CN107338720B

CN107338720B - Plate-type suspender wind-resistant flow guiding device

Info

Publication number: CN107338720B
Application number: CN201710540150.5A
Authority: CN
Inventors: 王应良; 周帅; 曾永平; 徐昕宇; 苏延文; 陶奇; 郑晓龙; 杨国静; 董俊; 庞林
Original assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Priority date: 2017-07-05
Filing date: 2017-07-05
Publication date: 2023-05-16
Anticipated expiration: 2037-07-05
Also published as: CN107338720A

Abstract

The wind-resistant guide device of the plate-type suspender is used for effectively improving the pneumatic appearance of the plate-type suspender, improving the wind resistance of the plate-type suspender and fully playing the advantages of the rigid suspender. The plate-type hanger rod comprises a plate-type hanger rod, wherein the plate-type hanger rod is provided with four limbs which are crisscrossed in cross section, guide plates are arranged outside the four limbs, and each guide plate is fixedly arranged on the corresponding limb through connecting members which are arranged at intervals in the length direction of the plate-type hanger rod. The flow guide plate surface is straight and extends along the length direction of the plate-type hanging rod.

Description

Plate-type suspender wind-resistant flow guiding device

Technical Field

The invention relates to a bridge, in particular to a plate-type suspender wind-resistant flow guiding device.

Background

Rigid booms and flexible slings are two common structural forms of mid-under arch bridge booms. The rigid hanger rod is generally made of structural steel and adopts rectangular, H-shaped, round, solid plate-type and other cross-section forms. Flexible slings typically employ high strength parallel steel wires or steel strands as the structural material, typically circular in shape. Because the yield strength of the high-strength steel wire material adopted by the flexible sling is far higher than that of the structural steel adopted by the rigid sling, the sectional area of the rigid sling is obviously higher than that of the flexible sling under the action of the same design axial force, so that the fatigue stress amplitude of the rigid sling is obviously lower than that of the flexible sling. In addition, because the flexible sling rope body is generally arranged in the PE sheath, the PE sheath belongs to a concealed engineering, and daily corrosion prevention and inspection are difficult, the flexible sling rope needs to be replaced periodically in the service process of the arch bridge, on the one hand, higher operation and maintenance cost is generated, and on the other hand, because the transportation needs to be closed in the replacement process of the flexible sling rope, great social influence is generally brought. The service life of the rigid boom is generally consistent with that of the main bearing member of the full bridge, and the rigid boom does not need to be replaced in the use process, so that the rigid boom has great use advantages.

The rigid boom has the advantage of not needing replacement in the use process, but the rigid boom is not commonly applied to the mid-under arch bridge at the present stage due to the poor wind resistance of the rigid boom. For example, in 2006, the Buddha mountain east flat bridge H suspender with the main span of 300m along the sea in southeast of China generates great torsional vibration under the action of strong wind, so that the root parts of a plurality of suspenders are broken, and serious socioeconomic loss is caused; the rectangular section suspender of the Beijing high-speed rail Nanjing great-winning gate length Jiang Daqiao with the main span of 336m still generates great wind-induced vibration after the installation of the real bridge suspending rod despite the adoption of the pneumatic shape optimization measure of the peripheral chamfer, and finally adopts the mechanical damping measure to improve the wind resistance.

Disclosure of Invention

The invention aims to solve the technical problem of providing the wind-resistant guide device of the plate-type suspender, so as to effectively improve the pneumatic appearance of the plate-type suspender, improve the wind resistance of the plate-type suspender and fully exert the advantages of the rigid suspender.

The technical scheme adopted for solving the technical problems is as follows:

the invention relates to a plate-type suspender wind-resistant flow guiding device, which comprises a plate-type suspender, wherein the plate-type suspender is provided with four limbs which are crisscrossed in a cross section, and is characterized in that: the plate-type suspender is characterized in that guide plates are arranged outside four limbs, and each guide plate is fixedly arranged on the corresponding limb through connecting members which are arranged at intervals in the length direction of the plate-type suspender; the flow guide plate surface is straight and extends along the length direction of the plate-type hanging rod.

