Transverse partition plate structure with upper vertical double supports and manufacturing method of transverse partition plate structure

Abstract

The invention relates to the technical field of bridge engineering, in particular to a diaphragm plate structure with upper vertical double supports and a manufacturing method of the diaphragm plate structure. A vertical double-supporting plate of the diaphragm plate structure is formed by connecting two relatively parallel vertical supporting plates through a double-supporting-plate stiffening rib, and the upper surface and the lower surface of a horizontal stiffening rib of a diaphragm plate are perpendicularly connected with the vertical double-supporting plate and the diaphragm plate respectively. The double-trapezoid stiffening supporting piece is arranged under the position of the double-supporting-plate stiffening rib of the vertical double-supporting plate and located at the included angle between the lower surface of the horizontal stiffening rib of the transverse partition plate and the transverse partition plate. By changing the structure of the diaphragm plate, under the condition that the steel consumption is kept unchanged, the stress at the notch can be effectively reduced, the stress concentration phenomenon is relieved, the bearing capacity of the structure is improved, the anti-fatigue performance at the notch of the diaphragm plate is improved, fatigue cracks are delayed, the stress performance is improved, and the service life of the diaphragm plate structure is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a diaphragm structure with upper vertical double supports and a manufacturing method thereof. Background Art

[0002] At present, with the increase in steel production and the maturity of steel structure construction technology, orthotropic steel box girder bridges are widely used in bridge engineering. Orthotropic steel box girder bridges have been widely used in countries around the world due to their advantages such as light weight, strong bearing capacity under limit state, and low steel usage. Orthotropic steel bridge decks are usually composed of steel bridge decks, longitudinal stiffening ribs, and diaphragms that support the longitudinal ribs. When vehicles pass by, the load is transmitted from the steel bridge deck to the longitudinal ribs, and then from the longitudinal ribs to the diaphragms. However, under the repeated load of vehicles, fatigue cracking is prone to occur at the stress concentration point of the arc-shaped cutout of the diaphragm, which greatly reduces the service life of the bridge.

[0003] The traditional solution to the fatigue cracking of diaphragms is to increase the thickness of the diaphragms and reduce the stress at the cutouts, thereby improving the fatigue resistance at the cutouts and delaying the occurrence of fatigue cracks. However, this method will significantly increase the amount of steel used, resulting in high project costs and poor economic efficiency.

[0004] Existing research also reduces the stress around the arc cutout by optimizing the shape of the arc cutout of the diaphragm. However, the stress state around the arc cutout is complex and the design is difficult. At present, most orthotropic steel box girders still use the arc cutout shape recommended by various national standards. The partially optimized arc cutout only reduces the stress at a local position, but has no obvious effect on reducing the overall stress around the arc cutout. It is also easy to cause the transfer of the original stress concentration point, which has limited improvement on the overall crack resistance of the diaphragm.

[0005] Therefore, it is necessary to propose a diaphragm structure and a manufacturing method thereof that can keep the overall steel consumption unchanged and effectively reduce the stress around the arc-shaped cutout. Summary of the invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a diaphragm structure with upper vertical double supports and a manufacturing method thereof. Without increasing the amount of steel used, by optimizing the structure of the diaphragm, the stress concentration phenomenon at the cutout of the diaphragm can be effectively alleviated to prevent fatigue cracks from occurring prematurely at the arc-shaped cutout of the diaphragm, thereby increasing the service life of the diaphragm and improving its bearing capacity.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A diaphragm structure with an upper vertical double support, the diaphragm structure consists of a vertical double support plate, a horizontal stiffening rib of the diaphragm, a double trapezoidal stiffening support, a diaphragm, and a double support plate stiffening rib. The specific structure is as follows: the vertical double support plate is composed of two relatively parallel vertical support plates connected by double support plate stiffening ribs, there are more than two double support plate stiffening ribs evenly arranged, and arc-shaped incisions are relatively opened on the vertical support plates between adjacent double support plate stiffening ribs; the upper and lower surfaces of the horizontal stiffening ribs of the diaphragm are vertically connected to the vertical double support plate and the diaphragm respectively, and the double trapezoidal stiffening support is arranged directly below the double support plate stiffening ribs of the vertical double support plate and at the angle between the lower surface of the horizontal stiffening rib of the diaphragm and the diaphragm.

[0009] The diaphragm structure with upper vertical double supports has vertical double support plates vertically fixed above the horizontal stiffening ribs of the diaphragm by welding.

[0010] In the diaphragm structure with upper vertical double supports, the double support plate stiffening ribs are vertically arranged on both sides of the arc-shaped cutout, and the distance from the edge of one side corresponding to the arc-shaped cutout is 100 mm.

