A full bridge aeroelastic model of a bridge

Abstract

This utility model discloses a full-bridge pneumatic model, relating to the field of bridge model construction technology, and solves the technical problem of not being able to freely adjust the spacing between segments during the construction of a full-bridge pneumatic model. This utility model includes a core beam, multiple segments, and clamps. The core beam passes through the multiple segments, and each segment is equipped with the clamp. The clamp includes a cover plate, a base, and connectors. The cover plate and the base are connected by at least one set of connectors. The core beam is clamped between the cover plate and the base, and the base is connected to the segment. This utility model has advantages such as adjustable segment spacing.

Description

Technical Field

[0001] This utility model belongs to the field of bridge model building technology, specifically relating to a full-bridge pneumatic model. Background Technology

[0002] The full-bridge aeroelastic model test, conducted in a wind tunnel laboratory, fully simulates the turbulence of the atmospheric boundary layer, directly mimicking the aerodynamic response of the bridge structure under turbulent wind speeds. In the bridge model construction, the connection between segments and the core beam is crucial to ensure that the model accurately reflects the structural behavior of the actual bridge during wind tunnel testing. To meet the model's design requirements, achieve the purpose of the wind tunnel experiment, and accurately reflect the characteristics of the bridge structure itself, the segment spacing of the full-bridge aeroelastic model is an important parameter, affecting the accuracy and reliability of the results. Therefore, controlling the segment spacing within an acceptable range during the construction of the full-bridge aeroelastic model is of paramount importance.

[0003] Variations in the spacing between bridge segments affect the aerodynamic shape of the bridge model, thus influencing the distribution and action of wind loads. Excessive spacing can lead to unintended vortices or separation of airflow between segments, affecting the accurate simulation of aerodynamic forces. Changes in segment spacing also affect the overall stiffness and mass distribution of the bridge model, consequently influencing its dynamic characteristics, such as natural frequencies, mode shapes, and damping ratios. These changes directly impact the bridge's vibration response under wind loads. To ensure the accuracy of experimental results, the segment spacing needs to precisely simulate the actual bridge conditions. Inappropriate spacing settings can lead to discrepancies between experimental data and actual bridge behavior, reducing the experimental's reference value. The segment spacing also affects the difficulty of model fabrication and installation. Too tight a spacing may increase the complexity of model fabrication, while too loose a spacing may cause stability issues in the wind tunnel. Adjustments to the segment spacing can also affect the cost and time of the experiment. Therefore, in the full-bridge aeroelastic model test, the spacing between bridge segments needs to be precisely set according to the actual bridge design to ensure that the experiment can accurately reflect the aerodynamic and dynamic behavior of the actual bridge. However, traditional clamps cannot freely adjust the spacing between segments, so controlling the spacing between segments has become a major challenge when building a full-bridge aeroelastic model. Utility Model Content

[0004] In view of this, the present invention provides a full-bridge aeroelastic model to solve the technical problem that the spacing between segments cannot be freely adjusted when building a full-bridge aeroelastic model.

[0005] To solve the aforementioned technical problems, the present invention adopts the following technical solution:

[0006] A full-bridge aeroelastic model includes a core beam, multiple segments, and clamps.

[0007] The core beam runs through multiple segments, and each segment is equipped with the clamp.

[0008] The clamp includes a cover plate, a base, and connectors. The cover plate and the base are connected by at least one set of connectors. The core beam is clamped between the cover plate and the base. The base is connected to the segment.

[0009] In this utility model, it should be noted that the cover plate and the base are connected by two sets of connecting parts. The connecting parts use bolts to achieve a detachable connection between the base and the cover plate. Since the base and the segment are connected, before the bolts are tightened, the position of the base and the cover plate on the core beam can be moved to change the spacing between two adjacent segments, thereby achieving precise segment spacing control.

[0010] Preferably, the base is bonded to the segment, the position between the base and the segment is relatively fixed, and the base can slide on the core beam.

[0011] Preferably, the lower end of the cover plate is provided with a first limiting groove along the longitudinal direction, the upper end of the base is provided with a second limiting groove along the longitudinal direction, the upper end of the core beam is limited by the first limiting groove, and the lower end of the core beam is limited by the second limiting groove.

[0012] After adopting this technical solution, it should be noted that the core beam is U-shaped, and its upper end slides into the first limiting groove at the lower end of the base to restrict the lateral movement of the cover plate. The lower end of the core beam slides into the second limiting groove to restrict the lateral movement of the base. In addition, this setting increases the contact area between the surface of the core beam and the cover plate and the base, which facilitates precise spacing adjustment.

[0013] Preferably, the segment has an inner cavity, and the inner cavity has two transverse second support beams. The clamp is located between the two second support beams, the core beam is located on the two second support beams, and the base is connected to the bottom surface of the inner cavity.

[0014] After adopting this technical solution, it should be noted that the second support frame has a groove in the middle part, and the core beam is placed in the groove. The core beam is supported by the second support beam. In addition, the two ends of the second support beam are connected to the two side walls of the inner cavity in the transverse direction, thereby improving the structural rigidity of the segment.

