A welding node of steel truss and steel truss structure

Abstract

The present invention discloses a welding node of a steel truss and a steel truss structure, which relates to the field of bridge construction. The device includes: a chord, which includes an inner flange plate and an outer flange plate, and two reinforcing partitions are arranged between the inner flange plate and the outer flange plate; two node plates spaced apart in the transverse direction of the bridge; a first web member and a second web member connected to the node plate, and the web of each web member extends along the length direction and is connected to a preset force transmission point of the inner flange plate, and the preset force transmission point corresponds to the position of one of the reinforcing partitions. In the present application, the web of the web member is extended and the web member is directly connected to the inner flange plates of the upper and lower chord members, and at the same time, a reinforcing partition is arranged at a corresponding position in the chord member so that the web member force can be effectively transmitted to the node, and there is no weak section, and there is no need to perform tearing inspection of the node plate. In the present invention, a sealing plate is arranged in the node plate, and the sealing plate can reduce the maintenance work of the node plate of the bridge during operation.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a welding node of a steel truss beam and a steel truss beam structure. Background Art

[0002] The node of a steel truss is where the main truss chord and the web meet, and the forces are complex. At present, most steel trusses use integral nodes, and the node parts are welded into a whole. The chord is generally connected to the web through a node plate. When the web is connected by butt splicing or welding, it is necessary to set a joint plate in the integral node to connect the web of the web to transfer the force of the web. The joint plate is generally set to a length of about 1m and then disconnected. The force of the web of the web is transferred to the node plate through the weld. The node plate is complex and the tearing path is difficult to obtain using numerical methods. Moreover, this structure will form a weak section at the disconnection of the joint plate, especially for box-type webs that are subject to large axial forces and in-plane bending moments. This structure is extremely unfavorable to the forces of the overall node. Summary of the invention

[0003] In view of the problem that there is a weak section at the node plate of the chord welding node in the prior art and the tearing path is difficult to detect due to complex force, the present invention provides a welding node structure of a steel truss beam, which includes:

[0004] A chord, comprising an inner flange plate and an outer flange plate, wherein two reinforcing partitions are arranged between the inner flange plate and the outer flange plate;

[0005] Two node plates are arranged at intervals in the transverse direction of the bridge, and the two node plates are arranged on the chord;

[0006] A first web member connected to the node plate, comprising at least one first web plate, the first web plate extending in the length direction and connected to a first preset force transmission point of the inner flange plate, the first preset force transmission point corresponding to a position of the reinforcing diaphragm;

[0007] The second web connected to the node plate includes at least one second web plate, the second web plate extends along the length direction and is connected to a second preset force transmission point of the inner flange plate, and the second preset force transmission point corresponds to a position of the reinforced partition.

[0008] In some embodiments, the first web member is a box-type web member, and the first web member further includes a first inner web plate, and the first inner web plate is connected to the inner flange plate after being bent.

[0009] In some embodiments, the first inner web plate is connected to a third preset force transmission point of the inner flange plate, and the third preset force transmission point corresponds to a node diaphragm position of the chord.

[0010] In some embodiments, a stiffening plate is provided at the third preset force transmission point of the inner flange plate, and the first inner web plate is connected to the inner flange plate via the stiffening plate.

[0011] In some embodiments, a first web partition is provided between the first inner web and the first web. The first web partition extends radially from a bending position of the first inner web and is connected to the first web.

[0012] In some embodiments, the second web member is an I-shaped web member.

[0013] In some embodiments, at least one sealing plate is disposed inside each of the first web member and the second web member.

[0014] In some embodiments, the second web member is a box-type web member, and the second web member further includes a second inner web plate, and the second web member is connected to the inner flange plate after being bent.

[0015] On the other hand, the present application provides a steel truss, which includes: at least two welding nodes arranged up and down, the welding nodes including:

[0016] A chord, comprising an inner flange plate and an outer flange plate, wherein two reinforcing partitions are arranged between the inner flange plate and the outer flange plate;

[0017] Two node plates are arranged at intervals in the transverse direction of the bridge, and the two node plates are arranged on the chord;

[0018] A first web member connected to the node plate, comprising at least one first web plate, the first web plate extending in the length direction and connected to a first preset force transmission point of the inner flange plate, the first preset force transmission point corresponding to a position of the reinforcing diaphragm;

[0019] The second web connected to the node plate comprises at least one second web plate, the second web plate extends along the length direction and is connected to a second preset force transmission point of the inner flange plate, and the preset force transmission point corresponds to a position of the reinforced partition plate.

