A stress regulation structure for resisting shear failure of a steel bridge deck

Abstract

The utility model discloses a kind of stress regulation and control structures of anti steel bridge bridge surface shearing damage, belong to steel bridge technical field, for the uneven shearing stress distribution of steel bridge and pier contact surface caused by steel bridge surface stress concentration, easy to induce microcrack and gradually expand into structural crack, finally cause the problem of local or overall rupture of bridge surface, including pier, the bottom surface of pier inner side wall is fixed with horizontal plate, the top surface middle part of horizontal plate is fixed with double-shaft motor, two output ends of double-shaft motor are fixed with threaded rod respectively, the both sides of the top surface of horizontal plate are fixed with side block;The utility model cooperates with control box, adjusts the position of dispersion type support frame, so that the position of stress concentration of steel bridge can be supported, effectively disperses stress, avoids uneven shearing stress distribution of steel bridge and pier contact surface caused by concentrated stress, easy to induce microcrack and gradually expand into structural crack, finally cause the local or overall rupture of bridge surface.

Description

Technical Field

[0001] This utility model belongs to the field of steel bridge technology, specifically relating to a stress regulation structure for resisting shear failure of steel bridge deck. Background Technology

[0002] Steel bridges, as an important component of modern transportation infrastructure, are widely used in the construction of long-span bridges and in complex terrain areas due to their advantages such as high strength, lightweight, and ease of construction. However, during long-term service, the surface of steel bridges is prone to localized stress concentration due to factors such as vehicle loads, changes in ambient temperature, and material fatigue.

[0003] In existing technologies, the design of the connection between steel bridges and piers often adopts traditional rigid welding or bolt fixing methods. Although such structures can provide initial stability, under dynamic loads, the stress concentration area will significantly increase the shear force between the steel bridge and the pier. The concentrated stress leads to uneven shear stress distribution on the contact surface between the steel bridge and the pier, which can easily induce microcracks and gradually expand into structural cracks, eventually causing local or overall rupture of the bridge deck.

[0004] Therefore, a stress regulation structure is needed to resist shear failure of steel bridge decks, in order to solve the problem in the existing technology that stress concentration on the surface of steel bridges leads to uneven shear stress distribution at the contact surface between the steel bridge and the pier, which easily induces microcracks and gradually expands into structural cracks, eventually causing local or overall failure of the bridge deck. Utility Model Content

[0005] The purpose of this invention is to provide a stress regulation structure that resists shear failure of steel bridge decks, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stress-regulating structure for resisting shear failure of steel bridge decks, comprising a pier, a horizontal plate fixed to the bottom surface of the inner sidewall of the pier, a dual-axis motor fixed to the center of the top surface of the horizontal plate, threaded rods fixed to the two output ends of the dual-axis motor, side blocks fixed to both sides of the top surface of the horizontal plate, a non-threaded end of the threaded rod being movably connected to the corresponding side block, a distributed support frame provided on both sides of the top surface of the horizontal plate, a T-shaped slider fixed to both sides of the bottom surface of the distributed support frame, two guide rails fixed to the top surface of the horizontal plate, the T-shaped sliders being movably connected to the guide rails, and a threaded strip fixed to the center of the bottom surface of the distributed support frame, the threaded strip being movably connected to the corresponding threaded rod.

[0007] It should be noted in the scheme that a steel bridge is set above the bridge pier, a bottom plate is fixed to the bottom surface of the steel bridge, a number of evenly distributed web plates are fixed to the top surface of the bottom plate, a number of evenly distributed transverse diaphragms are fixed between two adjacent web plates, the transverse diaphragms and the web plates are arranged in a cross shape, and fiber optic grating sensors are fixed to one side of a number of transverse diaphragms in the middle.

[0008] It is worth noting that a control box is fixed on one side of the outer wall of the bridge pier, and several of the fiber optic grating sensors are electrically connected to the control box.

[0009] Furthermore, it should be noted that several connecting plates of different lengths are fixed on both sides of the bottom surface of the horizontal plate, and one end of each of the connecting plates is fixed to the outer wall of the bridge pier.

[0010] In a preferred embodiment, the bottom surface of the distributed support frame is fixed with two support bars, and the bottom surface of the support bars contacts the top surface of the horizontal plate.

[0011] In a preferred embodiment, a bottom pier is fixed to the middle of the bottom surface of the base plate, and the bottom surface of the bottom pier is fixed to the top surface of the bridge pier.

[0012] Compared with the prior art, the stress regulation structure for resisting shear failure of steel bridge decks provided by this utility model has at least the following beneficial effects:

[0013] (1) By setting up a dual-axis motor, threaded rod and threaded strip, the distributed support frame can adjust its position in real time according to the stress of the steel bridge surface to support the bottom plate. By setting up fiber optic grating sensors and control boxes, the stress generated on the steel bridge surface can be monitored in real time. Then, in conjunction with the control box, the position of the distributed support frame can be adjusted so that the stress concentration points of the steel bridge can be supported, effectively dispersing the stress and avoiding uneven shear stress distribution on the contact surface between the steel bridge and the pier caused by concentrated stress. This can easily induce microcracks and gradually expand into structural cracks, eventually causing local or overall cracking of the bridge deck.

