CN210712558U - Orthotropic steel bridge deck structure with full-belly type inner partition plate - Google Patents

Orthotropic steel bridge deck structure with full-belly type inner partition plate Download PDF

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Publication number
CN210712558U
CN210712558U CN201921099253.3U CN201921099253U CN210712558U CN 210712558 U CN210712558 U CN 210712558U CN 201921099253 U CN201921099253 U CN 201921099253U CN 210712558 U CN210712558 U CN 210712558U
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partition plate
longitudinal rib
closed longitudinal
transverse
plate
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祝志文
王钦华
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Shantou University
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Shantou University
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Abstract

The utility model discloses an orthotropic steel bridge deck structure with a full-belly type inner baffle, which consists of a deck, a closed longitudinal rib, a transverse baffle and an inner baffle, wherein the closed longitudinal rib is along the bridge direction, the transverse bridge direction of the transverse baffle is along the bridge direction, the deck is a common upper flange of the closed longitudinal rib and the transverse baffle, and the closed longitudinal rib and the bottom surface of the deck are welded to form a groove-shaped longitudinal rib abdominal cavity; the diaphragm plate is vertical to the closed longitudinal ribs and is welded with the bottom surface of the panel, and a notch for the closed longitudinal ribs to pass through is reserved on the diaphragm plate; the inner partition plate is welded in the abdominal cavity of the longitudinal rib in the plane of the transverse partition plate, the shape of the inner partition plate is matched with the inner contour of the cross section of the closed longitudinal rib, the thickness of the inner partition plate is consistent with that of the upper transverse partition plate, and the thickness of the upper transverse partition plate is larger than that of the lower transverse partition plate. In the disclosed orthotropic steel bridge deck structure, the full-belly type inner partition plate is arranged in the closed longitudinal rib, and the inner partition plate and the transverse partition plate on the outer side of the closed longitudinal rib have the same thickness and correspond to each other in position, so that the buckling deformation and the Poisson effect of the longitudinal rib can be greatly reduced, and the fatigue stress amplitude of the tail end of the welding seam for connecting the closed longitudinal rib and the transverse partition plate is obviously reduced.

