends have grooves for the entrance of the valve outlets at the junction of the columns in height, prefabricated slab gels are made hollow.

Concrete consumption in the columns of the upper floors is reduced by 10-30%.

The ends of the columns of the upper tiers have reinforcement outlets, and the ends of the columns of the lower tiers have grooves where the outlets of the reinforcement are included.The result is achieved in the same way that the crossbars are hollow, which will reduce concrete consumption by 10-30%).

The technical solution is illustrated by drawings, which depict:

- in FIG. 1 - fragment of the mounting plan of the cell frame

- in FIG. 2 is a transverse section along aa.

- in FIG. 3-section of a solid column 2-2

- in FIG. 4 - section of the hollow column 1-1

- in FIG. 5 - section crossbar 3-3

- in FIG. 6 - node pair columns "A" before installation

- in FIG. 7 - node pair columns "A" in assembled form

- in FIG. 8 - section 5-5

- FIG. 9 - joint of hollow columns in height

The precast-monolithic reinforced concrete frame includes solid cross-section columns 1 made on several lower floors, hollow columns of the upper 2 floors are hollow with a longitudinal hole with open and monolithic ends, precast crossbars 3, hollow core slabs 4 with gaps between their ends, which are monolithic at the same time with rebar releases from prefabricated crossbars released into them. Columns 1 of the lower and hollow columns of the 2 upper floors have longitudinal reinforcement 5. For hollow columns of 2 upper floors of the frame, the longitudinal hole 6 has a cylindrical shape. The prefabricated crossbars 3 have a void 7 and the outlets of the transverse reinforcement 8 on the upper edge of the loop-like outline located in the gap between the floor slabs 4, which are monolithic at the same time as the reinforced outlets of the prefabricated crossbars 3 of the cage released into them, the open ends of the columns have outlets of the reinforcement 9, solid cross-section columns from one end and the monolithic ends of the hollow columns have grooves 10 for the entrance of the valve outlets at the junction of the columns in height (plug joint).

Columns 1 of a continuous section from one end and the monolithic ends of hollow columns 2 have a protrusion in the form of a truncated cone 11, moreover, the diameter of the base of the truncated cone is less than the diameter of the hole 6 of the column.

The joint of the column 1 of the continuous section of the lower floors with the hollow columns of the 2 upper floors in height is carried out by landing hollow columns of the 2 upper floors with an open end on the solid column of the 1st section of the lower floors, the end of which has a protrusion in the form of a truncated cone 11, moreover, the diameter of the base of the truncated cone 11 should be less than the diameter of the hole 6 of column 2 by 5-10 mm, and the height of the truncated cone is 200-300 mm. Similarly, the joint of the hollow columns 2 is carried out among themselves: the lower column has a continuous end with a protrusion in the form of a truncated cone, on which the upper column is mounted, with an open end.

Claims (1)

The precast-monolithic reinforced concrete frame of a multi-story building, including precast reinforced concrete columns, prefabricated crossbars and hollow-core slabs with gaps between their ends, which are monolithic at the same time with the reinforced outlets released into them on the upper edge of the loop-shaped outline, located in the gap between the slabs of the precast rigs characterized in that the columns of the solid section are made on several lower floors, the columns of the upper floors are hollow with a longitudinal opening of cylindrical shaped with open and monolithic ends, open ends have reinforcement outlets, continuous cross-section columns from one end and monolithic ends of hollow columns have a truncated cone protrusion, and the diameter of the base of the truncated cone is smaller than the diameter of the column opening, these ends also have grooves for the inlet of the outlets reinforcement at the junction of the columns in height, prefabricated crossbars are made hollow.

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