Plate descending node connecting structure of steel truss floor support plate

Abstract

The utility model relates to a descending plate node connecting structure of a steel truss floor support plate, which comprises an I-shaped steel beam, floor support plates are respectively paved on two sides of the steel beam, the floor support plates on two sides of the steel beam are respectively a first floor support plate and a second floor support plate, an upper beam plate is arranged on the top surface of the steel beam, and the end part of the first floor support plate is lapped on the upper surface of the upper beam plate. A Z-shaped butt strap is arranged on the side, facing the second floor support plate, of the upper beam plate, an upper plate of the Z-shaped butt strap is erected on one side of the upper surface of the upper beam plate, and the end of the second floor support plate is erected on a lower plate of the Z-shaped butt strap. The first floor support plate and the second floor support plate are connected and fixed through the three connecting ribs at the positions of the descending plate nodes with the floor support plates on the two sides not equal in height, the descending plate nodes can be effectively connected, and structural safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure buildings, in particular to a floor construction structure of a steel structure building, and in particular to a drop-plate node connection structure of a steel truss floor deck. Background Art

[0002] The frame components of the steel structure can be prefabricated in the factory and then assembled on site. The construction speed is fast and the construction period is short. It is especially suitable for the construction requirements of large venues and factories. After the column and beam frame structure of the steel structure building is erected, the floor decking needs to be laid, and then the floor slab is poured on the floor decking. The floor decking includes a bottom plate, and a number of groups of steel trusses for support are arranged in parallel above the bottom plate. After the floor slab is poured, the floor decking directly serves as the supporting skeleton of the floor slab, and the construction efficiency is high. Since the steel trusses of the floor decking directly serve as the skeleton of the floor slab, when the floor decking is laid, it is necessary to add reinforcement on site between the steel trusses to meet the requirements of the criss-crossing steel structure and the structural strength in all directions. At the joints of the floor slabs laid in different directions, the connection mechanism between the floor decking is particularly critical, especially when there is a height difference between the floor slabs in two directions, which is generally called a drop-plate node. The floor decking connection structure at the drop-plate node needs to ensure structural safety. Utility Model Content

[0003] The utility model aims to solve the problem that the connection structure of the reinforced floor deck is particularly critical to the node strength at the drop-down node where the floor slabs of a steel structure building are connected, and to provide a drop-down node connection structure for a steel truss floor deck to ensure the connection strength of the plates between adjacent floor slabs and ensure structural safety.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a descending plate node connection structure of a steel truss floor deck, comprising an I-shaped steel beam, floor decks are laid on both sides of the steel beam, the floor decks on both sides of the steel beam are respectively a first floor deck and a second floor deck, the top surface of the steel beam is provided with an upper beam plate, the end of the first floor deck is laid on the upper surface of the upper beam plate, a Z-shaped slat is arranged on one side of the upper beam plate toward the second floor deck, the upper surface of the Z-shaped slat is laid on one side of the upper surface of the upper beam plate, and the end of the second floor deck is laid on the lower plate of the Z-shaped slat;

[0005] The floor decking plate includes a bottom plate and a plurality of steel trusses, wherein the lower portion of the steel trusses is provided with mutually staggered lower reinforcements, and the lower reinforcements are respectively lower longitudinal reinforcements and lower transverse reinforcements, and the upper portion of the steel trusses is provided with mutually staggered upper reinforcements, and the upper reinforcements are respectively upper longitudinal reinforcements and upper transverse reinforcements, the first floor decking plate is higher than the second floor decking plate, and the height difference between the first floor decking plate and the second floor decking plate does not exceed the self-height of the first floor decking plate or the second floor decking plate, a first connecting rib is provided between the upper reinforcement of the first floor decking plate and the lower reinforcement of the second floor decking plate, a second connecting rib is provided between the lower reinforcement of the first floor decking plate and the lower reinforcement of the second floor decking plate, and a third connecting rib is provided on the upper reinforcement of the second floor decking plate extending toward one side of the first floor decking plate.

