A wind resistant device for a double-layer truss

Abstract

The application discloses a kind of wind resistance device suitable for double-layer truss, belong to truss girder bridge technical field, including upper bridge deck and lower bridge deck, the bottom of upper bridge deck and lower bridge deck is provided with crossbeam, the both sides of crossbeam are provided with longitudinal beam fixed with upper bridge deck, lower bridge deck, the vertical adjacent longitudinal beam is provided with several vertical setting web member, adjacent web member is provided with inclined strut, the both ends of inclined strut, web member are connected and fixed with adjacent longitudinal beam;Inclined strut is provided with parallel connecting cylinder, the both ends in connecting cylinder are slidably connected with transmission rod, the circumferential side of transmission rod is provided with wavy annular groove, the both ends of connecting cylinder are rotatably connected with coaxial support sleeve, the outer side of support sleeve is provided with blade, the inside of support sleeve is provided with several protrusions that extend into annular groove;Longitudinal beam side wall is provided with several hydraulic energy dissipation devices connected with transmission rod;The purpose of the application is to solve the problem that the safety performance of existing double-layer truss bridge is reduced due to wind-induced effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of truss girder bridges, and particularly relates to a wind-resistant device suitable for double-layer trusses. BACKGROUND

[0002] With the rapid development of the transportation industry, bridge engineering has also undergone many changes. Double-layer truss girder bridges not only have the advantage of fully and reasonably utilizing natural space, but also are more economical in terms of construction materials and construction costs, and have good environmental protection, economy and sustainability, and therefore are widely used.

[0003] However, due to the higher height and more complex structure of double-layer truss girder bridges, the vibration caused by wind-induced effects poses a greater threat to double-layer trusses. SUMMARY

[0004] Therefore, the present application discloses a wind-resistant device suitable for double-layer trusses, which aims to solve the problem of reduced safety performance of existing double-layer truss bridges caused by wind-induced effects.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A wind-resistant device suitable for double-layer trusses, comprising an upper bridge deck and a lower bridge deck, wherein the upper bridge deck and the lower bridge deck are provided with cross beams at the bottom, the cross beams are provided with longitudinal beams fixed to the upper bridge deck and the lower bridge deck on both sides, a plurality of vertically arranged web members are arranged between vertically adjacent longitudinal beams, and diagonal bracing members are arranged between adjacent web members, both ends of the diagonal bracing members and the web members are connected and fixed to adjacent longitudinal beams; a connecting cylinder parallel to the diagonal bracing members is arranged on the diagonal bracing members, both ends of the connecting cylinder are slidably connected with transmission rods, the transmission rods are provided with wave-shaped annular grooves on the circumferential side, both ends of the connecting cylinder are rotatably connected with coaxial support sleeves, the support sleeves are provided with blades on the outer side, and a plurality of protrusions extending into the annular grooves are arranged on the inner side of the support sleeves; a plurality of hydraulic energy dissipation devices connected with the transmission rods are arranged on the side walls of the longitudinal beams.

[0007] In this scheme, when the wind blows towards the double-layer truss, the wind drives the support sleeves to rotate relative to the connecting cylinder through the blades, and when the support sleeves rotate, the transmission rods are reversely reciprocated along the axis of the connecting cylinder through the cooperation of the annular grooves and the protrusions, so that the radial wind force acting on the diagonal bracing members is basically converted into axial force, reducing the influence of the wind on the diagonal bracing members and preventing the diagonal bracing members from being damaged; at the same time, the hydraulic energy dissipation devices are used to dissipate energy while the transmission rods reciprocate, which not only reduces the kinetic energy of the double-layer truss, but also effectively changes the flow pattern around the double-layer truss, thereby suppressing the vibration of the double-layer truss girder bridge caused by wind-induced effects.

[0008] Further, the blades are arc-shaped, the bending directions of the blades at the two ends of the same connecting cylinder are opposite, and the bending directions of the blades at the ends of adjacent connecting cylinders are also opposite; a plurality of transmission gears are rotationally connected to the outer wall of the connecting cylinder, the transmission gears are located between adjacent support sleeves, and the opposite ends of the support sleeves are provided with teeth that mesh with the transmission gears.

