Test model of cable-stayed bridge with deck alignment adjustment function

Abstract

The utility model discloses a cable-stayed bridge test model with bridge deck linear adjustment function in the field of bridge test model, include: bridge deck, bridge pier, vertical be located in the both ends of bridge deck, realize the support to bridge deck, and place the connection between bridge pier and bridge deck, bridge tower, vertical be located in the middle of bridge deck, tension assembly, two ends are connected on bridge tower and bridge deck respectively, monitoring system, locate on bridge deck, tension assembly, control system, with monitoring system and tension assembly electric connection, the utility model has the advantages of: through setting up tension assembly and connecting bridge deck and bridge tower, can control tension assembly and realize bridge deck active deformation test, and set up monitoring system and control system, make the automation degree of whole model higher, and will bridge deck and bridge pier between the movable connection, make bridge deck can make the vertical relative displacement relative to bridge pier, make bridge deck relative bridge pier's moving range increase, more favorable to widen the linear variation range of bridge deck.

Description

Technical Field

[0001] This utility model relates to the field of bridge test models, specifically to a cable-stayed bridge test model with bridge deck alignment adjustment function. Background Technology

[0002] Due to the geometric instability of traditional cable-stayed bridge structures under complex service environments, it is difficult to guarantee high smoothness of the bridge deck alignment. With the development of structural control engineering, information technology, and materials science, and by leveraging the concept of active control, sensors, brakes, and other components are highly integrated into long-span cable-stayed bridge structures. This introduces active deformation control technology into long-span cable-stayed bridge structures, enabling them to dynamically adjust cable forces to control the deformation of the main girder based on environmental information or structural response.

[0003] Control system integration and model testing are common methods for verifying the feasibility and effectiveness of deformation-active control structural design schemes. Most current cable-stayed bridge test models adopt traditional tensioning methods. After the model is tensioned, its structural shape tends to be fixed, and its geometric shape and cable force distribution cannot be flexibly adjusted, making it difficult to meet the deformation and real-time control requirements of deformation-active control cable-stayed bridges during the control process.

[0004] Therefore, we propose a cable-stayed bridge test model with bridge deck alignment adjustment function. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a cable-stayed bridge test model with bridge deck alignment adjustment function.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows: A test model of a cable-stayed bridge with adjustable bridge deck alignment includes: a bridge deck; piers, vertically located at both ends of the bridge deck to support it, with connections between the piers and the bridge deck to allow relative vertical movement between the bridge deck and the piers; a bridge tower, vertically located in the middle of the bridge deck; a tensioning assembly, connected at both ends to the bridge tower and the bridge deck respectively, to tension the bridge deck; a monitoring system, located on the bridge deck and the tensioning assembly, used to monitor the displacement of the bridge deck, the applied force of the tensioning assembly, and to collect strain data of the bridge deck; and a control system electrically connected to the monitoring system and the tensioning assembly.

[0007] By setting up tensioning components, a monitoring system, and a control system, and connecting the bridge towers and the bridge deck through the tensioning components, the tension of the cables can be flexibly controlled through the tensioning components, enabling active deformation tests on the bridge deck. This improves the automation level of the device. The cable-stayed bridge model with active deformation control function can verify the feasibility of active deformation control methods in cable-stayed structure systems. By placing and connecting the bridge piers and the bridge deck, the bridge deck can move upward relative to the bridge piers, greatly increasing the range of movement of the bridge deck relative to the bridge piers. This is beneficial for broadening the range of changes in the bridge deck's alignment, thereby expanding the test range and the diversity of data acquisition.

[0008] Further specified, the bridge piers and bridge deck are connected by sliding hinge supports. The sliding hinge support includes a top plate, a bottom plate, and a sliding rod. The top plate is fixed to the bottom surface of both ends of the bridge pier, and the bottom plate is fixed to the top of the bridge pier. Sliding grooves for the sliding rod are correspondingly opened on both the top plate and the bottom plate. The sliding grooves are opened along the left and right directions of the bridge deck. When the sliding rod contacts the top plate and the bottom plate, there is a gap between the top plate and the bottom plate. By setting the top plate, the bottom plate, and the sliding rod, and opening the sliding grooves on the opposite surfaces of the top plate and the bottom plate, a sliding hinge support is formed. The sliding rod can prevent the entire bridge deck from moving along its length. The structure is simple, and the bridge deck can be directly placed on the bridge pier so that the top plate and the sliding rod cooperate. It is convenient to use.