[0015] Preferably, the lateral width of the clamp is G = (0.1-0.3)·A, and the longitudinal width of the clamp is D = (0.1-0.35)·B.

[0016] Where A is the horizontal width of the segment and B is the vertical width of the segment.

[0017] Preferably, the thickness of the clamp base is F = (0.4-0.8)·C, and the thickness of the cover plate is E = (0.1-0.3)·C.

[0018] Where C is the height of the bridge cross section.

[0019] In this utility model, it should be noted that the larger the height dimension of the bridge section, the greater the inertial force generated when the bridge vibrates, and therefore the greater the force required for the clamp to hold it steady. Thus, the transverse width A = 390mm, the longitudinal width B = 300mm, the bridge section C = 28mm, the transverse width G of the clamp is taken as 52mm, the longitudinal width of the clamp is taken as 33mm, the thickness of the clamp cover plate is E = 6mm, and the thickness of the clamp base is F = 14mm.

[0020] Preferably, the inner cavity is further provided with at least one transverse first support beam, the core beam is disposed on the first support beam, and the first support beam is provided with a connecting plate.

[0021] After adopting this technical solution, it should be noted that the structure and function of the first support beam are basically the same as those of the second support beam. On the one hand, it supports the core beam, and on the other hand, it enhances the segment stiffness. The first support beam has grooves that are the same as those of the second support beam, and the connecting plate is placed between the grooves to enhance the stability of the device.

[0022] Preferably, the clamp is located at the center of the inner cavity.

[0023] After adopting this technical solution, it should be noted that the clamp being located in the center makes it easier to make precise spacing adjustments. In addition, the two second support beams are close to the corresponding two sides of the base and the cover plate. When the clamp position is moved, the second support beams can bear force, which facilitates the movement of the segments.

[0024] Preferably, the inner cavity is provided with two second support beams, which are symmetrically distributed on both sides of the clamp to form a stable support for the core beam.

[0025] Preferably, two connecting rods are provided between the two longitudinal side walls of the inner cavity, and the connecting rods are engaged with the first support beam and the second support beam.

[0026] After adopting this technical solution, it should be noted that the connecting rod also plays a role in enhancing the overall rigidity. The first support beam and the second support beam are provided with slots, and the connecting rod is locked in the slots.

[0027] Furthermore, a first through hole is formed on both longitudinal side walls of the inner cavity, and the core beam passes through the first through hole.

[0028] Preferably, the first and second support beams are provided with second through holes for weight reduction, and the inner cavity is provided with long grooves on both sides for weight reduction.

[0029] In this invention, the number of clamps is m, where m is a natural number greater than 1, and the number of clamps is equal to the number of segments in the full bridge aeroelastic model.

[0030] The principle of segment spacing adjustment in this utility model is as follows:

[0031] Before the bolts are tightened, the position of the base and cover plate on the core beam is moved. The base is bonded to the segment. When the base is moved, the force is transmitted to the segment, thereby changing the spacing between two adjacent segments, thus achieving precise segment spacing control.

[0032] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0033] 1. The present invention provides a full-bridge pneumatic elastic model, which fixes the base of the clamp to the segment, and slides the base and cover plate to the core beam. Before the bolts are tightened, the distance between two adjacent segments can be changed by moving the position of the base and cover plate on the core beam, thereby achieving precise control of the segment spacing. This makes the bridge model more realistic, ensures the accuracy of the test data, and also reduces the test time cost to a certain extent.

[0034] 2. The present invention provides a full-bridge aeroelastic model, which supports the core beam and enhances the rigidity of the device by setting a first support beam and a second support beam. Attached Figure Description

[0035] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0036] Figure 1 This is a schematic diagram of the segmental structure of this utility model;

[0037] Figure 2 This utility model Figure 1 Sectional view along line AA;

[0038] Figure 3 This is a top view of a segment of the present invention.

[0039] Figure label:

[0040] 1-Segment, 101-Inner cavity, 2-Clamp, 201-Cover plate, 202-Base, 203-Connector, 3-Core beam, 4-First support beam, 5-Second support beam, 6-Connecting plate, 7-Connecting rod, 8-Long groove, 9-First through hole, 10-Second through hole. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0042] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] The following is combined with Figures 1-3 This utility model will be described in detail.

[0044] Example 1

[0045] A bridge full-bridge aeroelastic model, such as Figures 1-3 As shown, it includes a core beam 3, multiple segments, and a clamp 2.

[0046] The core beam 3 runs through multiple segments, and each segment is equipped with the clamp 2.

[0047] The clamp 2 includes a cover plate 201, a base 202 and a connector 203. The cover plate 201 and the base 202 are connected by at least one set of connectors 203. The core beam 3 is clamped between the cover plate 201 and the base 202. The base 202 is connected to the segment.

[0048] The base 202 is bonded to the segment, and the position between the base 202 and the segment is relatively fixed. The base 202 can slide on the core beam 3.