[0009] In the scheme, since the bending directions of the blades at the two ends of the same connecting cylinder are opposite, the blades with the inner arc surface facing the wind direction drive the support sleeve at one end of the connecting cylinder to rotate forward and drive the transmission rod to move to trigger the hydraulic energy consumption device to work, and the support sleeve drives the support sleeve at the other end of the connecting cylinder to rotate reversely through the meshing of the transmission gears, and the reverse rotation of the support sleeve also triggers the corresponding hydraulic energy consumption device to work, thereby improving the energy consumption efficiency, and at the same time, the support sleeve drives the corresponding blade to rotate to generate airflow opposite to the wind direction, so as to form turbulence and more effectively change the flow pattern around the double-layer truss, thereby improving the vibration suppression effect of the double-layer truss girder. At the same time, since the bending directions of the blades at the ends of adjacent connecting cylinders are also opposite, the turbulence directions generated at the ends of adjacent connecting cylinders are also different, thereby significantly improving the ability to change the flow pattern around the double-layer truss.

[0010] Further, the hydraulic energy consumption device comprises two hydraulic cylinder bodies fixedly connected to and parallel to the longitudinal beams, a hydraulic rod is arranged between adjacent hydraulic cylinder bodies, both ends of the hydraulic rod extend into and are slidably connected to the corresponding hydraulic cylinder bodies, and a first hydraulic plate is arranged at the end of the hydraulic rod; a through slot is arranged in the middle of the hydraulic rod, the end of the transmission rod penetrates through the through slot, an inclined guide rod is hinged to the transmission rod, and one end of the guide rod is hinged to the end of the through slot. The movement directions of the horizontally adjacent hydraulic rods are opposite.

[0011] In the scheme, when the transmission rod reciprocates, the hydraulic rod reciprocates horizontally through the guide rod, and the first hydraulic plates at both ends of the hydraulic rod also synchronously move to consume hydraulic energy. In addition, since the bending directions of the blades at the ends of adjacent connecting cylinders are opposite, the movement directions of the transmission rods at the same end of adjacent connecting cylinders are opposite, and thus the movement directions of the horizontally adjacent hydraulic rods are opposite, that is, the first hydraulic plate on one of the hydraulic rods exerts a positive force on the liquid in the hydraulic cylinder body, and the first hydraulic plate on the adjacent hydraulic rod exerts a reverse force on the liquid in the hydraulic cylinder body. When the vibration generated between the two is transmitted to the longitudinal beam, it is offset, thereby reducing the vibration influence on the double-layer truss.

[0012] Further, a plurality of connecting shafts opposite to the hydraulic rods are arranged between the longitudinal beams, the ends of the connecting shafts penetrate through and are rotationally connected to the corresponding longitudinal beams, coaxial drive gears are fixed to the two ends of the connecting shafts, and teeth are arranged on the hydraulic rods and mesh with the drive gears.

[0013] When the wind blows horizontally and vertically to one side of the double-layer truss girder bridge, the adjacent blades are blown to rotate, triggering the subsequent work of the wind-resistant device, and the wind-resistant device on the other side is not affected by the wind force at this time, at this time, the horizontal reciprocation of the hydraulic rod on one side of the double-layer truss is used to drive the synchronous reciprocation of the hydraulic rod on the other side through the cooperation of the hydraulic rod and the driving gear and the connecting shaft, triggering the subsequent energy consumption, improving the energy consumption efficiency, and enhancing the vibration suppression effect on the double-layer truss.

[0014] Further, the blades are hinged to the outer wall of the support sleeve, and a torsional spring is arranged at the hinge; a plurality of limiting plates are arranged on the support sleeve, and the limiting plates abut against the outer cam surface of the adjacent blades.

[0015] Further, the connecting barrel is internally provided with a hydraulic chamber, and the opposite ends of the transmission rods are fixedly provided with second hydraulic plates extending into the hydraulic chamber.