[0009] Further defining the tensioning components, multiple sets of tensioning components are symmetrically arranged about the bridge tower. Each set of tensioning components includes a stay cable, a tensioning actuator, and a mounting base. One end of the stay cable is fixedly connected to the bridge tower, and the other end is fixedly connected to the piston rod end of the tensioning actuator. The mounting base is fixedly set on the bridge deck and includes two spaced-apart hinge lugs. The bottom end of the tensioning actuator is provided with a hinge block that fits with the gap between the two hinge lugs. The tensioning actuator is rotatably connected to the mounting base by a pin passing through the hinge block and the hinge lugs. The closer the stay cable is to the bridge tower, the lower its fixed position on the bridge tower.

[0010] Further defining the monitoring system, it includes displacement sensors, cable force sensors, and strain sensors. The displacement sensors are fixedly mounted on the bottom surface of the bridge deck at the corresponding mounting positions. The cable force sensors are fixedly mounted on the ends of the stay cables away from the bridge towers. The cable force sensors and tensioning actuators are connected by S-hooks. The strain sensors are also spaced along the length of the bridge deck on the bottom surface of the bridge deck and are offset from the displacement sensors.

[0011] By installing displacement sensors, cable force sensors, and strain sensors, it is possible to monitor bridge deck data more comprehensively during the operation of the tensioning actuator.

[0012] Further defining the control system, it includes a data acquisition module, a data transmission module, and a control module; the data acquisition module is electrically connected to the displacement sensor, cable force sensor, and strain sensor; the data acquisition module is signal-connected to the control module through the data transmission module; and the control module is electrically connected to the tensioning actuator.

[0013] The data acquisition module is used to collect data from displacement sensors, cable force sensors, and strain sensors, and transmits the data to the control module through the data transmission module. The control module then adjusts the tensioning actuator based on the collected data.

[0014] Further specified, a through-hole is provided in the middle of the bridge deck for the bridge tower to pass through, and the upper part of the bridge tower passes through the through-hole of the bridge deck and is located above the middle of the bridge deck.

[0015] The beneficial effects of this utility model are as follows: by setting tensioning components to connect the bridge deck and the bridge tower, the tensioning components can be controlled to realize the active deformation test of the bridge deck. Furthermore, the setting of a monitoring system and a control system makes the automation level of the entire model higher. Moreover, by moving the bridge deck and the piers together, the bridge deck can make vertical relative displacement with respect to the piers, which increases the range of movement of the bridge deck relative to the piers and is more conducive to widening the range of changes in the bridge deck's linear shape. Attached Figure Description

[0016] Figure 1 This is a simplified structural diagram of the present invention from a frontal view. Figure 2 This is a partial structural diagram of the tensioning assembly; Figure 3 This is a schematic diagram showing the connection between the stay cables and the bridge towers; Figure 4 A schematic diagram of the structure in which the bridge pier and the bridge deck are viewed from the front. Figure 5 A schematic diagram of the structural relationship between the bridge pier and the bridge deck from a side view. Figure 6 This is a schematic diagram of the installation structure between the mounting base and the bridge deck; Figure 7 This diagram shows the electrical component connections between the monitoring system, the control system, and the tensioning actuator.

[0017] The symbols for each component are as follows: Bridge deck 1, diaphragm 11, pier 2, tower 3, tensioning assembly 4, stay cable 41, tensioning actuator 42, mounting base 43, S-hook 44, anchor 45, monitoring system 5, displacement sensor 51, cable force sensor 52, strain sensor 53, control system 6, data acquisition module 61, data transmission module 62, control module 63, sliding hinge support 7, top plate 71, bottom plate 72, sliding rod 73, sliding groove 74. Detailed Implementation

