A triangular steel bar truss lower chord free floor support plate

Abstract

The utility model discloses a kind of floor deck of triangular steel bar truss without lower chord reinforcement, it relates to building engineering technical field, to solve the problem of large amount of steel bar of existing steel bar truss, its technical scheme main points include upper chord main reinforcement, web bar, web bar foot connecting tendon, concrete bottom plate, the web bar has two, by mechanical processing into wave shape shape, the wave peak inner side surface welding in the left and right two sides of upper chord main reinforcement of two web bars, the wave peak of web bar is flush with upper chord main reinforcement, two web bars are inclined to form a certain angle triangle from main reinforcement end to outside, the wave shape structure of the web bar of the two sides below upper chord main reinforcement is symmetrically arranged. Cancel the lower chord reinforcement of steel bar truss in prior art, save the amount of steel bar, high-performance concrete is used to concrete bottom plate, the thickness of concrete bottom plate can be reduced, the overall weight of steel bar truss floor deck is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a floor deck with a triangular steel truss without a bottom chord. Background Technology

[0002] A reinforced steel truss floor deck is a type of building product where the reinforcing steel bars in a floor slab are welded into a steel truss in a factory, and then the steel truss is fixedly connected to the bottom formwork to form an integrated structure of the bottom formwork and reinforcing steel bars. The main reinforcing steel bars in a reinforced steel truss floor deck consist of one top chord, two bottom chords, and two web members, which are then connected by welding to form a truss. One method is to weld the truss to the base slab to form a single composite load-bearing slab; another method is to cast the truss to a concrete base formwork to form a single composite load-bearing slab.

[0003] A steel truss typically consists of one top chord, two web bars, and two bottom chords welded together to form a triangular steel truss. When pouring concrete floor slabs, the design spacing of the reinforcing bars is generally 150mm-200mm, double-layered and bidirectional. However, in traditional floor slabs, the spacing between two adjacent top chord bars is approximately 200mm, and the average spacing between two adjacent bottom chord bars is 100mm. When the design spacing is 150mm, double-layered and bidirectional, traditional floor slabs cannot meet the design requirements for floor slab reinforcement. In practice, an additional reinforcing bar must be added at the top, resulting in a 100mm spacing, double-layered and bidirectional, which increases the amount of steel used and the cost. Utility Model Content

[0004] The purpose of this invention is to provide a floor deck with a triangular steel truss without a bottom chord reinforcement that can reduce costs while ensuring strength.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A floor deck with a triangular steel truss and no bottom chord reinforcement includes a top chord main reinforcement, web reinforcement, web bottom connecting reinforcement, and a concrete base slab. The web reinforcement consists of two bars, machined into a wavy shape. The inner sides of the crests of the two web reinforcement bars are welded to the left and right sides of the top chord main reinforcement. The crests of the web reinforcement bars are flush with the top chord main reinforcement. The two web reinforcement bars slope outwards from the ends of the main reinforcement bars to form a triangle at a certain angle. The wavy web reinforcement bars on both sides below the top chord main reinforcement are symmetrically arranged. The two web reinforcement bars are cold-drawn steel wires of a predetermined diameter.

[0007] Furthermore, the upper chord main reinforcement is a straight threaded steel bar.

[0008] Furthermore, the troughs of the web tendons form two types of feet: one is a straight foot, and the other is a bent foot.

[0009] Furthermore, the bottom connecting bar of the web member is a galvanized cold-drawn steel wire of a set diameter. There are two bottom connecting bars of the web member, which are respectively set at the bottom of the wavy web member on both sides and welded at a certain distance from the bottom. They connect each adjacent web member trough on the side of the upper chord main bar into a line.

[0010] Furthermore, the interior of the concrete base slab contains a fiber mesh, which is a type of inorganic material woven with a certain square hole size. It is placed below the troughs of the web reinforcement and covers the entire bottom of the slab. The mesh is embedded in the concrete base slab during casting and has the function of enhancing tensile strength and crack resistance.

[0011] Furthermore, the concrete base slab is a high-performance concrete prepared by mixing fine stone concrete with a certain amount of ribbed fiber and thoroughly mixing it. The thin concrete base slab prepared by molding is enhanced with tensile and crack resistance. The concrete base slab is located at the trough of the web reinforcement. During pouring, the fiber mesh, the trough foot of the double web reinforcement and the connecting bar at the bottom of the web reinforcement are poured into one piece. After curing and demolding, a triangular steel truss floor deck without bottom chord reinforcement is obtained.

[0012] In summary, the beneficial technical effects of this utility model are as follows:

[0013] This invention changes the existing triangular steel truss from having two bottom chords to having no bottom chords, which can meet various steel reinforcement spacing requirements for floor slab design, saving steel reinforcement usage. The resulting triangular steel truss floor slab without bottom chords will not crack during construction and use because the concrete base slab uses high-performance concrete and is reinforced with mesh. The thinner concrete base slab significantly reduces the overall weight of the steel truss floor slab, reducing transportation and hoisting costs, and achieving the goal of energy conservation and emission reduction. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is the front view of the present invention;

[0016] Figure 3 This is a side view of the present invention.

[0017] In the diagram: 1. Top chord main reinforcement; 2. Web reinforcement; 3. Web bottom connecting reinforcement; 4. Concrete base slab. Detailed Implementation

[0018] The method of this utility model will be further described in detail below with reference to the accompanying drawings.

