A kind of carapace column beamless floor node

Abstract

The present invention proposes a shell column beamless floor node, including a shell column body, a shear member and a reinforced concrete floor; the four walls of the shell column body are provided with windows in the same plane; the steel bars of the reinforced concrete floor run through the window, and a plurality of shear members are arranged on the shell column body at the side edge of the window, and the shear members are buried in the reinforced concrete floor after pouring by pouring concrete on the steel bars; and also includes a column cap, which is located below the reinforced concrete floor, and in the pouring stage of the reinforced concrete floor, the column cap and the reinforced concrete floor are poured into the cavity of the column cap to realize the integrated pouring between the column cap and the reinforced concrete floor. The present invention forms an integral body by arranging shear members, prefabricated steel plate column caps and other connectors, and has better force-bearing performance in terms of bending resistance, shear resistance, punching shear resistance and other aspects of the node domain. In addition, the present invention allows the construction joints of two concretes of different strengths to remain within the range of the column cap, and avoids the punching shear position occurring at the construction joint.

Description

Technical Field

[0001] The invention relates to the technical field of carapace columns and beams, in particular to a carapace column beamless floor node. Background Art

[0002] The Carapace Column is a composite structural column developed by Ouben Steel Structure. The steel pipes at the four corners are similar to the "longitudinal reinforcement" of reinforced concrete columns, and the corrugated plates between the steel pipes are similar to the "hoops" of reinforced concrete columns; its node parts are convenient for connecting with horizontal components such as beams and plates, which can not only penetrate steel plates and steel bars, but also facilitate the continuous pouring of concrete.

[0003] For apartment buildings, office buildings, parking garages, cold storage and other buildings, beamless floors are an optional structural form that can save floor height. They are widely used in Europe, America and Southeast Asia, and are also widely used in my country, especially in slab-column-seismic wall structure projects in low-intensity areas. However, there are many engineering accidents every year in projects with cast-in-place columns and beamless floors, especially in basement roofs; a large part of the causes of the accidents are shear and punching damage at the junction of the column top and the floor slab; this is also related to the inconsistency of the concrete grades of the columns and floor slabs, and the problems caused by the construction gaps. In order to solve the above problems, Ouben has developed the structure and design methods of shell columns and beamless floors. Summary of the invention

[0004] The purpose of the present invention is to provide a shell column beamless floor node which has strong self-rigidity and has strong bending, shear and punching resistance performance.

[0005] To achieve the above-mentioned purpose, the present invention proposes a carapace column beamless floor node, comprising a carapace column body, shear members and a reinforced concrete floor slab; the four walls of the carapace column body are provided with windows in the same plane; the steel bars of the reinforced concrete floor slab pass through the windows, and a plurality of shear members are arranged on the carapace column body at the side edge of the window, and by pouring concrete on the steel bars, the shear members are buried in the poured reinforced concrete floor slab.

[0006] Furthermore, it also includes a column cap, which is a prefabricated steel sheet metal column cap, and the column cap is sleeved on the outer periphery of the shell column body, and the inner wall of the column cap is connected to the corner steel pipe of the shell column body through a tie plate;

[0007] The column cap is located below the reinforced concrete floor slab to support the reinforced concrete floor slab. During the pouring stage of the reinforced concrete floor slab, the column cap and the reinforced concrete floor slab are integrally poured by simultaneously pouring concrete into the cavity of the column cap.

[0008] Furthermore, the column cap is in the shape of a rectangle or an inverted square pyramid.

[0009] Furthermore, a support platform is prefabricated between the overlapping surface of the column cap and the reinforced concrete floor slab, and the support platform is cast integrally with the reinforced concrete floor slab and the column cap.

[0010] Furthermore, at each window position, a plurality of parallel tie bars are preset between two adjacent corner steel pipes, and after the steel bars pass through the window, they are overlapped on the tie bars.

[0011] Compared with the prior art, the advantages of the present invention are that the carapace column itself has good rigidity and can be used as a column of the floor formwork support system when the floor is supported, thereby playing a lateral stabilizing role and improving the safety during the construction of the beamless floor.

[0012] The carapace columns and floor slabs are integrated through connecting parts such as through-steel bars, shear members, and prefabricated steel plate column caps. Compared with the traditional method of fully cast-in-place slab columns, it has better stress-bearing performance in terms of bending, shear, and punching resistance in the node domain.

[0013] Usually, the strength grade of column concrete is higher than that of floor slab. The present invention allows the construction joint of two concretes with different strengths to remain within the column cap range, thereby avoiding the punching position from occurring at the construction joint.