[0014] (2) By setting up connecting plates, the connecting plates of different lengths form multiple triangular supports with the piers and cross plates. The connecting plates transfer the force on the cross plates to the piers. This setting avoids stress concentration on the cross plates, which causes deformation of the cross plates and deformation of the threaded rods, affecting the movement of the distributed support frame. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the distributed support frame structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the overall side view structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the transverse partition structure of this utility model.

[0019] In the picture:

[0020] 100. Bridge pier; 101. Horizontal plate; 102. Guide rail; 103. Distributed support frame; 104. T-shaped slider;

[0021] 200. Dual-shaft motor; 201. Side block; 202. Threaded rod; 203. Threaded strip; 204. Support strip;

[0022] 300. Connecting plate;

[0023] 400. Base plate; 401. Diaphragm; 402. Web plate; 403. Fiber Bragg grating sensor; 404. Pier; 405. Steel bridge;

[0024] 500. Control box. Detailed Implementation

[0025] Please see Figures 1-4 This utility model provides a stress-regulating structure for resisting shear failure of steel bridge decks, including a pier 100. A horizontal plate 101 is fixed to the bottom surface of the inner side wall of the pier 100. A dual-axis motor 200 is fixed to the middle of the top surface of the horizontal plate 101. Threaded rods 202 are fixed to the two output ends of the dual-axis motor 200. Side blocks 201 are fixed to both sides of the top surface of the horizontal plate 101. One end of the threaded rod 202 is movably connected to the corresponding side block 201 at a non-threaded position. Dispersed support frames 103 are respectively provided on both sides of the top surface of the horizontal plate 101. T-shaped sliders 104 are fixed to both sides of the bottom surface of the dispersed support frames 103. Two guide rails 102 are fixed to the top surface of the horizontal plate 101. The T-shaped sliders 104 are movably connected to the guide rails 102. A threaded strip 203 is fixed to the middle of the bottom surface of the dispersed support frame 103. The threaded strip 203 is movably connected to the corresponding threaded rod 202.

[0026] Further as Figure 1 and Figure 4 As shown, a steel bridge 405 is provided above the pier 100. A base plate 400 is fixed to the bottom surface of the steel bridge 405. Several evenly distributed web plates 402 are fixed to the top surface of the base plate 400. The top surface of the web plates 402 is connected to the bottom surface of the steel bridge 405. Several evenly distributed transverse diaphragms 401 are fixed between two adjacent web plates 402. The transverse diaphragms 401 and the web plates 402 are arranged in a cross shape. Fiber optic grating sensors 403 are fixed to one side of several transverse diaphragms 401 in the middle.

[0027] By using the fiber optic grating sensor 403, the stress on the surface of the steel bridge 405 can be monitored in real time. The stress generated on the surface of the steel bridge 405 can be transmitted to the transverse diaphragm 401 through the web 402, and then to the fiber optic grating sensor 403. The fiber optic grating sensor 403 transmits the stress generated on the surface of the steel bridge 405 to the control box 500. The control box 500 analyzes and compares the stress at different locations on the surface of the steel bridge 405 to detect whether there is excessive stress concentration on the surface of the steel bridge 405. This setting facilitates real-time monitoring of the stress on the surface of the steel bridge 405, and allows for timely adjustment of the position of the distributed support frame 103 according to the stress generated on the surface of the steel bridge 405, thereby dispersing the stress on the surface of the steel bridge 405 and effectively preventing the stress concentration on the surface of the steel bridge 405 from generating shear force and causing the steel bridge 405 to break.

[0028] Further as Figure 1 As shown, a control box 500 is fixed on one side of the outer wall of the pier 100, and several fiber optic grating sensors 403 are electrically connected to the control box 500 respectively.

[0029] The control box 500 enables the stress monitored by the fiber optic grating sensor 403 to be transmitted to the control box 500. The control box 500 stores stress values ​​at different locations on the steel bridge 405 during normal use. When the control box 500 receives stress values ​​at different locations on the steel bridge 405, it compares these values ​​with the stress values ​​stored inside the control box 500. When a stress concentration is detected at a location on the surface of the steel bridge 405, the control box 500 controls the dual-axis motor 200 to rotate a certain number of revolutions, causing the distributed support frame 103 to move to the stress concentration location. The distributed support frame 103 supports the corresponding location on the bottom of the base plate 400, thus dispersing the stress.

[0030] Further as Figure 1 As shown, several connecting plates 300 of different lengths are fixed on both sides of the bottom surface of the horizontal plate 101, and one end of each of the connecting plates 300 is fixed to the outer wall of the pier 100.