Description

Orthotropic steel bridge deck structure with full-belly type inner partition plate
Technical Field
The utility model relates to a bridge design, manufacturing and construction technical field, in particular to take orthotropic steel bridge deck structure of full abdomen formula inner baffle.
Background
Orthotropic steel bridge deck slabs were used in german bridge construction in the middle of the last century, and this steel bridge deck structure has been the preferred form of steel bridge, especially large span bridge, for many years. After decades of engineering practice, the stiffening rib structure of orthotropic steel bridge deck slab has roughly three types, namely: (1) a closed rib structure; (2) an open rib structure; (3) closed rib structures with non-full webbing internal baffles or ribs. Simple closed rib and open rib configurations typically develop fatigue cracks at the longitudinal rib-diaphragm joint welds. To ameliorate this problem, non-full-web internal partitions or ribs have been introduced into closed rib structures, but this approach has resulted in new fatigue details at the ends of the welds connecting the internal partitions or ribs to the longitudinal rib webs, causing cracks to propagate to the longitudinal rib webs or partitions and longitudinal ribs.
Under the action of wheel load, the stress level of the diaphragm details of the longitudinal rib-diaphragm connecting welding line and the diaphragm arc-shaped cut parent metal details is high, and fatigue cracking is easily caused. The stress level of the details can be effectively reduced by increasing the thickness of the transverse partition plate, but the increase of the thickness of the whole transverse partition plate is not beneficial to the stress deformation of the steel box girder and is not economical.
The thin thickness of the orthotropic steel deck slab usually causes damage to the bridge deck pavement, thereby increasing the impact effect of vehicle loads and further increasing the stress level of fatigue details of the steel deck slab. To deal with this problem, the existing solutions are to increase the thickness of the deck or to adopt composite bridge deck pavement, improving the rigidity of the deck slab. The idea is that the wheel load is dispersed to a larger range of structures, and although the wheel load can play a certain role, the problem that the local effect of the orthotropic steel bridge deck is prominent under the action of the wheel load cannot be changed. The stress amplitude reduction level is limited, especially for construction details far from the panel. Therefore, the method cannot completely solve the problem of fatigue cracking of the construction details of the orthotropic steel bridge deck slab and is high in cost.
Disclosure of Invention
The technical scheme aims to provide the orthotropic steel bridge deck structure with the full-belly type inner partition plate, and the problem of fatigue cracking of structural details of the traditional orthotropic steel bridge deck structure under the action of vehicle load can be solved.
An orthotropic steel bridge deck structure with a full-belly type inner baffle plate comprises a deck plate, closed longitudinal ribs, a transverse baffle plate and the inner baffle plate, wherein the closed longitudinal ribs are arranged along the bridge direction, the transverse baffle plate is arranged along the bridge direction, the deck plate is an upper wing edge shared by the closed longitudinal ribs and the transverse baffle plate, and the closed longitudinal ribs and the bottom surface of the deck plate are welded to form a groove-shaped longitudinal rib belly; the diaphragm plate is vertical to the closed longitudinal ribs and is welded with the bottom surface of the panel, and a notch for the closed longitudinal ribs to pass through is reserved on the diaphragm plate; the inner partition plate is welded in the abdominal cavity of the longitudinal rib in the plane of the transverse partition plate, the shape of the inner partition plate is matched with the inner contour of the cross section of the closed longitudinal rib, and the thickness of the inner partition plate is consistent with that of the transverse partition plate.
Further, the clearance between the top surface of the inner partition plate and the panel is 0.5 mm.
Furthermore, the cross section of the closed longitudinal rib is in an isosceles trapezoid shape with a large upper part and a small lower part, and the ratio of the upper bottom to the lower bottom to the height of the trapezoid cross section is (28-32): (17-19): (28-30).
Furthermore, the upper ends of the left side and the right side of the notch are both arc-shaped.
Further, the transverse partition plate consists of an upper transverse partition plate and a lower transverse partition plate, the thickness of the upper transverse partition plate is greater than that of the lower transverse partition plate, and the thickness of the inner partition plate is consistent with that of the upper transverse partition plate. The upper transverse clapboard and the lower transverse clapboard are welded through fusion through a groove.
In the disclosed orthotropic steel bridge deck structure, the closed longitudinal rib is internally provided with the full-belly type inner partition plate, and the inner partition plate and the transverse partition plate on the outer side of the closed longitudinal rib have the same thickness and correspond to each other in position, so that the bending stress at the tail end of the welding seam for connecting the closed longitudinal rib and the transverse partition plate can be greatly reduced. Since the shape of the inner partition is adapted to the inner contour of the cross-section of the closed longitudinal rib, the inner partition needs to be welded into the closed longitudinal rib before the welding fixation of the closed longitudinal rib and the panel.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.
FIG. 1 is a schematic structural diagram of an orthotropic steel deck plate structure with full-belly inner spacers according to example 1;
FIG. 2 is a schematic view of the closed longitudinal rib-panel weld joint connection at A of FIG. 1;
FIG. 3 is a schematic view of the closed longitudinal rib-diaphragm weld joint at B in FIG. 1;
fig. 4 is an assembly flow chart of the orthotropic steel deck plate structure.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and the embodiments of the present invention, and other embodiments obtained by those skilled in the art without inventive labor all belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Example 1: as shown in fig. 1, an orthotropic steel bridge deck structure with a full-belly type inner partition plate comprises a deck 001, a closed longitudinal rib 005, a transverse partition plate and an inner partition plate 008, wherein the closed longitudinal rib 005 is along the bridge direction, the transverse partition plate is along the bridge direction, the deck 001 is an upper flange shared by the closed longitudinal rib 005 and the transverse partition plate, and the closed longitudinal rib 005 and the bottom surface of the deck 001 are welded to form a groove-shaped longitudinal rib abdominal cavity; the diaphragm plate is perpendicular to the closed longitudinal rib 005 and is welded to the bottom surface of the panel 001. The cross section of the closed longitudinal rib 005 is in an isosceles trapezoid with a large upper part and a small lower part, the upper opening is 300mm wide, the lower end is 180mm wide, the height is 290mm, and the thickness is 8 mm. Transverse direction of longitudinal ribThe cardiac spacing was 600 mm. The isosceles trapezoid closed longitudinal ribs are formed by cold bending, and the radius R of the inner side of each closed longitudinal rib140mm, outside radius R248mm to avoid excessive impact of cold-bending plastic deformation on toughness. The panel 001 is up to 18mm thick, which is thicker than existing 14mm or 16mm designs. When the thickness of the deck slab is increased, the rigidity of the whole deck structure can be improved, the obvious effect on reducing the stress level of the closed longitudinal rib-deck slab weld joint details is achieved, the damage of deck pavement caused by fatigue cracking of the construction details can be effectively avoided, and each component of the orthotropic steel deck slab can better cooperatively bear the wheel load effect.