[0006] In this structure, the steel trusses of the floor deck are reinforced with double layers of longitudinal and transverse reinforcement to ensure that the floor deck has sufficient reinforcement strength after the floor slab is cast. At the drop-down nodes of the floor decks on both sides with different heights, three connecting bars are used to connect and fix the first floor deck and the second floor deck, which can effectively connect the drop-down nodes and ensure the safety of the structure.

[0007] Preferably, the upper and lower ends of the first and third connecting bars are horizontal, and the middle sections are inclined. The upper end of the first connecting bar is bent downward, and the lower end is bent upward. The upper and lower ends of the second connecting bar are both bent upward. The end of the third connecting bar facing the first floor deck is bent downward and welded to the bent section of the upper end of the second connecting bar. The three connecting bars form a connection and fixation of the upper, middle and lower layers, which can effectively ensure the structural strength of the drop-plate node.

[0008] Preferably, the steel trusses of the first floor decking plate and the second floor decking plate are perpendicular to the steel beams, the upper section of the first connecting rib is welded to the upper longitudinal reinforcement of the first floor decking plate, and the lower section of the first connecting rib is welded to the lower longitudinal reinforcement of the second floor decking plate; the upper section of the second connecting rib is welded to the lower longitudinal reinforcement of the first floor decking plate, and the lower section of the second connecting rib is welded to the lower longitudinal reinforcement of the second floor decking plate; the third connecting rib is welded to the upper longitudinal reinforcement of the second floor decking plate.

[0009] Preferably, the steel trusses of the first floor decking plate are perpendicular to the steel beams, the steel trusses of the second floor decking plate are parallel to the steel beams, the upper section of the first connecting rib is welded to the upper longitudinal reinforcement of the first floor decking plate, and the lower section of the first connecting rib is welded to the lower transverse reinforcement of the second floor decking plate; the upper section of the second connecting rib is welded to the lower longitudinal reinforcement of the first floor decking plate, and the lower section of the second connecting rib is an integral extension of the lower transverse reinforcement of the second floor decking plate; the third connecting rib is welded to the upper transverse reinforcement of the second floor decking plate.

[0010] Preferably, the width of the upper plate and the lower plate of the Z-shaped buttress plate is not less than 60 mm.

[0011] Preferably, the lap length of the first connecting reinforcement on both sides of the steel beam is not less than 800 mm; the lap length of the second connecting reinforcement on both sides of the steel beam is not less than 400 mm.

[0012] Preferably, the steel truss of the floor decking plate includes an upper chord steel bar and two lower chord steel bars, the upper chord steel bars and the lower chord steel bars are distributed in a herringbone shape, and wavy web steel bars are provided between the two side walls of the upper chord steel bar and the inner walls of the two lower chord steel bars, and the web steel bars are fixed to the base plate after being horizontally bent at the trough.

[0013] Preferably, the upper transverse reinforcement is perpendicular to the upper chord steel bars and horizontally laid and fixed between each upper chord steel bars, and the lower transverse reinforcement is perpendicular to the lower chord steel bars and horizontally laid and fixed between each lower chord steel bars; the upper longitudinal reinforcement is parallel to the upper chord steel bars and fixedly laid between each upper transverse reinforcement, and the lower longitudinal reinforcement is parallel to the lower chord steel bars and fixedly laid between each lower transverse reinforcement.

[0014] Preferably, an upper longitudinal reinforcement and a lower longitudinal reinforcement are arranged between adjacent steel trusses, and an upper transverse reinforcement and a lower transverse reinforcement are arranged between adjacent wave crests of the web member reinforcement.

[0015] The utility model adopts three connecting ribs to connect and fix the first floor decking plate and the second floor decking plate at the drop-down plate node where the floor decking plates on both sides are of unequal heights, which can effectively connect the drop-down plate node and ensure the safety of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic end view of the initial structure of a floor deck.