[0031] The connecting plates 300 of varying lengths form multiple triangular supports with the pier 100 and the horizontal plate 101. The connecting plates 300 transfer the force on the horizontal plate 101 to the pier 100. This arrangement avoids stress concentration on the horizontal plate 101.

[0032] Further as Figure 2 As shown, the bottom surface of the distributed support frame 103 is fixed with two support bars 204, and the bottom surface of the support bars 204 is in contact with the top surface of the horizontal plate 101.

[0033] The support bars 204 allow the force of the distributed support frame 103 to be transmitted to the horizontal plate 101.

[0034] Further as Figure 2 As shown, a base pier 404 is fixed in the middle of the bottom surface of the base plate 400, and the bottom surface of the base pier 404 is fixed to the top surface of the bridge pier 100.

[0035] The base pier 404 enables the base plate 400 to connect with the pier 100, thereby supporting the steel bridge 405.

[0036] In summary: During normal use, stress will be generated at different locations on the surface of the steel bridge 405. The fiber optic grating sensor 403 monitors the surface stress of the steel bridge 405 in real time and transmits the monitored stress value to the control box 500. The control box 500 compares this value with the stress values ​​stored inside the control box 500. When a stress concentration is detected at a location on the surface of the steel bridge 405, the control box 500 controls the dual-axis motor 200 to rotate a certain number of revolutions. The rotation of the dual-axis motor 200 drives the threaded rod 202 to rotate, which in turn drives the threaded strip 203 to move. The movement of bar 203 causes the distributed support frame 103 to move. The distributed support frame 103 moves to the stress concentration point and provides support at that point, so that the stress at that point can be distributed to the distributed support frame 103, and then transmitted to the cross plate 101 through the support bar 204, and then to the bridge pier 100 through the connecting plate 300, and then to the ground through the bridge pier 100. This arrangement can effectively eliminate the concentrated stress generated on the surface of the steel bridge 405, and avoid stress concentration, which could cause shear force between the steel bridge 405 and the bridge pier 100, resulting in the cracking of the steel bridge 405.

[0037] The threads of the two threaded rods 202 are arranged in opposite directions, so that when the dual-axis motor 200 rotates and drives the two threaded rods 202 to rotate, the distributed support frames 103 on both sides can move away from each other.

[0038] The dual-axis motor 200, fiber optic grating sensor 403, and control box 500 can all be purchased from the market. They are mature technologies in this field and have been fully disclosed, so they will not be described again in the manual.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stress regulating structure against shear failure of a steel bridge deck of a bridge, comprising a pier (100), characterized in that, A horizontal plate (101) is fixed to the bottom surface of the inner wall of the pier (100). A dual-axis motor (200) is fixed to the middle of the top surface of the horizontal plate (101). Threaded rods (202) are fixed to the two output ends of the dual-axis motor (200). Side blocks (201) are fixed to both sides of the top surface of the horizontal plate (101). One end of the threaded rod (202) is movably connected to the corresponding side block (201) at a non-threaded position. Dispersed support frames (103) are respectively provided on both sides of the top surface of the horizontal plate (101). T-shaped sliders (104) are fixed to both sides of the bottom surface of the dispersed support frames (103). Two guide rails (102) are fixed to the top surface of the horizontal plate (101). The T-shaped sliders (104) are movably connected to the guide rails (102). The bottom of the dispersed support frames (103) is... A threaded bar (203) is fixed in the middle of the bridge pier (100). The threaded bar (203) is movably connected to the corresponding threaded rod (202). A steel bridge (405) is set above the pier (100). A base plate (400) is fixed on the bottom surface of the steel bridge (405). Several evenly distributed web plates (402) are fixed on the top surface of the base plate (400). Several evenly distributed transverse diaphragms (401) are fixed between two adjacent web plates (402). The transverse diaphragms (401) and the web plates (402) are arranged in a cross shape. Fiber grating sensors (403) are fixed on one side of several transverse diaphragms (401) in the middle. A control box (500) is fixed on one side of the outer wall of the pier (100). Several fiber grating sensors (403) are electrically connected to the control box (500).

2. The stress regulating structure against shear failure of steel bridge deck according to claim 1, characterized in that: Several connecting plates (300) of different lengths are fixed on both sides of the bottom surface of the horizontal plate (101), and one end of each of the connecting plates (300) is fixed to the outer wall of the pier (100).

3. The stress regulating structure against shear failure of steel bridge deck according to claim 1, characterized in that: The bottom surface of the distributed support frame (103) is fixed with two support bars (204), and the bottom surface of the support bars (204) is in contact with the top surface of the horizontal plate (101).

4. The stress regulating structure against shear failure of steel bridge deck according to claim 1, characterized in that: A base pier (404) is fixed in the middle of the bottom surface of the base plate (400), and the bottom surface of the base pier (404) is fixed to the top surface of the bridge pier (100).

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