[0019] Reference Figure 1 , Figure 2 , Figure 3A floor deck with a triangular steel truss and no bottom chord reinforcement includes an upper chord main reinforcement 1, web reinforcement 2, web bottom connecting reinforcement 3, and a concrete base slab 4. There are two web reinforcements 2, which are machined into a wave shape. The inner sides of the crests of the two web reinforcements 2 are welded to the left and right sides of the upper chord main reinforcement 1. The crests of the web reinforcements 2 are flush with the upper chord main reinforcement 1. The two web reinforcements 2 are inclined outward from the end of the main reinforcement to form a triangle at a certain angle. The wave-shaped web reinforcements 2 on both sides below the upper chord main reinforcement 1 are symmetrically arranged. The two web reinforcements 2 are cold-drawn steel wires of a set diameter. The upper chord main reinforcement 1 is a straight threaded steel bar.

[0020] There are two types of feet formed by the troughs of the web tendon 2: one is a straight foot, and the other is a bent foot.

[0021] The bottom connecting rib 3 of the web member is a galvanized cold-drawn steel wire of a set diameter. There are two bottom connecting ribs 3 of the web member, which are respectively set at the bottom of the wavy web member rib 2 on both sides and welded at a certain distance from the bottom foot. They connect each adjacent web member trough on one side of the upper chord main rib 1 into a line. When the foot formed by the trough of the web member rib 2 is a bent foot, the bottom connecting rib 3 of the web member is welded above the bent foot.

[0022] The bottom connecting bar 3 of the web member is a galvanized cold-drawn steel wire of a set diameter, which solves the problem of steel corrosion caused by insufficient protective layer of steel bars in the concrete base slab 4.

[0023] Fiber mesh is a type of mesh woven from inorganic materials with a certain square hole size. It is placed below the trough of the web reinforcement 2 and covers the entire bottom of the slab. When it is cast, it is embedded in the concrete base slab 4 and has the function of enhancing tensile strength and crack resistance.

[0024] The fiber mesh is made of glass fiber, basalt fiber or carbon fiber, and its tensile strength is required to be no less than 60KN.

[0025] The concrete base plate 4 is a high-performance concrete prepared by mixing fine stone concrete with a certain amount of ribbed fiber and then thoroughly mixing it. The thin concrete base plate 4 prepared by molding is enhanced with tensile and crack resistance.

[0026] The thickness of the concrete base slab 4 is 18mm-25mm;

[0027] The concrete base slab 4 is located at the trough of the web reinforcement 2. During the pouring process, the fiber mesh, the trough foot of the double web reinforcement 2 and the connecting bar 3 at the bottom foot of the web reinforcement are poured into one piece. After curing and demolding, the triangular steel truss floor deck without bottom chord reinforcement is obtained.

[0028] The triangular steel truss floor deck without bottom chord reinforcement prepared can be arranged according to the spacing of the design drawings. At least one triangular steel truss without bottom chord reinforcement is required for the prepared floor deck.

[0029] The specific real-time examples described herein are preferred real-time examples of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A triangular steel bar truss bottom chordless floor support plate, comprising top chord main bars (1), web bar bars (2), web bar foot connecting bars (3), and concrete bottom plates (4), characterized in that: There are two web bars (2), which are machined into a wave shape. The inner side of the crest of the two web bars (2) is welded to the left and right sides of the upper chord main bar. The crest of the web bars (2) is flush with the upper chord main bar (1). The two web bars (2) are inclined outward from the end of the main bar to form a triangle at a certain angle. The web bars (2) with the wave-shaped structure on both sides below the upper chord main bar (1) are symmetrically arranged. The two web bars (2) are cold-drawn steel wires with a set diameter.

2. The triangular steel bar truss non-bottom chord floor deck according to claim 1, characterized in that: The upper chord main reinforcement (1) is a straight threaded steel bar.

3. The triangular steel bar truss non-bottom chord floor deck according to claim 1, characterized in that: The troughs of the web bar (2) form two types of feet: one is a straight foot, and the other is a bent foot.

4. The triangular steel bar truss non-bottom chord floor deck according to claim 1, characterized in that: The bottom connecting bar (3) of the web member is a galvanized cold-drawn steel wire of a set diameter. There are two bottom connecting bars (3), which are respectively set at the bottom of the wavy web member (2) on both sides and welded at a certain distance from the bottom. They connect each adjacent web member trough on one side of the upper chord main bar (1) into a line.

5. The triangular steel bar truss non-bottom chord floor deck according to claim 1, characterized in that: The concrete base plate (4) contains a fiber mesh inside. The fiber mesh is made of inorganic material woven with a certain square hole size. It is placed below the trough of the web reinforcement and covers the entire bottom of the plate. The mesh is embedded in the concrete base plate during casting and has the function of enhancing tensile strength and crack resistance.

6. A triangular steel bar truss floor deck without lower chord bars according to claim 5, characterized in that: The concrete base plate (4) is a high-performance concrete prepared by mixing fine stone concrete with a certain amount of ribbed fiber and fully mixing it. The thin concrete base plate prepared by molding is a concrete base plate with enhanced tensile and crack resistance. The concrete base plate (4) is located at the trough of the web reinforcement (2). During the pouring, the fiber mesh, the trough foot of the double web reinforcement (2) and the web bottom foot connecting reinforcement (3) are poured into one piece. After curing and demolding, a triangular steel truss floor deck without bottom chord reinforcement is obtained.

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