[0020] In some embodiments, the first web member is a box-type web member or an I-shaped web member, and the second web member is a box-type web member or an I-shaped web member.

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

[0022] In the present application, the web of the web member is extended and directly connected to the bottom surfaces of the upper and lower chord members, and reinforcing partitions are arranged at corresponding positions in the chord member so that the web member force can be effectively transmitted to the node. There is no weak section and no need to perform node plate tearing inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic elevation view of a chord member serving as an upper chord member and two I-shaped web members at a welding node in an embodiment of the present invention;

[0025] Figure 2 It is a schematic elevation view of a chord member serving as an upper chord member and a box-shaped web member and an I-shaped web member at a welding node in an embodiment of the present invention;

[0026] Figure 3 It is a schematic elevation view of a chord member serving as an upper chord member and two box-shaped web members at a welding node in an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the chord member as the lower chord member and two box-shaped web members at the node in an embodiment of the present invention;

[0028] Figure 5 It is a schematic elevation view of a chord member as a lower chord member and two I-shaped web members at a welding node in an embodiment of the present invention;

[0029] Figure 6 It is a schematic elevation view of a chord member serving as a lower chord member and a box-shaped web member and an I-shaped web member at a welding node in an embodiment of the present invention;

[0030] Figure 7 It is a schematic elevation view of a welding node between a chord member serving as a lower chord member and two box-type web members in an embodiment of the present invention.

[0031] In the figure: 1, node plate; 11, sealing plate; 2, chord; 21, inner flange plate; 22, outer flange plate; 23, reinforcing partition; 24, node partition; 241, stiffening plate; 25, chord web; 3, first web; 31, first web; 32, first inner web; 33, first web partition; 34, first flange; 4, second web; 41, second web; 42, second inner web; 43, second web partition; 44, second flange. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. The inventor discovered that in the welding process of the node plate and the web member in the related art, a joint plate needs to be provided in the node plate to connect with the web of the web member to transfer the force of the web of the web member. However, the joint plate is generally only provided with a length of about 1m and then disconnected. When the node plate is subjected to the force transmitted by the web member, a weak section subjected to force will be formed at the disconnection of the joint plate. Since the welding connection makes it difficult for technicians to accurately perform tearing inspection and calculation on the node plate, this structure is extremely unfavorable to the force of the entire node. Therefore, the inventor extends the web of the web member into the node plate to the chord.

[0034] The present application provides a welded node structure of a steel truss, which comprises: a chord 2, two node plates spaced apart in the transverse direction of the bridge, and a first web member 3 and a second web member 4 connected to the node plate 1; wherein:

[0035] The chord 2 comprises an inner flange plate 21, an outer flange plate 22 and a chord web plate 25, wherein two reinforcing partition plates 23 are provided between the inner flange plate 21 and the outer flange plate 22;

[0036] Two node plates 1 spaced apart in the transverse direction of the bridge, the two node plates 1 are arranged on the chord web 25 of the chord 2; a first web member 3, which includes at least one first web plate 31 and a first flange plate 34 connected to the first web plate 31, the first flange plate 34 is connected to the node plate 1, the first web plate 31 extends along the length direction and is connected to a first preset force transmission point of the inner flange plate 21, and the preset force transmission point corresponds to the position of one of the reinforcing partitions 23; a second web member 4, which includes at least one second web plate 41 and a second flange plate 44 connected to the second web plate 41, the second flange plate 44 is connected to the node plate 1, the second web plate 41 extends along the length direction and is connected to a second preset force transmission point of the inner flange plate 21, and the second preset force transmission point corresponds to the position of one of the reinforcing partitions 23.

[0037] It is worth noting that in the present application, the first web member 3 can be a box-shaped web member or an I-shaped web member, and the second web member 4 can also be a box-shaped web member or an I-shaped web member. However, the structures of the two are different, so the welding structure will be adjusted accordingly.

[0038] It is understandable that the chord 2 can be either an upper chord or a lower chord. Regardless of whether the chord 2 is an upper chord or a lower chord, the inner flange plate 21 of the chord 2 is a bottom plate close to the first web member 3 and the second web member 4. The outer flange plate 22 is a plate member opposite to the inner flange plate 21, and is a plate member away from the first web member 3 and the second web member 4.

