Composite material-metal combined truss connecting joint and joint assembling method

Abstract

The invention relates to a composite material-metal combined truss connecting joint and a joint assembling method. Comprising a metal upper chord, four diagonal web member members, two diagonal vertical rod members, a diagonal vertical rod gusset plate and a diagonal web member gusset plate, each inclined vertical rod component comprises a composite material inclined vertical rod and an inclined vertical rod outer metal sleeve, and the two inclined vertical rod components are welded to the lower surface of the metal upper chord through an inclined vertical rod node plate; each diagonal web member component comprises a composite diagonal web member and a diagonal web member outer metal sleeve, the two diagonal web member components on one side are welded to the bottom and the side face of the metal upper chord member through a diagonal web member node plate, and the two diagonal web member node plates are symmetrically arranged on the two sides of a diagonal vertical rod node plate; and two arc rib plates are welded in the metal upper chord member and are positioned between the inclined web member gusset plate and the inclined vertical rod gusset plate. The composite material pre-tightening force tooth connection joint only transmits axial force and does not transmit bending moment, force transmission is reasonable, the safety of the joint is guaranteed, and the weight reduction effect is more obvious.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of composite-metal truss, and particularly relates to a composite-metal truss connecting joint and a joint assembling method. BACKGROUND

[0002] The composite-metal truss structure is assembled and welded by a plurality of composite members and metal members through a joint plate and a joint. The structure can fully exert the mechanical properties of the composite material in the fiber direction, has a more obvious weight reduction effect compared with the steel truss structure and the traditional composite-metal truss structure connecting joint, and is widely used in different fields. The connecting point in the composite truss structure not only needs to transmit a large load, but also needs to consider the influence of the generated accessory bending moment of the joint on the composite connecting joint. Therefore, the influence of the arrangement of the joint connecting structure in the composite truss structure on the mechanical properties of the joint and the feasibility of processing in the manufacturing process need to be comprehensively considered.

[0003] The existing composite-metal truss structure has a connecting joint form, which realizes the connection between the composite members and the connection between the composite members and the metal members through a spherical hinge. There are two disadvantages in this connection mode. First, the spherical hinge is heavy, so the self-weight of the composite truss structure is large. Second, the spherical hinge is approximately completely rigid, which not only transmits the axial force but also needs to transmit a large bending moment, which is not conducive to the stress of the composite pre-tightening tooth connecting joint. Therefore, how to effectively realize the effective connection between the composite members and the composite members and the metal members in the composite-metal truss structure becomes the key to whether the composite-metal truss structure can bear a large load while reducing the weight. SUMMARY

[0004] The purpose of the present application is to provide a composite-metal truss structure with a connecting joint form, which can be achieved by the following measures: a composite pre-tightening tooth connecting joint is arranged at the end of a composite material rod, and the composite pre-tightening tooth connecting joint is generally made of weldable ordinary steel, such as Q345 or Q420 steel. In order to ensure the connection between the composite pre-tightening tooth connecting joint and the metal member, a slot is formed in the outer metal sleeve of the composite pre-tightening tooth connecting joint, and then one end of the metal joint plate is inserted into the slot of the outer metal sleeve and welded with the outer metal sleeve, and the other end can be directly welded with the metal member, so as to realize the connection between the composite member and the metal member. In this way, the connection through the joint plate belongs to semi-rigid connection, which can only transmit the axial load and reduce the influence of the in-plane bending moment on the mechanical properties of the composite connecting joint.

[0005] The technical scheme for achieving the object of the present application is as follows: a composite-metal combined truss connecting joint, comprising a metal top chord, four diagonal web members, two diagonal vertical members, a diagonal vertical member joint plate and a diagonal web member joint plate;

[0006] The metal top chord is a closed box girder structure; the two diagonal vertical members comprise a composite diagonal vertical member and a diagonal vertical member outer metal sleeve, and the two diagonal vertical members are welded to the lower surface of the metal top chord through a diagonal vertical member joint plate; each diagonal web member comprises a composite diagonal web member and a diagonal web member outer metal sleeve, and two diagonal web members on one side are welded to the bottom and side surface of the metal top chord through a diagonal web member joint plate, and two diagonal web member joint plates are symmetrically arranged on both sides of the diagonal vertical member joint plate; two circular-arc rib plates are welded in the metal top chord, and the positions of the circular-arc rib plates are between the diagonal web member joint plate and the diagonal vertical member joint plate.

