RU2519082C2 - Cast-in-place and precast reinforced concrete frame of building, structure - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to the field of construction. A cast-in-place and precast frame of a building, a structure is a building structure with higher stiffness of the frame and increased bearing capacity of the slab. In the frame they use bonding of bent reinforcing ropes of crossbars in monolithic crossbar-column units. The slab crossbar-column units are made with concrete dowels, which are limited by plugs with holes, through which reinforcement stretches in a transit manner, being common for opposite slabs and embedded into dowels and holes of plugs. To control filling of dowels with concrete, there are holes in slabs arranged above plugs. To increase span of bearing crossbars and their bearing capacity, the lower protective level of concrete is reduced to the permissible one (25-30 mm). To achieve the same purpose, it is possible to use high-grade concrete and reinforcement of at least class A500 in production of crossbars. To increase efficiency of labour and considerable reduction of monolithic works, also under negative temperatures, to support external masonry they use prefabricated cantilevers instead of monolithic ones.

EFFECT: invention makes it possible to increase stiffness of frame untis and bearing capacity of a slab.

4 cl, 7 dwg

Description

The invention relates to the field of construction and can be used in the construction of residential and public buildings of any number of storeys.

Several reinforced concrete frameworks are known: the BELGPI framework according to the invention patent No. 2202026 of the Russian Federation, Cl. EB04 1/18, 2003; frame of a multi-storey building according to the patent for invention No. 2226593 of the Russian Federation, Cl. E04B 1/18, 2004; precast-monolithic reinforced concrete frame of the multi-storey building "Kazan-1000" (RF patent No. 2184816, 06/10/2002, Cl. EB04 1/20); the prefabricated reinforced concrete frame of the building according to the utility model patent No. 73680 Е04В 1/18 (2006.01), the disadvantages of which are, for example, insufficient rigidity of the nodes, reinforcement of the load-bearing crossbar without prestressing, limited span of the crossbar, and a number of other disadvantages.

The frame of the SCOP PPB system building was adopted as a prototype of the invention (see "Reference manual for Construction Norms and Regulations 2.03.01-84. Design of reinforced concrete prefabricated-monolithic structures", Fig. 40) with a multi-hollow slab-crossbar interface unit (see "Reference manual for SNiP 2.03.01-84. Design of reinforced concrete precast-monolithic structures ", Fig. 39). The disadvantages of this frame are, for example, the design of the crossbars, which are made with samples at the ends for a monolithic connection of the crossbar with the column, and these samples are made with a “bottom” 55-65 mm thick, due to which the protective layer of the bottom reinforcement is unreasonably overestimated, which leads to increased consumption of reinforcement and insufficient rigidity of the joints of the crossbar-column and multi-hollow plate-crossbar.

The task of the invention is to increase the rigidity of the frame nodes, the bearing capacity of the overlap, the increase in the span of the bearing beam and the increase in labor productivity and quality of work, including at low temperatures.

To achieve the indicated technical result, the following is proposed: the first is to apply the dressing of the bent outlets of the reinforcing ropes in monolithic units, and to perform the crossbar-slab assembly with monolithic dowels, which in the void of the plate are limited by plugs with an opening through which reinforcement is common, which is common for oncoming plates moreover, to control the filling of the keys with concrete, holes are provided in the slabs, the second - in large-span crossbars, to lower the lower protective layer of concrete to an acceptable (25-30 mm), and if necessary In fact, in the production of crossbars, use high-quality concrete and reinforcement of a class not lower than A500, which will significantly increase the span and bearing capacity of the crossbar, the third is to use prefabricated consoles to support the external masonry instead of monolithic, which will increase labor productivity, and will significantly reduce monolithic work, in including at low temperatures.

The invention is illustrated in the drawings.

Figure 1 shows a plan of overlap;

figure 2 presents the cross section of the node crossbar-slab;

figure 3 presents the cross section of the node of the crossbar-column with a reduced protective layer;

figure 4 shows the design of the crossbar with a reduced protective layer;

figure 5 shows the design of the crossbar;

figure 6 presents the cross section of the node crossbar-slab.

figure 7 shows the design of the prefabricated console;

The precast-monolithic reinforced concrete frame of the building, structure is a building structure with increased rigidity of the frame units and increased bearing capacity of the floor, in which the span of the load-bearing beam and the increase in labor productivity and quality of work, including at low temperatures, are possible. The frame of the building, structure consists of columns 1 (Figs. 1, 3 and 6) and a ceiling that is formed by floor slabs 2 (Figs. 1 and 2), bearing crossbars 3 (Figs. 1, 3 and 6) and connecting crossbars 4 ( figure 1). In the frame, bandaging of bent outlets 5 (Fig. 3 and 6) of reinforcing ropes in monolithic crossbar-column assemblies is used, and the crossbar-slab assembly is made with concrete keys 6 (Fig. 2), limited by plugs with holes 7 (Fig. 2) through which the reinforcement 8 (Fig. 2) passes, which is common for oncoming plates, monolithic in the keys 6 (Fig. 2) and the holes of the plugs 7 (Fig. 2), and for monitoring the filling of the keys with concrete, holes 9 are provided (Fig. 2) ) located above the traffic jams. The monolithic part of the crossbar 10 (Fig.3 and 6) is filled with concrete. Also, the lower protective layer of concrete was reduced to an acceptable (25-30 mm) (Fig. 3) and prefabricated consoles (Fig. 7) were used instead of monolithic to support the external masonry.

Claims (4)

1. The precast-monolithic reinforced concrete frame of the building, which is a building structure, consisting of columns having concrete gaps in the plane of overlap for a monolithic nodal connection, in which precast-monolithic bearing and communication beams are combined with columns and an overlap consisting of floor slabs, supported directly to the supporting crossbars, and the connecting crossbars, characterized in that the ligation of the bent reinforcing ropes of the crossbars in monolithic crossbar-column nodes is applied, and the crossbar-slab nodes are made enes with concrete dowels which are limited stoppers with holes through which passes the transit fittings common to counter plates and rendered monolithic holes in the dowels and plugs. 2. The precast-monolithic reinforced concrete frame of the building according to claim 1, characterized in that for monitoring the filling of the dowels with concrete, holes are provided in the slabs located directly above the cork. 3. The precast-monolithic reinforced concrete frame of the building according to claim 1, characterized in that the lower protective layer of concrete of the crossbar is reduced to an acceptable (25-30 mm), and in the manufacture of crossbars, high-quality concrete and reinforcement of a class not lower than A500 are used. 4. The precast-monolithic reinforced concrete frame of the building according to claim 1, characterized in that prefabricated consoles are used to support the external masonry.

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