The diaphragm plate comprises last diaphragm plate 002 and lower diaphragm plate 003, go up diaphragm plate 002 height and be 600mm, thickness is 16 mm. The thickness of the lower diaphragm plate 003 is 10 mm. The diaphragm plates in the prior art are all one-piece and same in thickness and are thinner, so that under the action of wheel load, the stress level of the side details of the diaphragm plate of the closed longitudinal rib-diaphragm plate welding line and the side details of the base material of the diaphragm plate cut is higher, and fatigue cracking is easily caused. The utility model discloses divide into horizontal cross slab 002 and lower cross slab 003 two parts with the cross slab, need connect upper and lower two parts as whole through the penetration welding when the decking preparation. The utility model discloses do the thickening to last horizontal dividing plate 002, can reduce effectively and close the stress level of the horizontal dividing plate side detail of longitudinal rib-horizontal dividing plate welding seam and horizontal dividing plate incision parent metal detail, reduce fatigue cracking risk.
As shown in fig. 3, the upper horizontal partition 002 is provided with a slit 004. The upper ends 006 of the left side and the right side of the notch 004 are both arc-shaped, and the radius of the arc is 34 mm. The lower end of the cut 004 is designed to be a circular arc around a corner 007 at the closed longitudinal rib 005, and the radius of the circular arc at the outer edge of the corner 007 is 115 mm. Each arc edge is connected with the straight edge in a tangent mode. The height H of the slit 004 in the longitudinal rib web direction is 110mm, and the slit clearance L is 74 mm. The free edge of the cut 004 is required to be polished smooth, and the edge smoothness is not more than 0.025mm, so that stress concentration is reduced, and the cracking risk is reduced.
The inner partition plate 008 is fixedly connected in a longitudinal rib abdominal cavity, the shape of the inner partition plate 008 is matched with the inner contour of the cross section of the closed longitudinal rib 005, the gap between the inner partition plate 008 and the panel 001 meets the requirement of polishing and jacking, and the gap is not more than 0.5 mm. The thickness of the inner clapboard 008 is the same as that of the upper clapboard 002 and is in the same plane. The inner partition plate 008 can greatly reduce the bending stress of the longitudinal rib detail at the tail end of the closed longitudinal rib-diaphragm plate connecting weld joint.
Further, the assembly of the orthotropic steel bridge deck structure with the full-belly type inner partition plate according to the flow shown in fig. 4 can be specifically divided into the following 5 steps:
s1, welding the inner partition plate 008 and the closed longitudinal rib 005. Since the internal partitions 008 are located inside the closed longitudinal ribs, the internal partitions 008 are installed first. In the construction, the standard forming of the closed longitudinal rib 005 needs to be considered, and the inner partition plate 008 is precisely blanked. The thickness of the inner partition plate 008 is the same as that of the upper cross partition plate 002, and it is ensured that the inner partition plate 008 is aligned with the corresponding upper cross partition plate 002 in the longitudinal bridge direction during installation, so that the inner partition plate 008 can really play a role. The inner spacer 008 is connected to the closed longitudinal rib 005 by a double-sided fillet weld of 6mm in fillet dimension.
S2, welding the closed longitudinal ribs 005 with the panel 001. Since the panel 001 is in direct contact with the vehicle load, the quality of the weld there directly affects the fatigue performance of the construction details. The welding seams of the closed longitudinal rib-panel are welded on the inner side and the outer side in a double-sided mode, and the total penetration rate of the welding of the longitudinal rib web is controlled to be not lower than 60%. The assembling of the closed longitudinal rib 005 and the panel 001 also controls the gap between the closed longitudinal rib 005 and the panel 001, so as to avoid the phenomenon that the root of the closed longitudinal rib 005 burns out due to the large assembling gap in the welding process, thereby causing internal welding defects. The gap is required to be no more than 0.5mm, as shown in fig. 2. And after the closed longitudinal rib-panel welding is finished, the fillet size of the fillet weld is 8 mm. The upper horizontal partition slit may be formed simultaneously with step S2 or may be formed at step S1.
S3, welding the closed longitudinal ribs 005, the panel 001 and the upper transverse partition plate 002. At the intersection of the panel 001, the closed longitudinal rib 005 and the upper transverse partition 002, the local part of the upper transverse partition 002 is firstly processed into a chamfer of 10mm × 10mm, after each plate is in place, the upper transverse partition 002 is welded with the panel 001 and the closed longitudinal rib 005 by adopting continuous groove welding, the lowest end of the upper transverse partition 002 is girth welding, and the part is filled, so that the fatigue resistance of the part is improved. Because the closed longitudinal ribs 005 have errors in the assembly of the panel 001 and the upper transverse partition plate 002 has certain errors in the cutting, in order to ensure the smooth assembly of the upper transverse partition plate 002 and the closed longitudinal ribs 005, a process gap of 2mm is reserved in the longitudinal rib notches of the upper transverse partition plate 002. And after the welding of the closed longitudinal rib and the transverse clapboard is finished, the fillet size of the fillet weld is 8 mm.
S4, welding the closed longitudinal ribs 005 with the upper transverse partition board 002, welding the lower end in a surrounding mode and polishing. The notch 004 adopts a tangent transition connection mode at the tail end of the welding seam of the closed longitudinal rib-diaphragm plate, and the dimension of the girth welding in the direction of the web plate of the longitudinal rib is 8mm, as shown in figure 3. After welding is completed, the tail end of the welding line needs to be polished smoothly so as to reduce stress concentration under the action of wheel load.
S5, fusion penetration butt welding of the grooves of the upper transverse clapboard and the lower transverse clapboard. In order to avoid the phenomenon that welding quality is poor due to the fact that welding is conducted upwards during welding of the transverse partition plates, the upper transverse partition plate 002 is well welded with the closed longitudinal ribs 005 and the panel 001, and then the upper transverse partition plate 002 and the lower transverse partition plate 003 are connected into a whole through fusion welding of the groove.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims (6)