[0016] Other advantages, objects, and features of the present application will be apparent from the following specification and will be learned from practice of the present application. The objects and other advantages of the present application can be realized and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the objects, technical solutions and beneficial effects of the present application clearer, the present application provides the following drawings for description:

[0018] Figure 1 The figure is a structural schematic diagram of an embodiment of the present application;

[0019] Figure 2 The figure is a structural schematic diagram of an embodiment of the present application; Figure 1 The figure is an enlarged schematic diagram of position A in the figure;

[0020] Figure 3 The figure is a sectional view of the support sleeve in an embodiment of the present application;

[0021] Figure 4 The figure is a structural schematic diagram of the hydraulic cylinder in an embodiment of the present application.

[0022] In the drawings, the following marks are used: upper bridge deck 1, lower bridge deck 2, longitudinal beam 3, web 4, diagonal bracing 5, connecting barrel 6, transmission rod 7, support sleeve 8, protrusion 9, annular groove 10, blade 11, transmission gear 12, hydraulic cylinder 13, first hydraulic plate 14, guide rod 16, connecting shaft 17, driving gear 18, second hydraulic plate 19. DETAILED DESCRIPTION

[0023] As shown in the figure: Figures 1-4

[0024] ​The application discloses a wind-resistant device suitable for a double-layer truss, which comprises an upper bridge deck 1 and a lower bridge deck 2, the bottom of the upper bridge deck 1 and the bottom of the lower bridge deck 2 are fixed with a cross beam, the cross beam is fixed with longitudinal beams 3 on both sides and connected with the upper bridge deck 1 and the lower bridge deck 2, a plurality of vertical web members 4 are arranged between vertically adjacent longitudinal beams 3, diagonal bracing rods 5 are arranged between adjacent web members 4, and both ends of the diagonal bracing rods 5 and the web members 4 are welded with adjacent longitudinal beams 3; a connecting cylinder 6 parallel to the diagonal bracing rods 5 is arranged on the diagonal bracing rods 5, a support (not shown in the figure) for supporting the connecting cylinder 6 is arranged between the diagonal bracing rods 5 and the connecting cylinder 6, a transmission rod 7 is slidably connected to both ends in the connecting cylinder 6, a wavy annular groove 10 is formed in the side of the transmission rod 7, a support sleeve 8 coaxial with the transmission rod 7 is rotatably connected to both ends of the connecting cylinder 6, a blade 11 is arranged on the outer side of the support sleeve 8, and a plurality of protrusions 9 extending into the annular groove 10 are integrally formed in the inner side of the support sleeve 8; a plurality of hydraulic energy dissipation devices connected with the transmission rod 7 are arranged on the side wall of the longitudinal beam 3.

[0025] In the application, when the wind blows to the double-layer truss, the wind drives the support sleeve 8 to rotate relative to the connecting cylinder 6 through the blade 11, and when the support sleeve 8 rotates, the transmission rod 7 is reversely reciprocated along the connecting cylinder 6 through the cooperation of the annular groove 10 and the protrusion 9, so that the radial wind force borne by the diagonal bracing rod 5 is basically converted into an axial force, the influence of the wind on the diagonal bracing rod 5 is reduced, and the diagonal bracing rod 5 is prevented from being damaged; meanwhile, the hydraulic energy dissipation device is used to dissipate energy while the transmission rod 7 reciprocates, so that the kinetic energy borne by the double-layer truss is reduced, the flow pattern around the double-layer truss is effectively changed, and the vibration of the double-layer truss girder bridge caused by the wind-induced effect is inhibited.

[0026] In the embodiment, the blade 11 is arc-shaped, the bending directions of the blades 11 at both ends of the same connecting cylinder 6 are opposite, and the bending directions of the blades 11 at the ends of adjacent connecting cylinders 6 are also opposite; a plurality of transmission gears 12 are rotatably connected to the outer wall of the connecting cylinder 6, a through groove for connecting the transmission gears 12 with the connecting cylinder 6 is arranged on the support, the transmission gears 12 are located between adjacent support sleeves 8, and the support sleeves 8 are provided with teeth meshing with the transmission gears 12 on the opposite ends.