[0014] The design of the column cap provides a certain support effect for the reinforced concrete floor slab, and provides a reinforcement effect for the connection node between the reinforced concrete floor slab and the shell column, which has better earthquake resistance and shear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the connection structure of the carapace column, the floor slab and the shear member in the embodiment of the present invention;

[0016] Figure 2 Schematic diagram of the connection structure of the carapace column, the floor slab and the column cap in the embodiment of the present invention;

[0017] Figure 3 A top view of the connection between the carapace column, the floor slab and the column cap in an embodiment of the present invention;

[0018] Figure 4 Schematic diagram of the structure of various column caps in the embodiments of the present invention; DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below.

[0020] like Figure 1As shown, the present invention proposes a shell column beamless floor node, including a shell column body 1, a shear member 2 and a reinforced concrete floor slab 3; the four walls of the shell column body 1 are provided with windows in the same plane; the steel bars 4 of the reinforced concrete floor slab 3 pass through the windows, and a plurality of shear members 2 are arranged on the shell column body 1 at the side edge of the window, and by pouring concrete on the steel bars 4, the shear members 2 are buried in the poured reinforced concrete floor slab 3. The shear members 2 are generally cylindrical studs, and can also be steel sections or ordinary steel bars 4. The shear members 2 fully enhance the bending and shearing performance of the shell column beamless floor node.

[0021] The carapace column itself has good rigidity. When the floor slab 3 is supported, it can be used as a column of the floor slab 3 formwork support system, play a lateral stabilization role, and improve the safety during the construction of the beamless floor.

[0022] At each window position, a plurality of parallel tie bars 8 are preset between two adjacent corner steel pipes, and after the steel bar 4 passes through the window, it is overlapped on the tie bars 8. The tie bars 8 provide support for the upper and lower arrangement of the steel bars 4, making the positioning of the steel bars 4 more accurate and convenient.

[0023] In this embodiment, if Figure 2 and Figure 3 As shown, when the shear resistance and punching resistance of the floor slab 3 do not meet the design requirements, a column cap 5 can be set. The column cap 5 is a prefabricated steel sheet metal column cap 5. The column cap 5 is sleeved on the outer periphery of the shell column body 1. The inner wall of the column cap 5 is connected to the corner steel pipe of the shell column body 1 through a tie plate 6; the contact points between the steel plate column cap 5 itself and the shell column body 1 can be fixed by welding.

[0024] The column cap 5 is located below the reinforced concrete floor 3 to support the reinforced concrete floor 3. During the pouring stage of the reinforced concrete floor 3, concrete is poured into the cavity of the column cap 5 simultaneously to achieve integrated pouring between the column cap 5 and the reinforced concrete floor 3.

[0025] Usually, the strength grade of the column concrete is higher than that of the floor 3. The present invention allows the construction joint of the two concretes of different strengths to be kept within the range of the column cap 5, thereby avoiding the punching position from occurring at the construction joint. The design of the column cap 5 provides a certain support effect for the reinforced concrete floor 3, and provides a reinforcement effect for the connection node between the reinforced concrete floor 3 and the shell column, thereby improving the earthquake resistance and punching resistance, thereby improving the overall bending resistance, shear resistance, and punching resistance performance.

[0026] In this embodiment, if Figure 4 As shown, the column cap 5 is in the shape of a rectangle or an inverted square pyramid. A support platform 7 is prefabricated between the overlapped surface of the column cap 5 and the reinforced concrete floor slab 3, and the support platform 7 is integrally cast with the reinforced concrete floor slab 3 and the column cap 5. The support platform 7 can make it more convenient to support the column cap 5 and the floor slab 3.

[0027] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A shell column beamless floor node, characterized in that: It comprises a carapace column body, a shear member and a reinforced concrete floor slab; the four walls of the carapace column body are provided with windows in the same plane; the steel bars of the reinforced concrete floor slab pass through the windows, a plurality of the shear members are arranged on the carapace column body at the side edge of the windows, and concrete is poured on the steel bars so that the shear members are buried in the poured reinforced concrete floor slab; It also includes a column cap, which is a prefabricated steel plate gold column cap, which is sleeved on the outer periphery of the shell column body, and the inner wall of the column cap is connected to the corner steel pipe of the shell column body through a tie plate; The column cap is located below the reinforced concrete floor slab to support the reinforced concrete floor slab. During the pouring stage of the reinforced concrete floor slab, the column cap and the reinforced concrete floor slab are integrally poured by pouring concrete into the cavity of the column cap simultaneously. A support platform is prefabricated between the overlapped surface of the column cap and the reinforced concrete floor slab, and the support platform is cast integrally with the reinforced concrete floor slab and the column cap.

2. The carapace column beamless floor node according to claim 1, characterized in that: The column cap is in the shape of a rectangle or an inverted square pyramid.

3. The carapace column beamless floor node according to claim 1, characterized in that: At each window position, a plurality of parallel tie bars are preset between two adjacent corner steel pipes. After the steel bars penetrate through the window, they are overlapped on the tie bars.

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