1. The orthotropic steel bridge deck structure with the full-belly type inner partition plate is characterized by comprising a deck plate, closed longitudinal ribs, transverse partition plates and the inner partition plate, wherein the closed longitudinal ribs are arranged along the bridge direction, the transverse partition plates are arranged along the bridge direction, the deck plate is an upper wing edge shared by the closed longitudinal ribs and the transverse partition plates, and the closed longitudinal ribs and the bottom surface of the deck plate are welded to form a groove-shaped longitudinal rib abdominal cavity; the diaphragm plate is vertical to the closed longitudinal ribs and is welded with the bottom surface of the panel, and a notch for the closed longitudinal ribs to pass through is reserved on the diaphragm plate; the inner partition plate is welded in the abdominal cavity of the longitudinal rib in the plane of the transverse partition plate, the shape of the inner partition plate is matched with the inner contour of the cross section of the closed longitudinal rib, and the thickness of the inner partition plate is consistent with that of the transverse partition plate.
2. The orthotropic steel bridge deck structure with a full-belly inner partition of claim 1, wherein: the clearance between the top surface of the inner partition plate and the panel is 0.5 mm.
3. The orthotropic steel bridge deck structure with a full-belly inner partition of claim 1, wherein: the cross section of the closed longitudinal rib is in an isosceles trapezoid shape with a large upper part and a small lower part, and the ratio of the upper bottom to the lower bottom to the height of the trapezoid cross section is (28-32): (17-19): (28-30).
4. The orthotropic steel bridge deck structure with a full-belly inner partition of claim 1, wherein: the upper ends of the left side and the right side of the notch are arc-shaped.
5. The orthotropic steel bridge deck structure with a full-belly inner partition of claim 1, wherein: the transverse partition plate consists of an upper transverse partition plate and a lower transverse partition plate, the thickness of the upper transverse partition plate is larger than that of the lower transverse partition plate, and the thickness of the inner partition plate is consistent with that of the upper transverse partition plate.
6. The orthotropic steel bridge deck structure with a full-belly inner partition of claim 5, wherein: the upper transverse clapboard and the lower transverse clapboard are welded through fusion through a groove.
CN201921099253.3U 2019-07-12 2019-07-12 Orthotropic steel bridge deck structure with full-belly type inner partition plate Active CN210712558U (en)

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Application Number Priority Date Filing Date Title
CN201921099253.3U CN210712558U (en) 2019-07-12 2019-07-12 Orthotropic steel bridge deck structure with full-belly type inner partition plate

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Application Number Priority Date Filing Date Title
CN201921099253.3U CN210712558U (en) 2019-07-12 2019-07-12 Orthotropic steel bridge deck structure with full-belly type inner partition plate

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112589234A (en) * 2020-12-01 2021-04-02 中铁宝桥(扬州)有限公司 Automatic welding process for diaphragm plate connecting plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112589234A (en) * 2020-12-01 2021-04-02 中铁宝桥(扬州)有限公司 Automatic welding process for diaphragm plate connecting plate

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