[0007] Further, the diagonal web member outer metal sleeve and the composite diagonal web member are connected through pre-tightening force teeth, the inner wall of the connecting section of the diagonal web member outer metal sleeve and the composite diagonal web member is provided with connecting teeth, the side wall of the diagonal web member outer metal sleeve is provided with opposite rectangular notches, and the two side walls between the two rectangular notches are provided with circular-arc grooves;

[0008] The diagonal vertical member outer metal sleeve and the composite diagonal vertical member are connected through pre-tightening force teeth, the inner wall of the connecting section of the diagonal vertical member outer metal sleeve and the composite diagonal vertical member is provided with connecting teeth, the side wall of the diagonal vertical member outer metal sleeve is provided with opposite rectangular notches, and the two side walls between the two rectangular notches are provided with circular-arc grooves.

[0009] Further, the diagonal vertical member joint plate is a polygonal plate, the upper side surface in the thickness direction of the diagonal vertical member joint plate is a plane and is welded to the bottom surface of the metal top chord, the lower side surface in the thickness direction of the diagonal vertical member joint plate is two sections connected with the two diagonal vertical member outer metal sleeves, the included angle of the two sections matches the arrangement of the two diagonal vertical members, the main body of the diagonal vertical member joint plate is inserted into the rectangular notch and is welded to the rectangular notch, the thickness of the diagonal vertical member joint plate matches the width of the rectangular notch, and the upper section of the two side surfaces of the diagonal vertical member joint plate is convergently arranged from the middle part to the upper side surface.

[0010] Further, the connecting position of the diagonal web member joint plate and the metal top chord is provided with a notch matching the shape of the metal top chord, the diagonal web member joint plate is inserted into the lower part of the metal top chord, and the notch of the diagonal web member joint plate is welded to the bottom side of the metal top chord in contact;

[0011] The lower side surface in the thickness direction of the diagonal web member joint plate is two sections connected with each other, the included angle of the two sections matches the arrangement of the two diagonal web members on one side, and the upper section of the two side surfaces of the diagonal web member joint plate is convergently arranged from the middle upper part to the upper side surface.

[0012] Further, the metal top chord is welded to form a closed box girder structure by an upper cover plate, a lower bottom plate, two groove-shaped steels and two end sealing plates.

[0013] The bottom edge of the arc rib plate is welded to the bottom plate, and the two sides of the arc rib plate are welded to the inner side of the channel steel. The upper part of the arc rib plate has an arc notch.

[0014] Furthermore, a double-eared metal connector is welded to one end of the metal upper chord, and a single-eared metal connector is welded to the other end.

[0015] Furthermore, the upper cover plate, lower bottom plate, arc rib plate, diagonal vertical bar node plate, diagonal web bar node plate, sealing plate, diagonal web bar outer metal sleeve and diagonal vertical bar outer metal sleeve are made of weldable steel.

[0016] An assembly method for the above-mentioned connection node includes the following steps:

[0017] Step (1): Assemble and weld the metal upper chord: Assemble and weld the two channel steels and the bottom plate, then weld the arc ribs at the corresponding internal node connection positions, assemble and weld the top cover plate after completion, then insert single-ear or double-ear joints into both ends of the metal upper chord and weld them, and then weld the sealing plates at both ends to form a closed box girder structure.

[0018] Step (2): Welding node plates: Insert two diagonal web member node plates with grooves into the metal upper chord at a preset angle and arrange them symmetrically. Weld the diagonal web member node plates to the lower surface of the metal upper chord respectively. Arrange the diagonal vertical member node plates on the center line and weld the diagonal vertical member node plates to the lower surface of the metal upper chord, thereby realizing the semi-rigid connection between the diagonal web member node plates and the diagonal vertical member node plates and the metal upper chord.

[0019] Step (3): Assemble the outer metal sleeve of the diagonal web bar on the composite material diagonal web bar by connecting the pre-tightening teeth. After the assembly is completed, open a rectangular slot on the outer metal sleeve of the diagonal web bar and insert the outer metal sleeve of the diagonal web bar along the node plate of the diagonal web bar into the slot. After the assembly is in place, weld the node plate of the diagonal web bar to the outer metal sleeve of the diagonal web bar.

