CN114211150B - Node welding method for double-layer truss bridge - Google Patents
Node welding method for double-layer truss bridge Download PDFInfo
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- CN114211150B CN114211150B CN202111656052.0A CN202111656052A CN114211150B CN 114211150 B CN114211150 B CN 114211150B CN 202111656052 A CN202111656052 A CN 202111656052A CN 114211150 B CN114211150 B CN 114211150B
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- 238000003466 welding Methods 0.000 title claims abstract description 191
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005192 partition Methods 0.000 claims description 36
- 230000035515 penetration Effects 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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Abstract
The application discloses a node welding method of a double-layer truss bridge. The method is suitable for the technical field of steel structure bridges, and comprises a welding method of an upper chord member and a lower chord member of a double-layer truss bridge.
Description
Technical Field
The application belongs to the technical field of steel structure bridges, and particularly relates to a node welding method of a double-layer truss bridge.
Background
The welding seams at the joints of the double-layer truss bridge are dense, the quantity of penetration welding seams is large, the filling quantity of deposited metal is large, the welding deformation quantity is large and is not easy to control, and the control of the geometric accuracy of the rod piece of the steel structure bridge is directly affected.
Disclosure of Invention
The technical problem that the welding quality of the node of the current steel structure bridge is poor can be solved to a certain extent at least. For this reason, the application provides a node welding method of a double-layer truss bridge.
The technical scheme of the application is as follows:
the application provides a node welding method of a double-layer truss bridge, which comprises the following steps:
welding an upper chord;
welding a lower chord;
connecting the top of the lower chord with the bottom of the rib, and then connecting the top of the rib with the bottom of the upper chord to form a supporting structure which is integrally used as a double-layer truss bridge;
wherein, the welding of the upper chord includes:
arranging first top plates in parallel, vertically arranging a plurality of first partition plates at intervals on the top of the first top plates along the length direction of the first top plates, vertically arranging two first side plates at two ends of the first top plates in the width direction of the first top plates in opposite directions, arranging a plurality of first partition plates between the two first side plates, welding the first partition plates with the first side plates by vertical fillet welding, welding the first top plates with the first side plates by horizontal fillet welding, and welding the first top plates with the first partition plates by horizontal fillet welding;
arranging a first bottom plate on the top of the first partition plate in parallel, wherein the first bottom plate is positioned between the two first side plates, and welding the first bottom plate and the first side plates by adopting flat fillet welding;
the first rib plates are vertically arranged at the top of the first bottom plate, the first rib plates are positioned between the two first side plates, and the first rib plates are welded with the first side plates by vertical fillet welding;
two first short joint webs are respectively and vertically arranged at two ends of the first top plate in the width direction, the two first short joint webs are respectively positioned outside the two first side plates, the first short joint webs are welded with the first side plates by vertical fillet welding, the first short joint webs are welded with the first top plate by flat fillet welding,
arranging two first short joint wing plates in parallel at the top of the first short joint web plate respectively, wherein the two first short joint wing plates are positioned outside the two first side plates respectively, and welding the first short joint wing plates and the first side plates by adopting flat angle welding;
and rotating the structure formed according to the steps by 180 degrees by taking the axis along the length direction of the first top plate as a rotation axis, welding the first bottom plate with the first side plate by adopting flat fillet welding, welding the first partition plate with the first bottom plate by adopting flat fillet welding, and welding the first short joint web plate with the first short joint wing plate by adopting flat fillet welding.
Further, a plurality of first web shorting plates are vertically arranged on opposite sides of the two first side plates, and the first web shorting plates are welded with the first side plates by fillet welding.
Further, the first side plate and the first top plate are welded in a partial penetration flat fillet welding mode.
Further, the welding mode adopted by the first short joint web plate and the first side plate is partial penetration vertical fillet welding.
Further, the welding mode adopted by the first short joint web plate and the first top plate is partial penetration flat fillet welding.
