Steel bar truss floor support plate with multiple upper chord bars

Abstract

The steel bar truss floor support plate comprises trusses and a bottom plate, and the multiple trusses are arranged on the surface of the bottom plate; each truss comprises two upper chord ribs, the two upper chord ribs are welded and connected through a plurality of connecting pieces, and the distance between the two upper chord ribs is smaller than the distance between the two lower chord ribs, so that the vertical sections of the trusses are trapezoidal; through the design of the two upper chord ribs, the section of the truss is trapezoidal, the section centroid and the section inertia moment are improved, and therefore the bending rigidity of the truss is improved. The upper chord of the double steel bars is convenient to fall, and the efficiency of on-board operation can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a steel bar truss floor deck with multiple upper chord bars. Background Art

[0002] The reinforced steel truss floor deck is a mature and excellent building material product. Its cross section is a triangular truss, but because there is only one upper chord, it is difficult to walk on the board, the construction efficiency is low, and the neutral axis of the cross section is biased downward, the overall cross-section bending stiffness is low, and the material utilization is not sufficient. Summary of the invention

[0003] The purpose of the present invention is to provide a steel truss floor deck with multiple upper chords to solve the problems of low efficiency of construction work on the deck and low bending rigidity of the overall section.

[0004] To achieve the above-mentioned purpose, the present invention proposes a steel truss floor deck with multiple upper chords, including a truss and a base plate, wherein multiple trusses are arranged on the surface of the base plate; each truss includes two upper chords, and the two upper chords are welded and connected by multiple connecting pieces.

[0005] Furthermore, the connecting piece is a steel bar, a steel pipe or a steel strip.

[0006] Furthermore, the two upper chord bars are arranged in parallel.

[0007] Furthermore, the truss also includes two lower chords and web reinforcement; the web reinforcement is welded between the two lower chords and the corresponding upper chords.

[0008] Furthermore, the web reinforcement is placed between the upper chord reinforcement and the lower chord reinforcement in a wave shape; the end of the web reinforcement passes around the connecting piece and is welded and fixed to the connecting piece; after the bottom of the web reinforcement is welded to the lower chord reinforcement, it is bent outward to form a support foot, and the support foot is welded and fixed to the base plate.

[0009] Furthermore, the spacing between the two upper chords is smaller than the spacing between the two lower chords, so that the vertical cross-section of the truss is trapezoidal.

[0010] Compared with the prior art, the advantages of the present invention are: the present invention, by providing two upper chord bars, makes the truss with a triangular cross section become a trapezoidal cross section, improves the cross section centroid and the cross section moment of inertia, thereby improving the bending rigidity of the truss. The upper chord of the double steel bar is convenient for footing, which can improve the efficiency of working on the board. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of a steel truss floor deck with multiple upper chords in an embodiment of the present invention, in which the connecting parts are round steel pipes.

[0012] Figure 2This is a schematic diagram of a truss floor deck structure in which the connecting member 2 is a steel bar in an embodiment of the present invention;

[0013] Figure 3 This is a schematic diagram of the structure of a truss floor deck in which the connecting member 2 is a steel tie rod in an embodiment of the present invention;

[0014] Figure 4 It is a schematic diagram of the structure of a truss floor deck in which the connecting member 2 is a steel bar with a bent hook in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] 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.

[0016] The present invention proposes a steel truss floor deck with multiple upper chords, comprising a truss and a bottom plate 11, wherein a plurality of trusses are arranged on the surface of the bottom plate 11; each truss comprises two upper chords 14, two lower chords 12 and a web 13; the two upper chords 14 are welded and connected by a plurality of connectors 2, and the web 13 is welded between the two lower chords 12 and the corresponding upper chords 14. The web 13 is arranged between the upper chord 14 and the lower chord 12 in a wavy shape; the end of the web 13 bypasses the connector 2 and is welded and fixed to the connector 2; after the bottom of the web 13 is welded to the lower chord 12, it is bent outward to form a support foot, and the support foot is welded and fixed to the bottom plate 11.

[0017] In this embodiment, the spacing between the two upper chord bars 14 is smaller than the spacing between the two lower chord bars 12, so that the vertical cross section of the truss is trapezoidal, the cross section centroid and the cross section moment of inertia are increased, thereby increasing the bending stiffness of the truss. The upper chord of the double steel bar is convenient for footing and can improve the efficiency of the board operation.

[0018] In order to increase the practicability of the present invention and thus apply it to the actual conditions of various construction sites, the connecting member 2 can be used as follows: Figure 1 The steel pipe shown, Figure 2 The steel bars shown, Figure 3 As shown in the figure, it is made of steel rods. Figure 4 As shown, when the connecting member 2 is made of steel bars, the ends of the steel bars can be bent into a hook shape to facilitate positioning and fixing the upper chord 14, making the overall structure of the truss more solid.

[0019] 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 steel truss floor deck with multiple upper chords, characterized in that: It comprises a truss and a bottom plate, wherein a plurality of trusses are arranged on the surface of the bottom plate; each of the trusses comprises two upper chord bars, and the two upper chord bars are welded and connected via a plurality of connectors.

2. The steel truss floor deck with multiple upper chords according to claim 1, characterized in that: The connecting piece is a steel bar, a steel pipe or a steel strip.

3. The steel truss floor deck with multiple upper chords according to claim 1, characterized in that: The two upper chord bars are arranged in parallel.

4. The steel truss floor deck with multiple upper chords according to claim 1, characterized in that: The truss further comprises two lower chords and web reinforcements; the web reinforcements are welded between the two lower chords and the corresponding upper chords.

5. The steel truss floor deck with multiple upper chords according to claim 4, characterized in that: The web reinforcement is arranged in a wave shape between the upper chord reinforcement and the lower chord reinforcement; the end of the web reinforcement bypasses the connecting piece and is welded and fixed to the connecting piece; after the bottom of the web reinforcement is welded to the lower chord reinforcement, it is bent outward to form a supporting foot, and the supporting foot is welded and fixed to the bottom plate.

6. The steel truss floor deck with multiple upper chords according to claim 4, characterized in that: The distance between the two upper chord bars is smaller than the distance between the two lower chord bars, so that the vertical cross-section of the truss is trapezoidal.

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