[0018] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0019] Example: like Figures 1-7As shown, a test model of a cable-stayed bridge with bridge deck alignment adjustment function includes a bridge deck 1, piers 2, bridge towers 3, tensioning components 4, a monitoring system 5, and a control system 6. The bottom of the bridge deck 1 is provided with transverse diaphragms 11 extending along the width direction of the bridge deck 1 at intervals along its length. Piers 2 are vertically located at both ends of the bridge deck 1 to support it. Piers 2 are connected to the bridge deck 1 so that the bridge deck 1 can move relative to the piers 2 in the vertical direction. Piers 2 and the bridge deck 1 are connected by sliding hinge supports 7, which include a top plate 71, a bottom plate 72, and a sliding rod 73. The top plate 71 is fixed to the bottom surface of both ends of the pier 2, and the bottom plate 72 is fixed to the top of the pier 2. Both the top plate 71 and the bottom plate 72 are provided with corresponding sliding grooves 74 for placing the sliding rod 73. The sliding grooves 74 are opened along the left and right directions of the bridge deck 1. When the sliding rod 73 contacts the top plate 71 and the bottom plate 72, there is a gap between the top plate 71 and the bottom plate 72. A through hole for the bridge tower 3 to pass through is opened in the middle of the bridge deck 1. The upper part of the bridge tower 3 passes through the through hole of the bridge deck 1 and is located above the middle of the bridge deck 1. The tensioning assembly 4 is used to tension the bridge deck 1. The tensioning assembly 4 is provided in multiple sets, and the multiple sets of tensioning assemblies 4 are symmetrically arranged about the bridge tower 3. Each set of tensioning assemblies 4 includes a stay cable 41, a tensioning actuator 42, and a mounting base 43. The end of the stay cable 41 near the bridge tower 3 is fixedly connected to the bridge tower 3 by an anchor 45. Mounting base 43 is fixed to the bridge deck 1 by bolts. Mounting base 43 includes two spaced-apart hinge lugs. The bottom end of tensioning actuator 42 is provided with a hinge block that fits with the gap between the two hinge lugs. Tensioning actuator 42 is rotatably connected to mounting base 43 by a pin passing through the hinge block and hinge lugs. The closer the stay cable 41 is to the bridge tower 3, the lower its fixed position on the bridge tower 3. Monitoring system 5 is installed on bridge deck 1 and tensioning assembly 4. Monitoring system 5 is used to monitor the displacement of bridge deck 1, the applied force of tensioning assembly 4, and to collect strain data of bridge deck 1. Monitoring system 5 includes displacement sensor 51, cable force sensor 52, and strain sensor 53. Displacement sensor 51 corresponds to mounting base 4. The cable tension sensor 52 is fixedly installed on the bottom surface of the bridge deck 1. The cable tension sensor 52 is fixedly installed at the end of the cable 41 away from the bridge tower 3. The cable tension sensor 52 and the piston rod end of the tension actuator 42 are connected by an S-hook 44. The strain sensor 53 is also spaced along the length of the bridge deck 1 on the bottom surface of the bridge deck 1 and is offset from the displacement sensor 51. The control system 6 includes a data acquisition module 61, a data transmission module 62 and a control module 63. The data acquisition module 61 is electrically connected to the displacement sensor 51, the cable tension sensor 52 and the strain sensor 53. The data acquisition module 61 is connected to the control module 63 via the data transmission module 62. The control module 63 is electrically connected to the tension actuator 42.

[0020] In this application, the tensioning actuator 42 is an electric push rod; the displacement sensor 51 is a percentage, linear variable differential transformer, optical displacement sensor 51, ultrasonic displacement sensor 51 or other types of displacement sensor 51; the cable force sensor 52 is a column-type tension sensor, fiber optic tension sensor, piezoelectric tension sensor or other types of cable force sensor 52; the strain sensor 53 is a resistance strain gauge, piezoelectric strain sensor, fiber optic grating metal strain sensor, thin film strain sensor or other types of strain sensor.

[0021] By setting up tensioning components 4, monitoring system 5, and control system 6, and connecting bridge tower 3 and bridge deck 1 through tensioning components 4, the tension of the cables can be flexibly controlled by controlling tensioning components 4, enabling active deformation testing of bridge deck 1. This improves the automation level of the device. The cable-stayed bridge model with active deformation control function can verify the feasibility of active deformation control methods in cable-stayed structure systems. By placing and connecting bridge pier 2 and bridge deck 1, bridge deck 1 can move upward relative to bridge pier 2, greatly increasing the range of movement of bridge deck 1 relative to bridge pier 2. This is beneficial to broaden the range of linear changes of bridge deck 1, thereby broadening the test range and the diversity of data acquisition. By setting up top plate 71, bottom plate 72, and sliding rod 73, and on top plate 71... A sliding groove 74 is formed on the opposite surface of the base plate 72 to form a sliding hinge support 7. The sliding rod 73 can prevent the bridge deck 1 from moving along its length. The structure is simple. The bridge deck 1 can be placed directly on the pier 2 and the top plate 71 can be matched with the sliding rod 73. It is easy to use. By setting displacement sensor 51, cable force sensor 52 and strain sensor 53, the data of bridge deck 1 during the operation of tensioning actuator 42 can be monitored more comprehensively. The data acquisition module 61 is used to collect the data collected by displacement sensor 51, cable force sensor 52 and strain sensor 53, and transmit the data to control module 63 through data transmission module 62. The control module 63 adjusts tensioning actuator 42 according to the collected data.