Further, the bottom chord welding includes:
arranging a second bottom plate in parallel, vertically arranging a plurality of second partition plates at the top of the second bottom plate at intervals along the length direction of the second bottom plate, vertically arranging two second side plates at two ends of the width direction of the second bottom plate in opposite directions respectively, arranging a plurality of second partition plates between the two second side plates, welding the second partition plates with the second side plates by vertical fillet welding, welding the second bottom plate with the second side plates by horizontal fillet welding, and welding the second bottom plate with the second partition plates by horizontal fillet welding;
two second short joint webs are respectively and vertically arranged at two ends of the second bottom plate in the width direction, the two second short joint webs are positioned outside the two second side plates, the second short joint webs are welded with the second side plates by vertical fillet welding, and the second short joint webs are welded with the second bottom plate by flat fillet welding;
arranging a second top plate on the top of the second partition plate in parallel, wherein the second top plate is positioned between the two second side plates, and welding the second top plate and the second side plates by adopting flat fillet welding;
arranging two second short joint wing plates in parallel at the top of the second short joint web plate respectively, wherein the two second short joint wing plates are positioned outside the two second side plates, and welding the second short joint wing plates and the second side plates by adopting flat angle welding;
the second rib plates are vertically arranged at the top of the second top plate, are positioned between the two second side plates, and are welded with the second side plates by vertical fillet welding;
rotating the structure formed according to the steps by 180 degrees by taking the axis along the length direction of the second bottom plate as a rotating shaft, and welding the second top plate and the second partition plate by adopting flat fillet welding;
and rotating the structure formed according to the steps by 180 degrees by taking the axis along the length direction of the second bottom plate as a rotating shaft, and welding the second short joint wing plate and the second short joint web plate by adopting flat angle welding.
Further, a plurality of second web member shorting plates are vertically disposed on opposite sides of the two second side plates, and the second web member shorting plates are welded to the second side plates by fillet welding.
Further, the welding mode adopted by the second side plate and the second bottom plate is partial penetration flat fillet welding.
Further, the welding mode adopted by the second short joint web plate and the second side plate is partial penetration vertical fillet welding.
Further, the welding mode adopted by the second short joint web plate and the second bottom plate is partial penetration flat fillet welding.
The embodiment of the application has at least the following beneficial effects:
the welding method for the nodes of the double-layer truss bridge comprises the steps of welding the upper chord member and the lower chord member of the double-layer truss bridge, and can improve the welding quality of each node, effectively control welding deformation, shorten the adjustment construction period and reduce the manufacturing cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of an upper chord according to an embodiment of the present application;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of a bottom chord in accordance with an embodiment of the present application;
fig. 4 is a sectional view of B-B of fig. 3.
Reference numerals:
100-upper chords; 110-a first top plate; 120-a first separator; 130-a first side plate; 131-a first gusset; 132—a first web; 140-a first bottom plate; 150-a first rib plate; 160-a first short tab web; 170-a first short tab flap; 180-first web shorting plate; 200-bottom chords; 210-a second top plate; 220-a second separator; 230-a second side plate; 231-a second gusset; 232-a second web; 240-a second floor; 250-second rib plates; 260-a second short tab web; 270-a second short tab; 280-second web shorting plate.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings:
on the double-layer truss bridge, the supporting structure is formed by connecting an upper chord member 100, a rib rod and a lower chord member 200, and the welding of the joints of the upper chord member 100 and the lower chord member 200 is the key joint welding of the double-layer truss bridge.
Fig. 1 and 2 are schematic structural views of an upper chord 100, and in combination with fig. 1 and 2, the upper chord 100 includes an upper chord 100, a first top plate 110, a first partition 120, a first side plate 130, a first bottom plate 140, a first inter-rib plate 150, a first short tab web 160, a first short tab plate 170, and a first web member short tab plate 180, wherein the first side plate 130 includes a first node plate 131 and a first web member 132.
Fig. 3 and 4 are schematic structural views of the bottom chord 200, and in combination with fig. 3 and 4, the bottom chord 200, the second top plate 210, the second partition 220, the second side plate 230, the second bottom plate 240, the second inter-rib plate 250, the second short tab web 260, the second short tab wing 270, and the second web member short tab plate 280, wherein the second side plate 230 includes the second node plate 231 and the second web member 232.