The invention has the advantages that the pneumatic appearance of the plate-type suspender is improved, the wind resistance is improved, and the advantages of the rigid suspender are fully exerted; the guide device is connected with the plate-type suspender through the pin plate, so that the daily maintenance cost is low, and no obvious cost increase is brought.

Drawings

The specification includes the following two drawings:

FIG. 1 is a front view (partial) of a panel boom anti-wind deflector of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

the components and corresponding indicia are shown: plate boom 10, baffle 11, clamping piece 12.

Detailed Description

The invention will be further described with reference to the drawings and examples.

Referring to fig. 1, the slab boom has four limbs crisscrossed in cross-section, primarily for use in a mid-under arch, disposed primarily in the vertical plane, connecting the arch rib and deck system, and transferring deck system loads to the rib. Referring to fig. 1 and 2, the plate-type boom 10 is provided with guide plates 11 outside four limbs, and each guide plate 11 is fixedly mounted on the corresponding limb through connecting members arranged at intervals in the length direction of the plate-type boom 10. The baffle 11 has a flat surface and extends in the longitudinal direction of the plate hanger bar 10. The arrangement of the guide plate 11 can effectively improve the pneumatic appearance of the plate-type suspender 10, improve the wind resistance of the plate-type suspender and fully exert the advantages of the rigid suspender.

Typically, the baffle 11 is of the same length as the plate hanger bar 10.

Referring to fig. 2, the connecting member is a clip 12 with a C-shaped cross section, the shaft portion of the clip 12 is detachably connected with the baffle 11 through a bolt, and the opening portion of the clip 12 is detachably connected with the limb through a bolt.

The arrangement and installation of the baffle 11 will be further described below with reference to an engineering application example.

Referring to fig. 2, the plate-type hanger bar 10 is in the form of a cross-shaped solid section with an overall dimension of 300×300mm, four elongated guide plates 11 with a cross-sectional dimension of 100×10mm are arranged along the outer sides of four limbs of the section, the longitudinal length of each guide plate 11 is the same as that of the plate-type hanger bar 10, and the vertical clearance between any guide plate 11 and the corresponding limb is 50mm.

The guide plates 11 are connected with the plate-type suspenders 10 through the clamping pieces 12 which are longitudinally arranged at equal intervals, and the longitudinal spacing between the adjacent clamping pieces 12 is 1000mm, so that the guide plates 11 are ensured to be stably connected with the plate-type suspenders 10. The clip 12 is formed by bending a strip-shaped steel sheet with the thickness of 4mm and the width of 40mm, and is of a C-shaped section, and the clearance between the opening parts is the same as the thickness of the corresponding limb plate.

The foregoing is provided by way of illustration of the principles of the present invention, and is not intended to limit the invention to the exact construction and application illustrated and described, but to limit the invention to the full range of equivalents and modifications that may be resorted to, falling within the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a board-like jib wind-proof guiding device, includes board-like jib (10), and board-like jib (10) have and are crisscross four limbs, characterized by in the cross section: the plate-type suspender (10) is characterized in that guide plates (11) are arranged outside four limbs, and each guide plate (11) is fixedly arranged on the corresponding limb through connecting members which are arranged at intervals in the length direction of the plate-type suspender (10); the flow guide plate (11) has a flat plate surface and extends along the length direction of the plate-type suspender (10).

2. The plate boom wind resistant deflector of claim 1, wherein: the length of the guide plate (11) is equal to that of the plate-type suspender (10).

3. The plate boom wind resistant deflector of claim 1, wherein: the connecting component is a clamping piece (12) with a C-shaped cross section, the shaft part of the clamping piece (12) is detachably connected with the guide plate (11) through a bolt, and the opening part of the clamping piece (12) is detachably connected with the limb through the bolt.