RU2793090C1 - Prefabricate monolithic joint bearing against platform - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention is intended for making joint bearings against platforms. The prefabricated-monolithic joint against a platform includes multi-hollow floor slabs located in mutually perpendicular directions in the plan above adjacent rooms, held by the upper plane of the prefabricated part of the crossbar of the bearing wall panel-frame, made in form of an inverted U-shaped structure. Panel-frames with holes in the lower part of the post for the entire height of the element of the monolithic part of the crossbar are centred on the post of the underlying panel-frame by means of a cylindrical or conical embedded part. Reinforcing outlets in racks of panel-frames are connected to outlets of working reinforcement of racks of the overlying frame-panel. Reinforcing bars are installed in the supporting part of the panel-frame rack, which are bent into the monolithic part of the crossbar and connected to the longitudinal bars of the crossbar. The joint area of the inverted U-shaped panels, the opening in the rack of the panel-frame and the space between the ends of the plates are made monolithic together with the reinforcing outlets along the upper edge of the crossbars of the panel-frames and the outlets in form of grids from the upper shelf of the multi-hollow panel, forming a hard floor disc.

EFFECT: increase of spatial rigidity.

1 cl, 3 dwg

Description

The present invention relates to the field of construction and is intended for the device of prefabricated-monolithic joints of panel-frames and ceilings with increased bearing capacity and rigidity, aimed at creating a safe structural system of panel and panel-frame residential and civil buildings with increased survivability and spatial rigidity, providing perception changing power flows under special and emergency impacts and protection against progressive collapse.

A well-known platform prefabricated-monolithic joint (RF patent No. 2 281 365 C2, publication date 08/10/2006, authors Kolchunov V.I., Safonov G.A., Klyueva N.V., Meleshkova E.A.), including multi-hollow slabs floors supported by internal load-bearing wall panels and reinforced with a vertical frame, filled with concrete between the ends of the wall panels and the supporting sections of the floor slabs, in the voids of the floor slabs facing the end of the slab, at a distance exceeding the thickness of the panel, concrete diaphragms with a thickness of at least 30 mm, in the same end along the edge in the upper thin part of the slab above the voids, rectangular holes are made in plan to a depth from the upper surface of the slab to the void, in the upper part of the concrete of the embedding of the joint over the entire width of the embedding section, a reinforcing mesh is additionally laid, which in plan has rectangular protrusions overlapping said monolithic sections in rectangular holes arranged at the ends of the slab above the voids.

The disadvantage of the described design solution is that this joint does not provide a rigid connection between the floor slabs and the wall panels, which is an important factor for improving the overall spatial stability of the building and the survivability of these structures under special and emergency impacts. Platform joints of internal wall panels in height, made in a prefabricated version, have a relatively low bearing capacity, which limits the number of storeys when using such a structural system, reduces its structural safety and does not provide protection against progressive collapse during design and especially beyond design impacts.

A building frame made of panel elements is known (RF patent for the invention No. 2 506 385 C1, publication date 10.02.2014, authors Ilyichev V.A., Kolchunov V.I., Klyueva N.V., Bukhtiyarova A.S., RU) , which includes load-bearing panels of the building made in the form of reinforced concrete frame panels, the crossbar of which is made with thermal connectors and has reinforcing outlets, floor panels are located in plan above adjacent overlapped rooms in mutually perpendicular directions, platform joints of wall panels and floor slabs are monolithic together with reinforcing outlets, protruding from the upper surface of the crossbars of wall panels-frames.

The disadvantage of such a constructive solution is that the reinforcing cage installed in the concrete embedded between the ends of the floor slabs does not provide a rigid connection of the floor slabs between themselves and the racks of the wall panels under special impacts, which is an important factor for increasing the survivability of the frame and ensuring the protection of the building from progressive collapse. The described design of the platform joint is not designed to resist progressive collapse. Thus, the design of the analogue has insufficient operational reliability.

The closest to the claimed solution is a platform prefabricated-monolithic joint (RF patent for the invention No. 2 627 524 C2, publication date 08.08.2017, authors Klyueva N.V., Korenkov P.A., RU), including those located in the plan above adjacent rooms in mutually perpendicular directions of multi-hollow floor slabs supported on internal load-bearing wall panels having openings, the upper zone of the panel is reinforced with a frame that has outlets from the plane of the upper face of the panel on which the floor slabs rest. At the ends of the upper flange of the floor panels there are cutouts for the installation of dowels, platform joints of wall panels and floor panels are monolithic together with reinforcing protrusions along the upper surface of the crossbars of the frame panels.

The disadvantage of such a constructive solution is that in the described design there is a rigid interface between the upper and lower panel-frames due to the installation of a reinforcing cage structure that forms a monolithic reinforced belt between the floor slabs, but it does not provide a rigid interface between the upper rack of the panel-frame and the underlying crossbar structure. panel-frames, as a result of which the design of such a platform joint does not protect the building from progressive collapse when one of the racks of the panel-frames is suddenly removed.

The technical result, to which the invention is directed, consists in the device of prefabricated-monolithic joints of panels-frames and ceilings with increased bearing capacity and rigidity, providing the perception of power flows changing in the structure under a special impact caused by the sudden removal of one of the bearing elements.