The node welding method of the double-layer truss bridge provided by the embodiment of the application comprises the following steps:
s10: welding the upper chord 100;
s20: welding the lower chord 200;
s30: the top of the lower chord 200 is connected to the bottom of the rib and then the top of the rib is connected to the bottom of the upper chord 100 to form a support structure that is integrally formed as a double truss bridge.
By the method, the welding quality of key node welding seams of the double-layer truss bridge can be improved, welding deformation is effectively controlled, the construction period is shortened and the manufacturing cost is reduced.
Specifically, the welding of the upper chord 100 includes:
s11: arranging the first top plates 110 in parallel, arranging a plurality of first partition plates 120 at the top of the first top plates 110 at vertical intervals along the length direction of the first top plates 110, arranging two first side plates 130 at two ends of the first top plates 110 in the width direction in a vertically opposite manner respectively, arranging the plurality of first partition plates 120 between the two first side plates 130, welding the first partition plates 120 and the first side plates 130 by vertical fillet welding, welding the first top plates 110 and the first side plates 130 by horizontal fillet welding, and welding the first top plates 110 and the first partition plates 120 by horizontal fillet welding;
s12: the first bottom plate 140 is arranged in parallel on top of the first partition 120 with the first bottom plate 140 between the two first side plates 130, and the first bottom plate 140 is welded with the first side plates 130 by flat fillet welding;
s13: vertically arranging first inter-rib plates 150 on the top of the first bottom plate 140, wherein the first inter-rib plates 150 are positioned between the two first side plates 130, and welding the first inter-rib plates 150 and the first side plates 130 by vertical fillet welding;
s14: two first short joint webs 160 are vertically arranged at two ends of the first top plate 110 in the width direction, the two first short joint webs 160 are respectively positioned outside the two first side plates 130, the first short joint webs 160 are welded with the first side plates 130 by vertical fillet welding, the first short joint webs 160 are welded with the first top plate 110 by flat fillet welding,
s15: arranging two first short joint wing plates 170 in parallel at the top of the first short joint web 160 respectively, wherein the two first short joint wing plates 170 are positioned outside the two first side plates 130 respectively, and welding the first short joint wing plates 170 with the first side plates 130 by adopting flat angle welding;
s16: the structure formed in the above steps is rotated 180 ° about the axis along the longitudinal direction of the first top plate 110, the first bottom plate 140 is welded to the first side plate 130 by flat fillet welding, the first separator 120 is welded to the first bottom plate 140 by flat fillet welding, and the first short tab web 160 is welded to the first short tab wing 170 by flat fillet welding.
S17: a plurality of first web shorting plates 180 are vertically disposed on opposite sides of the two first side plates 130, and the first web shorting plates 180 are welded to the first side plates 130 using fillet welding.
By the specific method for welding the upper chord member 100, the upper chord member 100 is welded and formed, so that the welding quality can be improved, the welding deformation can be controlled, and the control of the geometric accuracy of the rod piece of the double-layer truss bridge can be ensured.
In this embodiment, the welding mode adopted by the first side plate 130 and the first top plate 110 is partial penetration flat fillet welding, the welding mode adopted by the first short joint web 160 and the first side plate 130 is partial penetration vertical fillet welding, and the welding mode adopted by the first short joint web 160 and the first top plate 110 is partial penetration flat fillet welding, so as to ensure the welding quality of the upper chord member 100.
