RU174241U1 - STEEL CONCRETE STAND - Google Patents

Abstract

The utility model relates to the field of construction, namely to composite racks, and can be used in structural elements that work primarily on compression. The result is achieved by the fact that the steel-concrete strut is made of profiles forming a composite cross-section, the cavities of which are filled with concrete. sections bent C-shaped profiles with perforated and stamped wall studs are bent in the middle of the wall at an angle of 90 ° and paired with stamped studs included in mutually formed by the holes vyshtampovki adjacent profiles. To improve the joint work of the concrete core and the steel profile, the perforated holes in the profile walls are filled with concrete, which act as keys, increasing the adhesion of the concrete core to the steel profile. The proposed steel-concrete stand, in comparison with the known solutions, has increased bearing capacity, stability and reduces material consumption and simplifies manufacture.

Description

The utility model relates to the field of construction, namely to racks of a composite section, and can be used in structures that work mainly on compression.

A steel-concrete stand is known, including a cross-section steel profile, the cavities of which are filled with concrete [see Eurocode 4: Design of composite steel and concrete structures. EN 1994-1-1 (2004), p. 64, fig. 6, 17 c.].

The disadvantages of this steel-concrete strut are reduced adhesion of concrete to the steel profile and, as a result, the overall reduced bearing capacity of the composite strut.

A steel-concrete stand is known, including steel rolling profiles and a concrete core, in which steel rolling profiles are connected to the profiled sheets and limit the concrete core along the perimeter (see RF Patent No. 2122083, E04C 2/28, 1998).

The disadvantage of a steel-concrete strut is: profiled sheets are located corrugated across the element, which increases the deformability of the cage in the longitudinal direction, when filling with concrete it is impossible to control the quality of concreting, because the section of steel profiles and profiled sheet has a closed loop.

The closest is a steel-concrete stand containing a steel cross-sectional profile and a concrete core (see RF Patent No. 117475, Е04С 3/30293, publ. 27.06.2012, bull. No. 18).

The disadvantages of the support rack are the material consumption of the steel part, the complexity and busyness, because rolling brands with a steel core must first be fixed on a template, then connected to electric welding.

The utility model is aimed at reducing material consumption and laboriousness, at increasing the overall bearing capacity of a steel concrete rack from steel cold-formed C-shaped profiles forming a cross-section.

The result is achieved in that in a steel-concrete stand including a steel curved profile of a C-shaped section having filling concrete according to a utility model, bent C-shaped profiles are perforated and with stamped pins are bent in the middle of the wall height at an angle of 90 °, paired without welding together due to the bends of the stamped studs mutually included in the formed holes from the stamping.

In FIG. 1 depicts a steel-concrete stand, consisting of profiles forming a composite cross-section and with monolithic concrete; in FIG. 2 is a section AA of FIG. one; in FIG. 3 is a section BB of FIG. one; in FIG. 4 - a fragment of a C-shaped profile with perforation and stamped pins; in FIG. 5 is a perspective view of a profile bent at an angle of 90 °; in FIG. 6 is a fragment of the pairing of C-shaped profiles, in FIG. 7 - node A connecting the walls of the C-shaped profile of FIG. 6.

The steel-concrete stand includes bent steel bent profiles 1 of FIG. 3, 5 and concrete monolithic 2 (Fig. 1 and 2). To ensure the joint work of C-shaped profiles 1, studs 3 are stamped in its walls (Fig. 4), which are inserted into the formed holes from the stamping of paired adjacent profiles 1 and bent tightly to the walls of the adjacent profile (Fig. 6, 7). To improve the joint work of concrete core 2 and steel profile 1, holes 4 are stamped in the walls of profile 1 (Fig. 5), except for the support zone, filled with concrete 2, which serve as dowels, increasing the adhesion of concrete core 2 to steel profile 1 (Fig. 2 )

In the factory, the pins 3 are stamped and the holes 4 are punched, then the C-shaped profiles 1 are bent at an angle of 90 ° in the middle of the wall height, paired with each other by inserting the pins 3 into the formed holes from the stamping and bent tightly tightening the walls.

After the preparatory procedures, monolithic concrete is made of the lateral cavities (Fig. 1, 2) of the cross-shaped section of the rack.

This embodiment of the rack allows to reduce the busyness and the complexity of its manufacture and increases the stability and overall bearing capacity of the steel concrete rack. The steel concrete stand has, along with increased bearing capacity, also reliability, reduced material consumption.

Claims (2)

1. Steel-concrete stand, including steel profiles, forming a cross-section and concrete monolithic, characterized in that the walls of bent C-shaped steel profiles are perforated and stamped studs. 2. Steel-concrete stand according to claim 1, characterized in that the bent C-shaped profiles are bent in the middle of the wall height at an angle of 90 ° and are paired with each other due to the bends of the stamped pins mutually entering into the formed holes from the stamping.

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