[0022] The cable-stayed bridge test model of this utility model is a single-tower, double-span, single-cable-plane floating system. The main steel beam of the bridge deck 1 in the model is made of standard carbon structural steel as a whole. A transverse diaphragm 118 is set at a certain distance to enhance the lateral connection of the bridge deck 1. The bridge tower 3 is made of standard channel steel. Three installation holes are opened on the bridge tower 3 so that the three sets of cable stays 41 can pass through the installation holes and be anchored to the bridge tower 3 by anchors 45. The bottom of the bridge tower 3 is supported to stabilize it on the ground. The pier 2 is a frame pier, including the bridge deck 1, the pier 2, the transverse diaphragm 11 and the bottom plate 72, all of which are welded from standard carbon structural steel.

Claims

1. A test model for a cable-stayed bridge with adjustable bridge deck alignment, characterized in that, include: Bridge surface (1); The bridge pier (2) is vertically located at both ends of the bridge deck (1) to support the bridge deck (1). The bridge pier (2) is connected to the bridge deck (1) so that the bridge deck (1) can move relative to the bridge pier (2) in the vertical direction. Bridge tower (3) is vertically located in the middle of the bridge deck (1); The tensioning component (4) is connected at both ends to the bridge tower (3) and the bridge deck (1) respectively, and performs tensioning action on the bridge deck (1); A monitoring system (5) is installed on the bridge deck (1) and the tensioning assembly (4). The monitoring system (5) is used to monitor the displacement of the bridge deck (1), the applied force of the tensioning assembly (4), and to collect the strain data of the bridge deck (1). The control system (6) is electrically connected to the monitoring system (5) and the tensioning assembly (4).

2. The cable-stayed bridge test model with bridge deck alignment adjustment function according to claim 1, characterized in that, The pier (2) and the bridge deck (1) are connected by a sliding hinge support (7). The sliding hinge support (7) includes a top plate (71), a bottom plate (72) and a sliding rod (73). The top plate (71) is fixedly installed on the bottom surface of both ends of the pier (2), and the bottom plate (72) is fixedly installed on the top of the pier (2). The top plate (71) and the bottom plate (72) are respectively provided with sliding grooves (74) for the sliding rod (73) to be placed. The sliding grooves (74) are opened along the left and right directions of the bridge deck (1). When the sliding rod (73) contacts the top plate (71) and the bottom plate (72), there is a gap between the top plate (71) and the bottom plate (72).

3. The cable-stayed bridge test model with bridge deck alignment adjustment function according to claim 2, characterized in that, The tensioning assembly (4) is provided with multiple sets of tensioning assemblies (4) symmetrically arranged about the bridge tower (3). Each set of tensioning assemblies (4) includes a stay cable (41), a tensioning actuator (42), and a mounting base (43). One end of the stay cable (41) is fixedly connected to the bridge tower (3), and the other end is fixedly connected to the piston rod end of the tensioning actuator (42). The mounting base (43) is fixedly set on the bridge deck (1). The mounting base (43) includes two spaced hinge ears. The bottom end of the tensioning actuator (42) is provided with a hinge block that fits with the gap between the two hinge ears. The tensioning actuator (42) is rotatably connected to the mounting base (43) by passing through the hinge block and the hinge ears with a pin. The closer the stay cable (41) is to the bridge tower (3), the lower its fixed position on the bridge tower (3).

4. The cable-stayed bridge test model with bridge deck alignment adjustment function according to claim 3, characterized in that, The monitoring system (5) includes a displacement sensor (51), a cable force sensor (52), and a strain sensor (53). The displacement sensor (51) is fixedly installed on the bottom surface of the bridge deck (1) at the position corresponding to the mounting base (43). The cable force sensor (52) is fixedly installed at the end of the stay cable (41) away from the bridge tower (3). The cable force sensor (52) and the tensioning actuator (42) are connected by an S-hook (44). The strain sensor (53) is also spaced along the length of the bridge deck (1) on the bottom surface of the bridge deck (1) and is offset from the displacement sensor (51).

5. The cable-stayed bridge test model with bridge deck alignment adjustment function according to claim 4, characterized in that, The control system (6) includes a data acquisition module (61), a data transmission module (62), and a control module (63). The data acquisition module (61) is electrically connected to the displacement sensor (51), the cable force sensor (52), and the strain sensor (53). The data acquisition module (61) is signal-connected to the control module (63) through the data transmission module (62). The control module (63) is electrically connected to the tensioning actuator (42).

6. The cable-stayed bridge test model with bridge deck alignment adjustment function according to claim 1, characterized in that, The bridge deck (1) has a through hole in the middle for the bridge tower (3) to pass through. The upper part of the bridge tower (3) passes through the through hole of the bridge deck (1) and is located above the middle of the bridge deck (1).

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