[0018] Figure 2 It is a side view schematic diagram of the initial structure of a floor deck.

[0019] Figure 3 It is a schematic diagram of the end face of the reinforced structure of a floor deck.

[0020] Figure 4 It is a side view schematic diagram of the reinforced structure of a floor deck.

[0021] Figure 5 This is the first structural schematic diagram of the utility model.

[0022] Figure 6 The utility model Figure 5 Schematic diagram of the connecting reinforcement structure of the structure.

[0023] Figure 7 The utility model Figure 5 Schematic diagram of the Z-type slab structure of the structure.

[0024] Figure 8 It is a second structural schematic diagram of the utility model.

[0025] Fig. 9 The utility model Figure 8 Schematic diagram of the connecting reinforcement structure of the structure.

[0026] In the figure: 1, bottom plate, 2, upper chord steel bars, 3, lower chord steel bars, 4, web bar steel bars, 5, upper transverse reinforcement, 6, lower transverse reinforcement, 7, upper longitudinal reinforcement, 8, lower longitudinal reinforcement, 9, steel beam, 10, upper beam plate, 11, Z-shaped lap plate, 12, first floor decking, 13, second floor decking, 14, first connecting reinforcement, 15, second connecting reinforcement, 16, third connecting reinforcement. DETAILED DESCRIPTION

[0027] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings.

[0028] Example 1: A drop-down node connection structure of a steel truss floor deck, such as Figure 5-7 As shown. This structure includes an I-shaped steel beam 9, and floor decks are laid on both sides of the steel beam. The floor decks on both sides of the steel beam are respectively the first floor deck 12 and the second floor deck 13. The top surface of the steel beam is provided with an upper beam plate 10, and the end of the first floor deck 12 is laid on the upper surface of the upper beam plate 10. A Z-shaped slat 11 is provided on the side of the upper beam plate facing the second floor deck 13. The upper surface of the Z-shaped slat is laid on one side of the upper surface of the upper beam plate 10, and the end of the second floor deck 13 is laid on the lower plate of the Z-shaped slat. The width of the upper plate and the lower plate of the Z-shaped slat is not less than 60mm.

[0029] The initial structure of the floor deck is as follows Figure 1 , 2 As shown, the floor deck includes a base plate 1 and a plurality of steel trusses. The steel trusses include an upper chord steel bar 2 and two lower chord steel bars 3. The upper chord steel bars and the lower chord steel bars are distributed in a herringbone shape. A wavy web steel bar 4 is provided between the two side walls of the upper chord steel bar and the inner side walls of the two lower chord steel bars. The web steel bars are fixed to the base plate 1 after being horizontally bent at the trough.

[0030] The reinforced structure of the floor deck is as follows Figure 3 , 4As shown, the lower part of the floor deck steel truss is provided with mutually staggered lower reinforcements, and the lower reinforcements are respectively lower longitudinal reinforcements 8 and lower transverse reinforcements 6. The upper part of the steel truss is provided with mutually staggered upper reinforcements, and the upper reinforcements are respectively upper longitudinal reinforcements 7 and upper transverse reinforcements 5. The upper transverse reinforcements 5 are perpendicular to the upper chord steel bars 2 and horizontally laid between each upper chord steel bars 2 and fixed, and the lower transverse reinforcements 6 are perpendicular to the lower chord steel bars 3 and horizontally laid between each lower chord steel bars 3 and fixed; the upper longitudinal reinforcements 7 are parallel to the upper chord steel bars and fixedly laid between each upper transverse reinforcement 5, and the lower longitudinal reinforcements 8 are parallel to the lower chord steel bars and fixedly laid between each lower transverse reinforcement 6. An upper longitudinal reinforcement 7 and a lower longitudinal reinforcement 8 are arranged between adjacent steel trusses, and an upper transverse reinforcement 5 and a lower transverse reinforcement 6 are arranged between adjacent wave crests of the web bar steel bars.