[0027] In the scheme, since the bending directions of the blades 11 at both ends of the same connecting cylinder 6 are opposite, the blade 11 with the inner arc surface facing the wind direction drives the support sleeve 8 at one end of the connecting cylinder 6 to rotate forward and drives the transmission rod 7 to move to trigger the hydraulic energy consumption device to work, and the support sleeve 8 drives the support sleeve 8 at the other end of the connecting cylinder 6 to rotate reversely through the meshing of the transmission gear 12, and the reverse rotation of the support sleeve 8 also triggers the corresponding hydraulic energy consumption device to work, thereby improving the energy consumption efficiency, and the support sleeve 8 drives the corresponding blade 11 to rotate to generate airflow opposite to the wind direction, so as to form turbulence and more effectively change the flow pattern around the double-layer truss, thereby improving the vibration suppression effect of the double-layer truss girder. At the same time, since the bending directions of the blades 11 at the ends of the adjacent connecting cylinders 6 are also opposite, the turbulence directions generated by the ends of the adjacent connecting cylinders 6 are also different, thereby significantly improving the ability to change the flow pattern around the double-layer truss.

[0028] In the embodiment, the hydraulic energy consumption device includes two hydraulic cylinder bodies 13 fixedly connected with and parallel to the longitudinal beams 3, a hydraulic rod is arranged between adjacent hydraulic cylinder bodies 13, both ends of the hydraulic rod are arranged to extend into the corresponding hydraulic cylinder body 13 and are slidably connected with the hydraulic cylinder body 13, and a first hydraulic plate 14 is arranged at the end of the hydraulic rod. A through slot is arranged in the middle of the hydraulic rod, the end of the transmission rod 7 penetrates through the through slot, an inclined guide rod 16 is hinged to the transmission rod 7, and one end of the guide rod 16 is hinged to the end of the through slot. The movement directions of the horizontally adjacent hydraulic rods are opposite.

[0029] In the scheme, when the transmission rod 7 reciprocates, the hydraulic rod reciprocates horizontally through the guide rod 16, and the first hydraulic plates 14 at both ends of the hydraulic rod also reciprocate synchronously to consume hydraulic energy. In addition, since the bending directions of the blades 11 at the ends of the adjacent connecting cylinders 6 are opposite, the movement directions of the transmission rods 7 at the same end of the adjacent connecting cylinders 6 are opposite, and the movement directions of the horizontally adjacent hydraulic rods are opposite, that is, the first hydraulic plate 14 on one of the hydraulic rods exerts a positive force on the liquid in the hydraulic cylinder body 13, and the first hydraulic plate 14 on the adjacent hydraulic rod exerts a reverse force on the liquid in the hydraulic cylinder body 13. When the vibration generated between the two is transmitted to the longitudinal beam 3, it is offset, thereby reducing the vibration influence on the double-layer truss.

[0030] In the embodiment, a plurality of connecting shafts 17 opposite to the hydraulic rods are arranged between the longitudinal beams 3, the ends of the connecting shafts 17 penetrate through the corresponding longitudinal beams 3 and are rotatably connected with the longitudinal beams 3, coaxial drive gears 18 are fixedly arranged at both ends of the connecting shaft 17, and a tooth shape is arranged on the hydraulic rod and meshes with the drive gear 18.

[0031] When the wind blows horizontally and vertically to one side of the double truss girder bridge, the adjacent blades 11 are blown to rotate, triggering the subsequent work of the wind resistance device, and the wind resistance device on the other side is not affected by the wind force at this time. The horizontal reciprocating of the hydraulic rod on one side of the double truss is used to drive the synchronous reciprocating movement of the hydraulic rod on the other side through the cooperation of the hydraulic rod, the driving gear 18 and the connecting shaft 17, triggering the subsequent energy dissipation, improving the energy dissipation efficiency, and enhancing the vibration suppression effect on the double truss.