[0020] Step (4): The composite material inclined vertical bar is connected to the inclined vertical bar outer metal sleeve through the pre-tightening force tooth connection. After the assembly is completed, a rectangular slot is opened on the vertical bar outer metal sleeve. The vertical bar outer metal sleeve is inserted into the slot along the inclined vertical bar node plate. After the assembly is in place, the inclined vertical bar node plate is welded to the vertical bar outer metal sleeve to complete the node assembly.

[0021] Compared with the prior art, the significant advantages of this invention are:

[0022] 1. By utilizing the semi-rigid connection of the node plate, the pre-tightened toothed joint of the composite material only transmits axial force and not bending moment, and the force transmission is reasonable to ensure the safety of the joint.

[0023] 2. Compared with the traditional steel ball hinge node connection, this connection node type can effectively reduce the node weight, thus making the weight reduction effect of composite material-metal composite truss structure more obvious. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a composite material-metal truss structure.

[0025] Figure 2 This is an exploded view of the metal top chord.

[0026] Figure 3 A schematic diagram showing the setup of the arc-shaped rib plate.

[0027] Figure 4 This is a schematic diagram of a metal double-ear connector.

[0028] Figure 5 This is a schematic diagram of a metal single-ear connector.

[0029] Figure 6 This is a schematic diagram of the node plate on the diagonal web member.

[0030] Figure 7 This is a schematic diagram of the oblique vertical member node plate.

[0031] Figure 8 This is a schematic diagram of the connection node of the composite material-metal truss.

[0032] Figure 9 This is a schematic diagram of a diagonal web member.

[0033] Figure 10 This is a schematic diagram of the outer metal sleeve of the diagonal web member.

[0034] Figure 11 This is a physical image of a composite material-metal truss.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Metal upper chord, 2-Diagonal web member, 3-Diagonal vertical member, 10-Channel steel, 11-Metal double-ear joint, 12-Metal single-ear joint, 13-Upper cover plate, 14-Lower base plate, 15-Circular arc rib plate, 16-Diagonal vertical member node plate, 17-Diagonal web member node plate, 18-Sealing plate, 21-Diagonal web member outer metal sleeve, 22-Composite material diagonal web member, 211-Rectangular slot, 212-Circular arc slot, 24-Circular arc slot, 31-Diagonal vertical member outer metal sleeve, 32-Composite material diagonal vertical member. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings.

[0038] A composite material-metal truss structure, such as Figure 1As shown, the detailed connection details of node A are as follows: Figure 8 The diagram shows the connection configuration of the nodes between composite material components and metal components;

[0039] The connecting node is assembled and welded from a metal top chord member 1, four diagonal web members 2, and two diagonal vertical members 3 via two diagonal web member node plates 17 and one diagonal vertical member node plate 16. The metal top chord member 1, for example... Figure 2 As shown, it is welded from two channel steels 10, an upper cover plate 13, a lower bottom plate 14, an arc-shaped rib plate 15, and a sealing plate 18. Metal double-ear joints 11 and single-ear joints 12 are welded to both sides of the metal upper chord, as shown. Figure 4 , 5 As shown, connections between trusses can be achieved. To facilitate the connection between composite material components and the metal upper chord 1, diagonal web member node plates 17 and diagonal vertical member node plates 16 are welded to corresponding positions on the lower base plate 14 of the metal upper chord 1. The diagonal web member node plate 17 has a groove, the size of which matches the width of the metal upper chord 1, facilitating the assembly, insertion, and welding of the diagonal web member node plate 17 to transmit force through the weld. Figure 6 As shown, the upper surface of the diagonal vertical member node plate 16 is directly welded to the lower base plate of the metal upper chord member 1, as... Figure 7 As shown.

[0040] To prevent the concentrated force transmission between the diagonal web member 2 and the diagonal vertical member 3 from causing local instability in the metal upper chord member 1, such as... Figure 3 As shown, at the connection position of node A, an arc-shaped rib plate 15 is respectively installed inside the metal upper chord 1, corresponding to the diagonal web member node plate 17 and the diagonal vertical member node plate 16, and welded to the web plate and bottom surface of the channel steel 10. For example... Figure 8 As shown, corresponding to the connected components, the diagonal web member 2 and the diagonal vertical member 3, wherein the diagonal web member 2 is composed of an outer metal sleeve 21 and a composite material diagonal web member 22, as... Figure 9 As shown, it is connected by preload teeth, as... Figure 10 As shown, the outer metal sleeve 21 of the diagonal web member has a rectangular slot 211 and a circular arc slot 212. The rectangular slot 211 is used to assemble and insert with the node plate 17 on the diagonal web member and weld to transmit force through the weld. The circular arc slot 24 is mainly used for node weight reduction. The same method is used to connect the diagonal vertical member 3 with the metal upper chord 1.