This is achieved by the fact that in the platform prefabricated-monolithic joint, the racks of the inverted U-shaped panel-frames are made with reinforcing outlets that are connected by bath welding with the outlets of the working reinforcement of the racks of the overlying panel-frame, and reinforcing bars are installed in the supporting part of the frame-panel rack, which are bent into the monolithic part of the crossbar and overlapped with the longitudinal rods of the crossbar. In addition, hollow-core floor slabs, supported on the upper shelf of the prefabricated part of the crossbar of the bearing wall panel-frame, have reinforcement outlets in the form of a grid from the upper shelf of the multi-hollow slab, which overlap the reinforcement outlets protruding from the upper plane of the prefabricated part of the crossbar. The junction area of the inverted U-shaped panels, the opening in the rack of the frame panel and the space between the ends of the plates are monolithic together with the reinforcing outlets that are available on the upper surface of the prefabricated part of the crossbars of the wall frame panels and outlets in the form of grids from the upper shelf of the multi-hollow panel, forming a prefabricated monolithic horizontal hard disk overlay.

The objective of the invention is to increase the protection of the frame from progressive collapse with a sudden change in direction and values of effort from a special impact in the form of removing one of the racks of the frame panel.

The essence of the invention is illustrated by drawings:

In FIG. 1 shows a general view of the platform prefabricated-monolithic joint in isometry.

In FIG. 2 is a section of the junction of two panel-frame elements along the height.

In FIG. 3 section 1-1.

Platform prefabricated-monolithic joint, includes multi-hollow floor slabs (1) located in mutually perpendicular directions in the plan above adjacent rooms, supported on the upper plane of the prefabricated part (2) of the crossbar of the supporting wall panel-frame, made in the form of an inverted U-shaped structure, in the form of two racks (3) and a prefabricated part (2) of the crossbar. In the voids of the floor slabs (1) facing the end of the slab, at a distance exceeding the thickness of the panel, concrete diaphragms (4) are arranged, at the end there are dowels (5) trapezoidal in plan with a through hole for the entire thickness of the upper shelf of the slab. Wall panel-frames with holes in the lower part of the post (3) for the entire height of the element of the monolithic part (6) of the crossbar are centered on the post (3) of the underlying panel-frame by means of a cylindrical or conical embedded part (7), which is installed on the lower edge of the prefabricated part (2) of the crossbar and on the upper end of the underlying post (3) of the frame panel. In the racks (3) of the panel-frames there are reinforcing outlets (8), connected by bath welding (9) with the outlets of the working reinforcement of the racks of the overlying frame-panel, passed through the grooves of the cutout of the prefabricated part (2) of the crossbar. Reinforcing rods (10) are installed in the supporting part of the post (3) of the frame panel, which are bent into a monolithic part (6) of the crossbar and overlapped with the longitudinal rods (11) of the crossbar. The working rods of the monolithic part (6) of the crossbar are anchored at the ends into the anchor elements (12). Reinforcing outlets protruding from the prefabricated part (2) of the crossbar are covered with reinforcement outlets in the form of meshes (13) from the upper flange of the multi-hollow slab. Platform joints of wall panels-frames and floor slabs (1) are embedded together with reinforcing outlets located on the upper surface of the prefabricated part (2) of the crossbars of wall panels-frames and outlets in the form of grids (13) from the upper shelf of the multi-hollow slab (1).

The operability of the proposed structural system is ensured as follows. Racks of load-bearing wall panels-frames are connected by reinforcement outlets to the overlying panel, and reinforcing bars are installed in the supporting part of the frame-panel rack, bent into the monolithic part of the crossbar and connected to the longitudinal working rods of the monolithic part of the crossbar. Reinforcing outlets in the form of meshes from the upper flange of a multi-hollow slab overlap the reinforcement outlets from the upper plane of the prefabricated part of the crossbar and, after filling the monolithic part of the crossbar, the space between the ends of the plates and the openings in the racks of the frame panels with monolithic concrete, form a prefabricated-monolithic horizontal hard disk of the floor. Such a solution, in the aggregate of all elements, has increased rigidity, ensures the perception and transfer of vertical and horizontal loads from one element of the building frame to another in the event of a special impact, in the form of emergency shutdown of individual frame structures - any of the panel-frame racks.

Thus, the proposed technical solution makes it possible to ensure the perception of power flows changing in the frame under a special impact caused by the sudden removal of one of the bearing racks, and as a result, to increase the resistance of the frame to local and progressive collapse under special emergency effects.

Claims (1)

Platform prefabricated-monolithic joint, including multi-hollow floor slabs located in the plan above adjacent rooms in mutually perpendicular directions, supported on the upper horizontal plane of the prefabricated part of the crossbar of the supporting wall panel-frame, in the voids of the floor slabs facing the end of the slab, at a distance exceeding the thickness panels, concrete diaphragms are arranged, at the end there are dowels trapezoidal in plan with a through hole for the entire thickness of the upper shelf of the slab, characterized in that the wall panels-frames are made in the form of an inverted U-shaped structure with holes in the lower part of the racks for the entire height of the monolithic element parts of the crossbar of the panel-frame, which is centered on the posts of the underlying panel-frame by means of a cylindrical or conical embedded part, the posts of the panel-frame are connected to each other at the outlets of the longitudinal working reinforcement by means of a bath welding, reinforcing bars are installed in the supporting part of the rack of the frame panel, which are bent into the monolithic part of the crossbar and overlapped with the longitudinal rods of the crossbar, the longitudinal and transverse rods protruding from the prefabricated part of the crossbar are overlapped with reinforcement outlets in the form of grids protruding from the upper shelf of the multi-hollow floor slabs, the space between the ends of the floor slabs and the opening in the uprights of the frame panels together with all reinforcing elements it is monolithic with concrete.

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