[0031] like Figure 5 , 6 As shown in Figures 7 and 8, the first floor deck 12 is higher than the second floor deck 13, and the height difference between the first floor deck and the second floor deck does not exceed the height of the first floor deck or the second floor deck. A first connecting rib 14 is provided between the upper reinforcement of the first floor deck and the lower reinforcement of the second floor deck, a second connecting rib 15 is provided between the lower reinforcement of the first floor deck and the lower reinforcement of the second floor deck, and a third connecting rib 16 is provided on the upper reinforcement of the second floor deck extending toward one side of the first floor deck. The upper and lower ends of the first and third connecting ribs are horizontal, and the middle sections are inclined. The upper end of the first connecting rib is provided with a downward bend, and the lower end is provided with an upward bend; the upper and lower ends of the second connecting rib are both provided with an upward bend, and the third connecting rib is bent downward toward one end of the first floor deck and welded to the upper bending section of the second connecting rib. The lap length of the first connecting rib on both sides of the steel beam is not less than 800 mm; the lap length of the second connecting rib on both sides of the steel beam is not less than 400 mm.

[0032] like Figure 5 , 6 As shown, the steel trusses of the first floor decking 12 and the second floor decking 13 are perpendicular to the steel beam 9, the upper section of the first connecting rib 14 is welded to the upper longitudinal reinforcement 7 of the first floor decking 12, and the lower section of the first connecting rib 14 is welded to the lower longitudinal reinforcement 8 of the second floor decking 13; the upper section of the second connecting rib 15 is welded to the lower longitudinal reinforcement 8 of the first floor decking, and the lower section of the second connecting rib is welded to the lower longitudinal reinforcement of the second floor decking; the third connecting rib 16 is welded to the upper longitudinal reinforcement 7 of the second floor decking.

[0033] Embodiment 2: A drop-down node connection structure of a steel truss floor deck, such as Figure 8 , 9In this example, the steel truss of the first floor deck 12 is perpendicular to the steel beam 9, the steel truss of the second floor deck 13 is parallel to the steel beam 9, the upper section of the first connecting rib 14 is welded to the upper longitudinal reinforcement 7 of the first floor deck 12, and the lower section of the first connecting rib is welded to the lower transverse reinforcement 6 of the second floor deck 13; the upper section of the second connecting rib 15 is welded to the lower longitudinal reinforcement 8 of the first floor deck 12, and the lower section of the second connecting rib is an integral extension of the lower transverse reinforcement 6 of the second floor deck 13; the third connecting rib 16 is welded to the upper transverse reinforcement 5 of the second floor deck 13.

[0034] The other structures of this example are the same as those of Example 1.

Claims

1. A drop-down node connection structure of a steel truss floor deck, comprising an I-shaped steel beam, floor decks are laid on both sides of the steel beam, and the floor decks on both sides of the steel beam are respectively a first floor deck and a second floor deck, characterized in that: The top surface of the steel beam is provided with an upper beam plate, the end of the first floor deck is laid on the upper surface of the upper beam plate, a Z-shaped strap is provided on the side of the upper beam plate facing the second floor deck, the upper surface of the Z-shaped strap is laid on one side of the upper surface of the upper beam plate, and the end of the second floor deck is laid on the lower plate of the Z-shaped strap; The floor decking plate includes a bottom plate and a plurality of steel trusses, wherein the lower portion of the steel trusses is provided with mutually staggered lower reinforcements, and the lower reinforcements are respectively lower longitudinal reinforcements and lower transverse reinforcements, and the upper portion of the steel trusses is provided with mutually staggered upper reinforcements, and the upper reinforcements are respectively upper longitudinal reinforcements and upper transverse reinforcements, the first floor decking plate is higher than the second floor decking plate, and the height difference between the first floor decking plate and the second floor decking plate does not exceed the self-height of the first floor decking plate or the second floor decking plate, a first connecting rib is provided between the upper reinforcement of the first floor decking plate and the lower reinforcement of the second floor decking plate, a second connecting rib is provided between the lower reinforcement of the first floor decking plate and the lower reinforcement of the second floor decking plate, and a third connecting rib is provided on the upper reinforcement of the second floor decking plate extending toward one side of the first floor decking plate.