[0039] It is worth noting that the welding node of the present application is highly applicable: the type of the web connected to the upper chord and the lower chord can be selected as a box-shaped web or an I-shaped web according to the working conditions. And the first preset force transmission point and the second preset force transmission point on the chord 2 need to be measured in advance.

[0040] Specifically, Figure 1 As shown, the first web member 3 and the second web member 4 are both I-shaped web members, and their force transmission webs are the first web 31 and the second web 41 .

[0041] It can be understood that the web of the web member extending into the node plate to the chord 2 can effectively transfer the force on the web member directly to the reinforcing partition 23 of the chord 2, and the force of the web member can be effectively transferred to the node, there is no weak section, and there is no need to perform node plate tearing inspection.

[0042] In some embodiments, the node partition 24 of the chord 2 is disposed between the two reinforcement partitions 23 .

[0043] In some specific embodiments, Figure 2 As shown, the first web member 3 is a box-shaped web member, and the second web member 4 is an I-shaped web member. In this case, the first web member 3 is a box-shaped web member, and its web member also includes a first inner web plate 32. At this time, the force transmission web of the first web member 3 is the first inner web plate 32 and the first web plate 31. The first web member 3 is provided with a first inner web plate 32 on the side close to the second web member 4. The first inner web plate 32 is connected to the inner flange plate 21 after being bent in the node plate 1.

[0044] Preferably, the first inner web 32 is connected to a third preset force transmission point of the inner flange plate 21 , and the third preset force transmission point corresponds to the position of the node diaphragm 24 . The third preset force transmission point corresponds to the position of the node diaphragm 24 between the two reinforcing diaphragms 23 .

[0045] It is worth noting that a stiffening plate 241 is provided at the third preset force transmission point, and the stiffening plate 241 is arranged along the vertical direction. The first inner web plate 32 is connected to the inner flange plate 21 through the stiffening plate 241 .

[0046] It can be understood that a first web partition 33 is provided between the first inner web 32 and the first web 31, and the first web partition 33 extends radially from the bending position of the first inner web 32 and is connected to the first web 31. The first web partition 33 is used to transfer the radial force generated by the bending of the box-shaped web.

[0047] Preferably, at least one sealing plate 11 is provided in the first web member 3 and the second web member 4. The sealing plate 11 provides the node plate with better waterproofing and other functions to reduce the maintenance work during the operation of the bridge. When the web member is a box-shaped web member, there are many plates at the node, which is inconvenient for later maintenance, and the sealing plate 11 is added to seal the node.

[0048] Optionally, the sealing plate 11 extends from the first inner web 32 at the bending portion to the second web 41 of the second web member 4 and is connected to the second web 41 .

[0049] In another embodiment, Figure 3 and Figure 4 As shown, the first web member 3 and the second web member 4 are both box-type web members, and the first inner web plate 32 and the second inner web plate 42 are respectively provided on opposite sides of the first web member 3 and the second web member 4, and the first inner web plate 32 and the second inner web plate 42 are connected by welding to the stiffening plate 241 at the third preset force transmission point after being bent in the node plate 1. The first web member partition plate 33 is provided radially at the bending part of the first inner web plate 32; and the second web member partition plate 43 is provided radially at the bending part of the second inner web plate 42.

[0050] On the other hand, the present application also provides a steel truss beam, which includes a plurality of the above-mentioned welding nodes.

[0051] It is worth noting that the chord 2 of the steel truss is divided into an upper chord and a lower chord, and both the upper chord and the lower chord are provided with a plurality of welding nodes along the longitudinal direction of the bridge, and the two are connected by a plurality of first web members 3 and second web members 4.

[0052] The steel truss welding node provided in the present application has strong applicability, and construction personnel can select a box-type web member or an I-shaped web member as the first web member 3 or the second web member 4 according to the site conditions.

[0053] It is worth mentioning that Figure 1 , Figure 2 and Figure 3 FIG. 2 is a structural diagram of an embodiment in which the chord bar 2 is used as an upper chord bar. Figure 4 , Figure 5 , Figure 6 and Figure 7 It is a structural diagram of an embodiment in which the chord bar 2 is used as a lower chord bar.