[0032] In the embodiment, the blades 11 are hinged to the outer wall of the support sleeve 8, and torsional springs are arranged at the hinge positions. A plurality of limiting plates are arranged on the support sleeve 8, and the limiting plates abut against the outer arc surfaces of the adjacent blades 11. The limiting plates are used to support the blades 11, so that the blades 11 can only be deflected towards the inner arc surfaces of the blades 11, so as to facilitate the deflection of the blades 11 when the blades 11 contact the diagonal bracing rods 5, reduce the gap between the wind resistance device and the diagonal bracing rods 5, and also reduce the airflow generated when the blades 11 rotate, avoiding excessive airflow to cause radial force on the diagonal bracing rods 5.

[0033] In the embodiment, the connecting barrel 6 is internally provided with a hydraulic chamber, and the opposite ends of the transmission rods 7 are fixed with second hydraulic plates 19 extending into the hydraulic chamber. The transmission rods 7 in the same connecting barrel 6 move in opposite directions.

[0034] Through the above structure, multi-stage energy dissipation is formed. Since the transmission rods 7 in the same connecting barrel 6 move in opposite directions, the distance change efficiency between the second hydraulic rods is effectively increased. In the case of the same cross-sectional area of the hydraulic chamber, the hydraulic change efficiency is faster, that is, the energy dissipation efficiency is higher.

[0035] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A wind resistant device suitable for use with a double trussed roof characterized in that: The utility model provides a kind of bridge structure, including upper bridge surface and lower bridge surface, the bottom of upper bridge surface and lower bridge surface is provided with crossbeam, the both sides of crossbeam are provided with longitudinal beam fixed with upper bridge surface, lower bridge surface, vertical adjacent longitudinal beam is provided with several vertical setting web member, diagonal bracing between adjacent web member is provided with diagonal bracing, the both ends of diagonal bracing, web member are connected and fixed with adjacent longitudinal beam;Diagonal bracing is provided with connecting cylinder parallel with it on the diagonal bracing, the both ends in connecting cylinder are slidably connected with transmission rod, the circumferential side of transmission rod is provided with wavy annular groove, the both ends of connecting cylinder are rotatably connected with coaxial support sleeve, the outside of support sleeve is provided with blade, the inside of support sleeve is provided with several protrusions that protrude into annular groove;The side wall of longitudinal beam is provided with several hydraulic energy consumption devices connected with transmission rod;The blade is arc, the bending direction of blade at the both ends of same connecting cylinder is opposite, the bending direction of blade at the end of adjacent connecting cylinder is also opposite;Connecting cylinder is provided with several transmission gears rotatably connected on the outer wall of connecting cylinder, the transmission gears are located between adjacent support sleeves, the teeth that mesh with transmission gear are provided on the opposite ends of support sleeve;The hydraulic energy consumption device includes two hydraulic cylinder bodies fixedly connected with longitudinal beam and parallel with it, hydraulic rod is provided between adjacent hydraulic cylinder bodies, the both ends of hydraulic rod are distributed into corresponding hydraulic cylinder body and slidably connected with it, and first hydraulic plate is provided at the end of hydraulic rod;The middle of hydraulic rod is provided with through slot, the end of transmission rod passes through through slot, the guide rod that is obliquely arranged is hinged on the transmission rod, and one end of guide rod is hinged with the end of through slot;The movement direction of horizontally adjacent hydraulic rod is opposite.

2. A wind resistant device for a double-layer truss according to claim 1, characterized in that: Connecting shaft is provided between the longitudinal beam, the end of connecting shaft passes through corresponding longitudinal beam and is rotatably connected with it, driving gear of coaxial line is fixed at the both ends of connecting shaft, and the teeth shape that meshes with driving gear is provided on the hydraulic rod.

3. A wind resistant device for a double-layer truss according to claim 2, wherein: The blade is hinged with the outer wall of support sleeve, and torsional spring is arranged at the hinge, the support sleeve is provided with several limit plates, and the outer cam surface of adjacent blade is abutted.

4. A wind resistant device for a double-layer truss according to claim 3, wherein: Connecting cylinder is provided with hydraulic cavity in the inside, the opposite ends of transmission rod are fixed with second hydraulic plate that protrudes into hydraulic cavity, and the movement direction of transmission rod in same connecting cylinder is opposite.

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