Specifically, the welding of the lower chord 200 includes:
s21: arranging the second bottom plates 240 in parallel, arranging a plurality of second partition plates 220 at the top of the second bottom plates 240 at vertical intervals along the length direction of the second bottom plates 240, arranging two second side plates 230 at two ends of the second bottom plates 240 in the width direction in a vertically opposite manner respectively, arranging the plurality of second partition plates 220 between the two second side plates 230, welding the second partition plates 220 with the second side plates 230 by vertical angle welding, welding the second bottom plates 240 with the second side plates 230 by horizontal angle welding, and welding the second bottom plates 240 with the second partition plates 220 by horizontal angle welding;
s22: two second short joint webs 260 are respectively vertically arranged at two ends of the second bottom plate 240 in the width direction, the two second short joint webs 260 are positioned outside the two second side plates 230, the second short joint webs 260 are welded with the second side plates 230 by vertical angle welding, and the second short joint webs 260 are welded with the second bottom plate 240 by flat angle welding;
s23: the second top plate 210 is disposed in parallel on top of the second partition 220 with the second top plate 210 between the two second side plates 230, and the second top plate 210 is welded with the second side plates 230 using flat fillet welding;
s24: arranging two second short joint wing plates 270 in parallel at the top of the second short joint web plate 260, wherein the two second short joint wing plates 270 are positioned outside the two second side plates 230, and welding the second short joint wing plates 270 with the second side plates 230 by adopting flat angle welding;
s25: the second spacer rib plates 250 are vertically arranged at the top of the second top plate 210, the second spacer rib plates 250 are positioned between the two second side plates 230, and the second spacer rib plates 250 are welded with the second side plates 230 by vertical fillet welding;
s26: the structure formed in the above steps is rotated 180 ° about an axis along the length direction of the second bottom plate 240, and the second top plate 210 is welded to the second separator 220 by flat fillet welding;
s27: the structure formed in the above steps is rotated 180 ° about an axis along the length direction of the second bottom plate 240, and the second short tab wing 270 is welded to the second short tab web 260 by flat fillet welding.
S28: a plurality of second web shorting plates 280 are disposed vertically on opposite sides of the two second side plates 230, and the second web shorting plates 280 are welded to the second side plates 230 using fillet welding.
By the specific method for welding the lower chord member 200, the lower chord member 200 is welded and formed, so that the welding quality can be improved, the welding deformation can be controlled, and the control of the geometric accuracy of the rod piece of the double-layer truss bridge can be ensured.
In this embodiment, the welding mode adopted by the second side plate 230 and the second bottom plate 240 is partial penetration flat fillet welding, the welding mode adopted by the second short joint web 260 and the second side plate 230 is partial penetration vertical fillet welding, and the welding mode adopted by the second short joint web 260 and the second bottom plate 240 is partial penetration flat fillet welding, so as to ensure the welding quality of the lower chord member 200.
The welding method for the nodes of the double-layer truss bridge comprises the steps of welding the upper chord member and the lower chord member of the double-layer truss bridge, and can improve the welding quality of each node, effectively control welding deformation, shorten the adjustment construction period and reduce the manufacturing cost.
In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise" indicate or positional relationships are based on the positional relationships shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.
In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In addition, descriptions such as those related to "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in this application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A method of node welding a double-layered truss bridge, the method comprising:
welding an upper chord (100);
welding a lower chord (200);
connecting the top of the lower chord (200) with the bottom of the rib, and then connecting the top of the rib with the bottom of the upper chord (100) to form a support structure integrally serving as a double-layer truss bridge;
wherein the welding of the upper chord (100) comprises:
arranging first top plates (110) in parallel, arranging a plurality of first partition plates (120) at the top of the first top plates (110) at intervals vertically along the length direction of the first top plates (110), arranging two first side plates (130) at two ends of the first top plates (110) in the width direction vertically opposite to each other, arranging a plurality of first partition plates (120) between the two first side plates (130), welding the first partition plates (120) with the first side plates (130) by vertical fillet welding, welding the first top plates (110) with the first side plates (130) by horizontal fillet welding, and welding the first top plates (110) with the first partition plates (120) by horizontal fillet welding;
arranging a first bottom plate (140) in parallel on the top of the first partition plate (120), wherein the first bottom plate (140) is positioned between the two first side plates (130), and the first bottom plate (140) and the first side plates (130) are welded by adopting flat fillet welding;
vertically arranging a first inter-rib plate (150) at the top of the first bottom plate (140), wherein the first inter-rib plate (150) is positioned between the two first side plates (130), and welding the first inter-rib plate (150) and the first side plates (130) by vertical fillet welding;