[0011] In the transverse diaphragm structure with upper vertical double supports, each vertical support plate of the vertical double support plates has equal thickness.

[0012] The diaphragm structure with upper vertical double supports is vertically fixed by welding just below the center of the horizontal stiffening rib of the diaphragm. The diaphragm is located just below the center of the vertical double support plate and is parallel to the vertical double support plate.

[0013] The described diaphragm structure with upper vertical double supports, the double trapezoidal stiffening support members are vertical support surfaces, small trapezoidal stiffening plates, large trapezoidal stiffening plates, chamfers and horizontal support surfaces, which are made of steel one-piece forming technology, and the specific structure is as follows: the vertical support surface and the horizontal support surface are in a right-angle structure, the outer side of the connection between the vertical support surface and the horizontal support surface is chamfered, and the inner side of the connection between the vertical support surface and the horizontal support surface is parallelly arranged with small trapezoidal stiffening plates and large trapezoidal stiffening plates from the inside to the outside, the vertical support surface is tightly attached to the diaphragm and welded, and the horizontal support surface is tightly attached to the horizontal stiffening ribs of the diaphragm and welded.

[0014] In the diaphragm structure with upper vertical double supports, the small trapezoidal stiffening plate and the large trapezoidal stiffening plate form an angle of 45° with the vertical support surface and the horizontal support surface respectively.

[0015] In the diaphragm structure with upper vertical double supports, each double trapezoidal stiffening support member is arranged along the length direction of the diaphragm, and the spacing between adjacent double trapezoidal stiffening support members is consistent with the spacing between adjacent double support plate stiffening ribs.

[0016] The manufacturing method of the diaphragm structure with upper vertical double supports comprises the following steps:

[0017] S1, vertically place the diaphragm at the center of the lower surface of the horizontal stiffening rib and weld it on both sides to form the lower component of the diaphragm structure;

[0018] S2, first align the chamfer with the fillet weld of the lower assembly of the diaphragm structure, then weld the vertical support surface to the diaphragm, and weld the horizontal support surface to the lower surface of the horizontal stiffening rib of the diaphragm to form the lower support assembly of the diaphragm structure;

[0019] S3, vertically place the double-support stiffening rib in the middle of the vertical double-support plate, 100 mm away from the edge of the arc-shaped cutout, and form the upper support assembly of the diaphragm structure by welding;

[0020] S4, welding the upper support assembly of the diaphragm structure and the horizontal stiffening ribs of the diaphragm along the length direction to form a diaphragm structure with upper vertical double supports.

[0021] In the above technical solution, the present invention provides a single-plate double-supported diaphragm structure and a manufacturing method thereof, which have the following advantages and beneficial effects:

[0022] 1. The vertical double support plate and double support stiffening ribs of the present invention are vertically welded to the horizontal stiffening ribs to form a whole, and have good integrity. Compared with the conventional diaphragm, the double support plate increases the contact area, provides effective support, better disperses the stress transmitted by the upper structure, effectively alleviates the stress concentration phenomenon at the diaphragm cutout, and delays the occurrence of fatigue cracks at the diaphragm cutout.

[0023] 2. The double trapezoidal stiffening support of the present invention is fixed at the angle between the horizontal stiffening plate and the diaphragm just below the symmetry center of the two diaphragm cutouts, providing effective support for the horizontal stiffening ribs of the diaphragm, dispersing the stress of the cutout, improving the fatigue resistance of the cutout, increasing the service life of the diaphragm structure, and improving its bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of a diaphragm with upper vertical double supports according to an embodiment of the present invention;

[0025] Figure 2 This is a front view of a diaphragm structure with upper vertical double supports according to an embodiment of the present invention;

[0026] Figure 3 A top view of a diaphragm structure with upper vertical double supports according to an embodiment of the present invention;

[0027] Figure 4This is a schematic diagram of the structure of a diaphragm with upper vertical double supports according to an embodiment of the present invention (excluding double trapezoidal stiffening supports);

[0028] Figure 5 It is a schematic structural diagram of a double trapezoidal stiffening support member according to an embodiment of the present invention.