[0041] The assembly method for connecting nodes includes the following steps:

[0042] Step (1): Assemble and weld the metal upper chord: Assemble and weld the two channel steels 10 and the bottom plate 14, then weld the arc ribs 15 at the corresponding internal node connection positions, assemble and weld the top cover plate 13 after completion, then insert single-ear or double-ear joints into both ends of the metal upper chord and weld them, and then weld the sealing plates 18 at both ends to form a closed box girder structure.

[0043] Step (2): Welding node plates: Insert two diagonal web member node plates 17 with grooves into the metal upper chord at a preset angle and arrange them symmetrically. Weld the diagonal web member node plates 17 to the lower surface of the metal upper chord respectively. Arrange the diagonal vertical member node plates 16 on the center line and weld the diagonal vertical member node plates 16 to the lower surface of the metal upper chord, thereby realizing the semi-rigid connection between the diagonal web member node plates 17 and the diagonal vertical member node plates 16 and the metal upper chord.

[0044] Step (3): Assemble the outer metal sleeve 21 of the diagonal web bar 22 by pre-tightening tooth connection on the composite material diagonal web bar 22. After assembly, open a rectangular slot 211 on the outer metal sleeve 21 of the diagonal web bar. Insert the outer metal sleeve 21 of the diagonal web bar along the diagonal web bar node plate 17 into the slot. After assembly, weld the diagonal web bar node plate 17 to the outer metal sleeve 21 of the diagonal web bar.

[0045] Step (4): The composite material inclined vertical rod 32 is connected to the inclined vertical rod outer metal sleeve 31 through the pre-tightening force tooth connection. After the assembly is completed, a rectangular slot is opened on the vertical rod outer metal sleeve 31. The vertical rod outer metal sleeve 31 is inserted into the slot along the inclined vertical rod node plate 16. After the assembly is in place, the inclined vertical rod node plate 16 is welded to the vertical rod outer metal sleeve 31 to complete the node assembly.

Claims

1. A composite material-metal truss connection node, characterized in that, It includes a metal top chord (1), four diagonal web members (2), two diagonal vertical members (3), diagonal vertical member node plate (16), and diagonal web member node plate (17); The metal top chord (1) is a closed box girder structure; the two diagonal vertical members (3) include a composite material diagonal vertical member (32) and a diagonal vertical member outer metal sleeve (31), and the two diagonal vertical members (3) are welded to the lower surface of the metal top chord (1) through a diagonal vertical member node plate (16); each diagonal web member (2) includes a composite material diagonal web member (22) and a diagonal web member outer metal sleeve (21), and the two diagonal web members (2) on one side are welded to the bottom and side of the metal top chord (1) through a diagonal web member node plate (17), and the two diagonal web member node plates (17) are symmetrically arranged on both sides of the diagonal vertical member node plate (16); two arc ribs (15) are welded inside the metal top chord (1), and the position of the arc ribs (15) is located between the diagonal web member node plate (17) and the diagonal vertical member node plate (16).

2. The connection node according to claim 1, characterized in that, The outer metal sleeve (21) of the inclined web member and the composite material inclined web member (22) are connected by pre-tightening teeth. The inner wall of the connecting section of the outer metal sleeve (21) of the inclined web member and the composite material inclined web member (22) is provided with connecting teeth. The side wall of the outer metal sleeve (21) of the inclined web member is provided with opposite rectangular slots (211). The two side walls between the two rectangular slots (211) are provided with arc grooves (212). The outer metal sleeve (31) of the inclined vertical rod and the composite material inclined vertical rod (32) are connected by pre-tightening teeth. The inner wall of the connecting section of the outer metal sleeve (31) of the inclined vertical rod and the composite material inclined vertical rod (32) is provided with connecting teeth. The side wall of the outer metal sleeve (31) of the inclined vertical rod is provided with opposite rectangular slots. The two side walls between the two rectangular slots are provided with arc grooves.