two first short joint webs (160) are respectively and vertically arranged at two ends of the first top plate (110) in the width direction, the two first short joint webs (160) are respectively positioned outside the two first side plates (130), the first short joint webs (160) are welded with the first side plates (130) by vertical fillet welding, and the first short joint webs (160) are welded with the first top plate (110) by horizontal fillet welding;
arranging two first short joint wing plates (170) in parallel at the top of the first short joint web plate (160), wherein the two first short joint wing plates (170) are respectively positioned outside the two first side plates (130), and welding the first short joint wing plates (170) and the first side plates (130) by adopting flat fillet welding;
rotating the structure formed according to the above steps by 180 degrees with an axis along the length direction of the first top plate (110) as a rotation axis, welding the first bottom plate (140) and the first side plate (130) by adopting flat fillet welding, welding the first partition plate (120) and the first bottom plate (140) by adopting flat fillet welding, and welding the first short joint web (160) and the first short joint wing plate (170) by adopting flat fillet welding;
the welding of the lower chord (200) comprises:
arranging a second bottom plate (240) in parallel, arranging a plurality of second partition plates (220) at the top of the second bottom plate (240) at intervals vertically along the length direction of the second bottom plate (240), arranging two second side plates (230) at two ends of the second bottom plate (240) in the width direction respectively vertically opposite to each other, arranging the plurality of second partition plates (220) between the two second side plates (230), welding the second partition plates (220) with the second side plates (230) by vertical fillet welding, welding the second bottom plate (240) with the second side plates (230) by horizontal fillet welding, and welding the second bottom plate (240) with the second partition plates (220) by horizontal fillet welding;
two second short joint webs (260) are respectively and vertically arranged at two ends of the second bottom plate (240) in the width direction, the two second short joint webs (260) are positioned outside the two second side plates (230), the second short joint webs (260) are welded with the second side plates (230) by vertical fillet welding, and the second short joint webs (260) are welded with the second bottom plate (240) by horizontal fillet welding;
arranging a second top plate (210) on the top of the second partition plate (220) in parallel, wherein the second top plate (210) is positioned between two second side plates (230), and the second top plate (210) and the second side plates (230) are welded by adopting flat fillet welding;
arranging two second short joint wing plates (270) in parallel at the top of the second short joint web plate (260), wherein the two second short joint wing plates (270) are positioned outside the two second side plates (230), and welding the second short joint wing plates (270) with the second side plates (230) by adopting flat angle welding;
the second rib plates (250) are vertically arranged at the top of the second top plate (210), the second rib plates (250) are positioned between the two second side plates (230), and the second rib plates (250) are welded with the second side plates (230) by vertical fillet welding;
rotating the structure formed in the above steps by 180 degrees with an axis along the length direction of the second bottom plate (240) as a rotation axis, and welding the second top plate (210) and the second partition plate (220) by flat fillet welding;
and (3) rotating the structure formed according to the steps by 180 degrees by taking the axis along the length direction of the second bottom plate (240) as a rotation axis, and welding the second short joint wing plate (270) and the second short joint web plate (260) by adopting flat angle welding.
2. The method of welding nodes of a double-layered truss bridge according to claim 1, wherein a plurality of first web shorting plates (180) are vertically disposed on opposite sides of two of the first side plates (130), and the first web shorting plates (180) are welded to the first side plates (130) using fillet welding.
3. The method of welding a node of a double-layered truss bridge according to claim 1, wherein the first side plate (130) and the first top plate (110) are welded by means of partial penetration flat fillet welding.
4. The method of welding a node of a double-layered truss bridge according to claim 1, wherein the first short tab web (160) and the first side plate (130) are welded by means of partial penetration fillet welding.
5. The method of welding a node of a double-layered truss bridge according to claim 1, wherein the first short tab web (160) and the first top plate (110) are welded by partial penetration fillet welding.
6. The method of welding nodes of a double-layered truss bridge according to claim 1, wherein a plurality of second web shorting plates (280) are vertically disposed on opposite sides of two of the second side plates (230), and the second web shorting plates (280) are welded to the second side plates (230) using fillet welding.
7. The method for welding the nodes of the double-layered truss bridge according to claim 1, wherein the welding mode adopted by the second side plate (230) and the second bottom plate (240) is partial penetration flat fillet welding.
8. The method of welding a node of a double-layered truss bridge according to claim 1, wherein the welding between the second short tab web (260) and the second side plate (230) is a partial penetration fillet weld.
9. The method of welding a node of a double-layered truss bridge according to claim 1, wherein the welding between the second short tab web (260) and the second bottom plate (240) is a partial penetration fillet weld.
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