[0029] In all the drawings, the same figure numbers are used to represent the same elements or structures, among which: 1-vertical double support plate, 2-transverse diaphragm horizontal stiffening ribs, 3-double trapezoidal stiffening support, 4-transverse diaphragm, 5-double support plate stiffening ribs, 6-vertical support surface, 7-small trapezoidal stiffening plate, 8-large trapezoidal stiffening plate, 9-chamfer, 10-horizontal support surface, 11-arc-shaped cutout. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] like Figure 1-Figure 5 As shown, the present invention provides a single-plate double-supported diaphragm structure, which is composed of a vertical double support plate 1, a diaphragm horizontal stiffening rib 2, a double trapezoidal stiffening support member 3, a diaphragm 4, and a double support plate stiffening rib 5. The specific structure is as follows: the vertical double support plate 1 is composed of two relatively parallel vertical support plates connected by double support plate stiffening ribs 5, and there are more than two double support plate stiffening ribs 5 evenly arranged, and arc-shaped cutouts 11 are relatively opened on the vertical support plates between adjacent double support plate stiffening ribs 5; the upper and lower surfaces of the diaphragm horizontal stiffening rib 2 are vertically connected to the vertical double support plate 1 and the diaphragm 4 respectively, and the double trapezoidal stiffening support member 3 is arranged directly below the position of the double support plate stiffening rib 5 of the vertical double support plate 1, and is located at the angle between the lower surface of the diaphragm horizontal stiffening rib 2 and the diaphragm 4.

[0032] Furthermore, the vertical double support plate 1 should be vertically fixed above the horizontal stiffening rib 2 of the diaphragm by welding.

[0033] Furthermore, the double support plate stiffening ribs 5 should be vertically arranged on both sides of the arc-shaped cutout 11, and the distance from the edge of one side of the arc-shaped cutout 11 is 100 mm.

[0034] Furthermore, the arc-shaped cutout 11 is provided with an oval-shaped hole on each vertical support plate, and the top of the oval-shaped hole is inclined upward and opened outward.

[0035] Furthermore, the thickness of each vertical support plate of the vertical double support plate 1 should be equal.

[0036] Furthermore, the transverse diaphragm 4 should be vertically fixed by welding just below the center of the horizontal stiffening rib 2 of the transverse diaphragm, and the transverse diaphragm 4 is located just below the center of the vertical double support plate 1 and is parallel to the vertical double support plate 1.

[0037] Furthermore, the double trapezoidal stiffening support member 3 is composed of a vertical support surface 6, a small trapezoidal stiffening plate 7, a large trapezoidal stiffening plate 8, a chamfer 9 and a horizontal support surface 10, and is made of steel one-piece forming technology. The specific structure is as follows: the vertical support surface 6 and the horizontal support surface 10 are in a right-angle structure, the outer side of the connection between the vertical support surface 6 and the horizontal support surface 10 is a chamfer 9, and the inner side of the connection between the vertical support surface 6 and the horizontal support surface 10 is parallelly arranged with a small trapezoidal stiffening plate 7 and a large trapezoidal stiffening plate 8 from the inside to the outside, the vertical support surface 6 is tightly attached to the transverse partition 4 and welded, and the horizontal support surface 10 is tightly attached to the horizontal stiffening rib 2 of the transverse partition and welded.

[0038] Furthermore, the small trapezoidal stiffening plate 7 and the large trapezoidal stiffening plate 8 form an angle of 45° with the vertical support surface 6 and the horizontal support surface 10 respectively, which not only saves steel but also provides more effective support compared to vertical placement.

[0039] Furthermore, the chamfer 9 prevents the connection weld between the horizontal stiffening rib 2 of the diaphragm and the diaphragm 4 from affecting the installation of the double trapezoidal stiffening support 3 .

[0040] Furthermore, each double trapezoidal stiffening support member 3 should be arranged along the length direction of the transverse partition plate 4 , and the spacing between adjacent double trapezoidal stiffening support members 3 should be consistent with the spacing between adjacent double support plate stiffening ribs 5 .

[0041] like Figure 1-Figure 5 As shown, the manufacturing method of the diaphragm structure with upper vertical double supports of the present invention comprises the following implementation steps:

[0042] S1, vertically place the diaphragm 4 at the center of the lower surface of the horizontal stiffening rib 2 and weld it on both sides to form the lower component of the diaphragm structure;

[0043] S2, first align the chamfer 9 with the fillet weld of the lower assembly of the diaphragm structure, then weld the vertical support surface 6 to the diaphragm 4, and weld the horizontal support surface 10 to the lower surface of the horizontal stiffening rib 2 of the diaphragm to form the lower support assembly of the diaphragm structure;

[0044] S3, vertically place the double-support stiffening rib 5 in the middle of the vertical double-support plate 1, 100 mm away from the edge of the arc-shaped cutout, and form an upper support assembly of the diaphragm structure by welding;

[0045] S4, welding the upper support assembly of the diaphragm structure and the horizontal stiffening ribs 2 of the diaphragm along the length direction to form a diaphragm structure with upper vertical double supports.