[0054] In summary, in the present application, the web of the web member is extended and the web member is directly connected to the bottom surface of the upper and lower chords, and at the same time, a reinforcing partition is set at the corresponding position in the chord so that the web member force can be effectively transmitted to the node, there is no weak section, and there is no need to perform tearing inspection of the node plate. In the present invention, a sealing plate is set in the node plate, and the sealing plate can reduce the maintenance work of the node plate of the bridge during operation. In the present invention, a web member partition is set at the bending part of the inner web of the box-type web member to transmit the radial force generated by the bending of the web. Under the main idea of ​​the present invention, it can adapt to the force transmission requirements of the web member structure of the I-shaped web member, the box-type web member, and the combination of the I-shaped and box-shaped web members.

[0055] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0056] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0057] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A welding node of a steel truss, characterized in that: include: A chord (2), comprising an inner flange plate (21) and an outer flange plate (22), wherein two reinforcing partition plates (23) are provided between the inner flange plate (21) and the outer flange plate (22); Two node plates (1) spaced apart in the transverse direction of the bridge, the two node plates (1) being arranged on the chord rod (2); a first web member (3) connected to the node plate (1), comprising at least one first web plate (31), wherein the first web plate (31) extends in a length direction and is connected to a first preset force transmission point of the inner flange plate (21), wherein the first preset force transmission point corresponds to a position of a reinforcement partition plate (23); a second web member (4) connected to the node plate (1), comprising at least one second web plate (41), the second web plate (41) extending in the length direction and connected to a second preset force transmission point of the inner flange plate (21), the second preset force transmission point corresponding to the position of one of the reinforcing partitions (23); The first web member (3) is an I-shaped web member or a box-shaped web member; When the first web member (3) is a box-type web member, the first web member (3) further comprises a first inner web plate (32), and the first inner web plate (32) is connected to the inner flange plate (21) after being bent; The first inner web (32) is connected to a third preset force transmission point of the inner flange plate (21), and the third preset force transmission point corresponds to the position of a node partition (24) of the chord (2); A stiffening plate (241) is provided at a third preset force transmission point of the inner flange plate (21), and the first inner web plate (32) is connected to the inner flange plate (21) via the stiffening plate (241); A first web partition (33) is provided between the first inner web (32) and the first web (31). The first web partition (33) extends radially from the bending point of the first inner web (32) and is connected to the first web (31).

2. The welding node according to claim 1, characterized in that: The second web member (4) is an I-shaped web member.

3. The welded joint according to claim 2, wherein: At least one sealing plate (11) is provided inside each of the first web member (3) and the second web member (4).

4. The welded joint according to claim 1, wherein: The second web member (4) is a box-type web member, and the second web member (4) further comprises a second inner web plate (42). The second web member (4) is connected to the inner flange plate (21) after being bent.

5. A steel truss beam, characterized in that: include: At least two welding nodes arranged vertically, the welding nodes comprising: A chord (2), comprising an inner flange plate (21) and an outer flange plate (22), wherein two reinforcing partition plates (23) are provided between the inner flange plate (21) and the outer flange plate (22); Two node plates (1) spaced apart in the transverse direction of the bridge, the two node plates (1) being arranged on the chord rod (2); a first web member (3) connected to the node plate (1), comprising at least one first web plate (31), wherein the first web plate (31) extends in a length direction and is connected to a first preset force transmission point of the inner flange plate (21), wherein the first preset force transmission point corresponds to a position of a reinforcement partition plate (23); a second web member (4) connected to the node plate (1), comprising at least one second web plate (41), the second web plate (41) extending in the length direction and connected to a second preset force transmission point of the inner flange plate (21), the preset force transmission point corresponding to the position of one of the reinforcing partitions (23); The first web member (3) is an I-shaped web member or a box-shaped web member; When the first web member (3) is a box-type web member, the first web member (3) further comprises a first inner web plate (32), and the first inner web plate (32) is connected to the inner flange plate (21) after being bent; The first inner web (32) is connected to a third preset force transmission point of the inner flange plate (21), and the third preset force transmission point corresponds to the position of a node partition (24) of the chord (2); A stiffening plate (241) is provided at a third preset force transmission point of the inner flange plate (21), and the first inner web plate (32) is connected to the inner flange plate (21) via the stiffening plate (241); A first web partition (33) is provided between the first inner web (32) and the first web (31). The first web partition (33) extends radially from the bending point of the first inner web (32) and is connected to the first web (31).

6. The steel truss beam according to claim 5, characterized in that: The second web member (4) is a box-shaped web member or an I-shaped web member.

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