3. The connection node according to claim 2, characterized in that, The oblique vertical bar node plate (16) is a polygonal plate. The upper side of the oblique vertical bar node plate (16) in the thickness direction is a plane and is welded to the bottom surface of the metal upper chord (1). The lower side of the oblique vertical bar node plate (16) in the thickness direction is two sections connected to the outer metal sleeves (31) of the two oblique vertical bars. The included angle of the two sections matches the setting of the two oblique vertical bar components (3). The lower part of the main body of the oblique vertical bar node plate (16) is inserted into the rectangular slot and welded to the rectangular slot. The thickness of the oblique vertical bar node plate (16) and the width of the rectangular slot are compatible. The upper sections of the two sides of the oblique vertical bar node plate (16) converge from the middle to the upper side.

4. The connection node according to claim 3, characterized in that, The diagonal brace node plate (17) is provided with a slot that matches the shape of the metal upper chord (1) at the connection point with the metal upper chord (1). The diagonal brace node plate (17) is inserted into the lower part of the metal upper chord (1), and the slot of the diagonal brace node plate (17) is welded to the bottom side of the metal upper chord (1). The lower side of the diagonal brace node plate (17) in the thickness direction is two segments connected to the two segments. The included angle of the two segments matches the setting of the two diagonal brace members (2) on one side. The upper segments of the two sides of the diagonal brace node plate (17) converge from the middle upper part to the upper side.

5. The connection node according to claim 4, characterized in that, The metal upper chord (1) is formed by welding the upper cover plate (13), the lower bottom plate (14), two channel steels (10) and the sealing plates (18) at both ends to form a closed box girder structure; The bottom edge of the arc rib (15) is welded to the bottom plate (14), and the two sides of the arc rib (15) are welded to the inner side of the channel steel (10). The upper part of the arc rib (15) is an arc notch.

6. The connection node according to claim 5, characterized in that, The metal upper chord (1) has a metal double-ear connector (11) welded to one end and a metal single-ear connector (12) welded to the other end.

7. The connection node according to claim 6, characterized in that, The upper cover plate (13), lower bottom plate (14), arc rib plate (15), diagonal vertical bar node plate (16), diagonal web bar node plate (17), sealing plate (18), diagonal web bar outer metal sleeve (21) and diagonal vertical bar outer metal sleeve (31) are made of weldable steel.

8. A method for assembling a connection node as described in claim 7, characterized in that, Includes the following steps: Step (1): Assemble and weld the metal upper chord: Assemble and weld the two channel steels (10) and the bottom plate (14), then weld the arc ribs (15) at the corresponding internal node connection positions, assemble and weld the top cover plate (13), then insert single-ear or double-ear joints into both ends of the metal upper chord and weld them, and then weld the sealing plates (18) at both ends to form a closed box girder structure. Step (2): Welding node plates: Insert two diagonal web member node plates (17) with grooves into the metal upper chord at a preset angle and arrange them symmetrically. Weld the diagonal web member node plates (17) to the lower surface of the metal upper chord respectively. Arrange the diagonal vertical member node plates (16) on the center line and weld the diagonal vertical member node plates (16) to the lower surface of the metal upper chord, thereby achieving a semi-rigid connection between the diagonal web member node plates (17) and the diagonal vertical member node plates (16) and the metal upper chord. Step (3): Assemble the outer metal sleeve (21) of the diagonal web bar (22) by pre-tightening tooth connection. After assembly, open a rectangular slot (211) on the outer metal sleeve (21) of the diagonal web bar. Insert the outer metal sleeve (21) of the diagonal web bar along the node plate (17) of the diagonal web bar into the slot. After assembly, weld the node plate (17) of the diagonal web bar to the outer metal sleeve (21). Step (4): The composite material inclined vertical rod (32) is connected to the inclined vertical rod outer metal sleeve (31) through the pre-tightening force tooth connection. After the assembly is completed, a rectangular slot is opened on the vertical rod outer metal sleeve (31). The vertical rod outer metal sleeve (31) is inserted into the slot along the inclined vertical rod node plate (16). After the assembly is in place, the inclined vertical rod node plate (16) is welded to the vertical rod outer metal sleeve (31) to complete the node assembly.

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