[0046] The implementation results show that the present invention can effectively reduce the stress at the incision, alleviate the stress concentration phenomenon, improve the bearing capacity of the structure, enhance the fatigue resistance of the incision of the diaphragm, delay the occurrence of fatigue cracks, improve the stress performance, and extend the service life of the diaphragm structure by changing the structure of the diaphragm while keeping the amount of steel unchanged.

[0047] Finally, it should be noted that the above only describes certain exemplary embodiments of the present invention by way of illustration, and those skilled in the art may modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A diaphragm structure with upper vertical double supports, characterized in that: The diaphragm structure is composed of a vertical double support plate, horizontal stiffening ribs of the diaphragm, double trapezoidal stiffening supports, a diaphragm, and double support plate stiffening ribs. The specific structure is as follows: the vertical double support plate is composed of two relatively parallel vertical support plates connected by double support plate stiffening ribs, there are more than two double support plate stiffening ribs evenly arranged, and arc-shaped cuts are relatively opened on the vertical support plates between adjacent double support plate stiffening ribs; the upper and lower surfaces of the horizontal stiffening ribs of the diaphragm are vertically connected to the vertical double support plate and the diaphragm respectively, and the double trapezoidal stiffening supports are arranged directly below the double support plate stiffening ribs of the vertical double support plate, and are located at the angle between the lower surface of the horizontal stiffening ribs of the diaphragm and the diaphragm.

2. The diaphragm structure with upper vertical double supports according to claim 1, characterized in that: The vertical double support plate is fixed vertically above the horizontal stiffening ribs of the diaphragm by welding.

3. The diaphragm structure with upper vertical double supports according to claim 1, characterized in that: The double support plate stiffening ribs are vertically arranged on both sides of the arc-shaped cutout, and the distance from the edge of one side corresponding to the arc-shaped cutout is 100 mm.

4. The diaphragm structure with upper vertical double supports according to claim 1, characterized in that: The thickness of each vertical support plate of the vertical double support plate is equal.

5. The diaphragm structure with upper vertical double supports according to claim 1, characterized in that: The transverse diaphragm is vertically fixed by welding just below the center of the horizontal stiffening rib of the transverse diaphragm. The transverse diaphragm is located just below the center of the vertical double support plate and is parallel to the vertical double support plate.

6. The diaphragm structure with upper vertical double supports according to claim 1, characterized in that: The double trapezoidal stiffening support member is composed of a vertical supporting surface, a small trapezoidal stiffening plate, a large trapezoidal stiffening plate, a chamfer and a horizontal supporting surface, which are made of steel one-piece forming technology. The specific structure is as follows: the vertical supporting surface and the horizontal supporting surface are in a right-angle structure, the outer side of the connection between the vertical supporting surface and the horizontal supporting surface is chamfered, and the inner side of the connection between the vertical supporting surface and the horizontal supporting surface is parallelly arranged with a small trapezoidal stiffening plate and a large trapezoidal stiffening plate from the inside to the outside, the vertical supporting surface is tightly attached to the transverse diaphragm and welded, and the horizontal supporting surface is tightly attached to the horizontal stiffening rib of the transverse diaphragm and welded.

7. The diaphragm structure with upper vertical double supports according to claim 6, characterized in that: The small trapezoidal stiffening plate and the large trapezoidal stiffening plate form an angle of 45° with the vertical support surface and the horizontal support surface respectively.

8. The diaphragm structure with upper vertical double supports according to claim 6, characterized in that: Each double trapezoidal stiffening support member is arranged along the length direction of the transverse diaphragm, and the spacing between adjacent double trapezoidal stiffening support members is consistent with the spacing between adjacent double support plate stiffening ribs.

9. A method for manufacturing a diaphragm structure with upper vertical double supports according to any one of claims 1 to 8, characterized in that: The steps include: S1, vertically place the diaphragm at the center of the lower surface of the horizontal stiffening rib and weld it on both sides to form the lower component of the diaphragm structure; S2, first align the chamfer with the fillet weld of the lower assembly of the diaphragm structure, then weld the vertical support surface to the diaphragm, and weld the horizontal support surface to the lower surface of the horizontal stiffening rib of the diaphragm to form the lower support assembly of the diaphragm structure; S3, vertically place the double-support stiffening rib in the middle of the vertical double-support plate, 100 mm away from the edge of the arc-shaped cutout, and form the upper support assembly of the diaphragm structure by welding; S4, welding the upper support assembly of the diaphragm structure and the horizontal stiffening ribs of the diaphragm along the length direction to form a diaphragm structure with upper vertical double supports.

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