2. The drop-down node connection structure of a steel truss floor deck according to claim 1 is characterized in that: The upper and lower ends of the first and third connecting bars are horizontal, and the middle sections are inclined. The upper end of the first connecting bar is bent downward, and the lower end is bent upward. The upper and lower ends of the second connecting bar are both bent upward, and one end of the third connecting bar facing the first floor deck is bent downward and welded to the bent section at the upper end of the second connecting bar.

3. The drop-down node connection structure of a steel truss floor deck according to claim 1 or 2, characterized in that: The steel trusses of the first floor decking plate and the second floor decking plate are perpendicular to the steel beams, the upper section of the first connecting rib is welded to the upper longitudinal reinforcement of the first floor decking plate, and the lower section of the first connecting rib is welded to the lower longitudinal reinforcement of the second floor decking plate; the upper section of the second connecting rib is welded to the lower longitudinal reinforcement of the first floor decking plate, and the lower section of the second connecting rib is welded to the lower longitudinal reinforcement of the second floor decking plate; the third connecting rib is welded to the upper longitudinal reinforcement of the second floor decking plate.

4. The drop-down node connection structure of a steel truss floor deck according to claim 1 or 2, characterized in that: The steel trusses of the first floor decking plate are perpendicular to the steel beams, the steel trusses of the second floor decking plate are parallel to the steel beams, the upper section of the first connecting rib is welded to the upper longitudinal reinforcement of the first floor decking plate, and the lower section of the first connecting rib is welded to the lower transverse reinforcement of the second floor decking plate; the upper section of the second connecting rib is welded to the lower longitudinal reinforcement of the first floor decking plate, and the lower section of the second connecting rib is an integral extension of the lower transverse reinforcement of the second floor decking plate; the third connecting rib is welded to the upper transverse reinforcement of the second floor decking plate.

5. The drop-down node connection structure of a steel truss floor deck according to claim 1 or 2, characterized in that: The width of the upper plate and the lower plate of the Z-shaped buttress is not less than 60mm.

6. The drop-down node connection structure of a steel truss floor deck according to claim 1 or 2, characterized in that: The lap length of the first connecting reinforcement on both sides of the steel beam is not less than 800 mm; the lap length of the second connecting reinforcement on both sides of the steel beam is not less than 400 mm.

7. The drop-down node connection structure of a steel truss floor deck according to claim 1 or 2, characterized in that: The steel truss of the floor decking plate includes an upper chord steel bar and two lower chord steel bars, which are distributed in a herringbone shape. Wave-shaped web bars are provided between the two side walls of the upper chord steel bar and the inner side walls of the two lower chord steel bars. The web bars are fixed to the bottom plate after being horizontally bent at the trough.

8. The drop-down node connection structure of a steel truss floor deck according to claim 7, characterized in that: The upper transverse reinforcement is perpendicular to the upper chord steel bars and horizontally laid and fixed between each upper chord steel bars, the lower transverse reinforcement is perpendicular to the lower chord steel bars and horizontally laid and fixed between each lower chord steel bars; the upper longitudinal reinforcement is parallel to the upper chord steel bars and fixedly laid between each upper transverse reinforcement, the lower longitudinal reinforcement is parallel to the lower chord steel bars and fixedly laid between each lower transverse reinforcement.

9. The drop-down node connection structure of a steel truss floor deck according to claim 7, characterized in that: An upper longitudinal reinforcement and a lower longitudinal reinforcement are arranged between adjacent steel trusses, and an upper transverse reinforcement and a lower transverse reinforcement are arranged between adjacent wave crests of the web member reinforcement.

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