[0049] The segment has an inner cavity 101, and the inner cavity 101 has two transverse second support beams 5. The clamp 2 is located between the two second support beams 5. The core beam 3 is located on the two second support beams 5. The base 202 is connected to the bottom surface of the inner cavity 101. The clamp 2 is located at the center of the inner cavity 101.

[0050] The inner cavity 101 is also provided with two transverse first support beams 4, and two second support beams 6 are symmetrically distributed on both sides of the clamp 2. The core beam 3 is provided on the two first support beams 4, and the first support beams 4 are provided with connecting plates 6 to form stable support for the core beam 3.

[0051] Two connecting rods 7 are provided between the two longitudinal side walls of the inner cavity 101, and the connecting rods 7 are engaged with the first support beam 4 and the second support beam 5.

[0052] The inner cavity 101 has a first through hole 9 on each of its two longitudinal sides, and the core beam 3 passes through the first through hole 9.

[0053] The first support beam 4 and the second support beam 5 are both provided with second through holes 10 for weight reduction, and the inner cavity 101 is provided with long grooves 8 on both sides for weight reduction.

[0054] The number of clamps 2 is m, where m is a natural number greater than 1. The number of clamps 2 is equal to the number of segments in the aeroelastic model of the entire bridge.

[0055] In this embodiment, the cover plate 201 and the base 202 are connected by two sets of connectors 203. The connectors 203 use bolts to achieve a detachable connection between the base 202 and the cover plate 201. Since the base 202 is connected to the segment, before the bolts are tightened, the position of the base 202 and the cover plate 201 on the core beam 3 can be moved to change the spacing between two adjacent segments, thereby achieving precise segment spacing control. This makes the bridge model more realistic, ensures the accuracy of the test data, and also reduces the test time cost to a certain extent.

[0056] In addition, the clamp 2 is located in the center, which makes it easier to make precise spacing adjustments. Furthermore, the two second support beams 5 are close to the corresponding two sides of the base 202 and the cover plate 201. When the clamp 2 is moved, the second support beams 5 can bear force, which facilitates the movement of the segments.

[0057] Finally, in this embodiment, the structure and function of the first support beam 4 are basically the same as those of the second support beam 5. On the one hand, it supports the core beam 3, and on the other hand, it enhances the segment stiffness.

[0058] Example 2

[0059] The difference between this embodiment and Embodiment 1 is that, as Figure 2 As shown, the lower end of the cover plate 201 is provided with a first longitudinal limiting groove, the upper end of the base 202 is provided with a second longitudinal limiting groove, the upper end of the core beam 3 is limited by the first limiting groove, and the lower end of the core beam 3 is limited by the second limiting groove.

[0060] In this embodiment, the core beam 3 is U-shaped, with its upper end slidingly engaging with the first limiting groove at the lower end of the base 202 and restricting the lateral movement of the cover plate 201. The lower end of the core beam 3 slidesly engaging with the second limiting groove and restricts the lateral movement of the base 202. In addition, this arrangement increases the contact area between the surface of the core beam 3 and the cover plate 201 and the base 202, making it easier to achieve precise spacing adjustment.

[0061] Example 3

[0062] The difference between this embodiment and embodiment 1 is that the lateral width G of the clamp 2 is (0.1-0.3)·A, and the longitudinal width D of the clamp 2 is (0.1-0.35)·B.

[0063] Where A is the horizontal width of the segment and B is the vertical width of the segment.

[0064] The thickness of the base 202 of the clamp 2 is F = (0.4-0.8)·C, and the thickness of the cover plate 201 is E = (0.1-0.3)·C.

[0065] Where C is the height of the bridge cross section.

[0066] The principle of segment spacing adjustment in this utility model is as follows:

[0067] Before the bolts are tightened, the position of the movable base 202 and the cover plate 201 on the core beam 3 is adjusted. The base 202 is bonded to the segment. When the base 202 is moved, the force is transmitted to the segment, thereby changing the spacing between two adjacent segments, thus achieving precise segment spacing control.

[0068] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bridge full-scale aeroelastic model, characterized by, It includes a core beam (3), multiple segments, and a clamp (2). The core beam (3) runs through multiple segments, and each segment is provided with the clamp (2). The clamp (2) includes a cover plate (201), a base (202) and a connector (203). The cover plate (201) and the base (202) are connected by at least one set of connectors (203). The core beam (3) is clamped between the cover plate (201) and the base (202). The base (202) is connected to the segment.

2. A bridge full-scale aeroelastic model according to claim 1, characterized in that: The lower end of the cover plate (201) is provided with a first longitudinal limiting groove, the upper end of the base (202) is provided with a second longitudinal limiting groove, the upper end of the core beam (3) is limited by the first limiting groove, and the lower end of the core beam (3) is limited by the second limiting groove.

3. A bridge full-scale aeroelastic model according to claim 1 or 2, characterized in that: The segment has an inner cavity (101), and the inner cavity (101) has two transverse second support beams (5). The clamp (2) is located between the two second support beams (5), the core beam (3) is located on the two second support beams (5), and the base (202) is connected to the bottom surface of the inner cavity (101).

4. A bridge full-scale aeroelastic model according to claim 1 or 2, characterized in that: The lateral width G of the clamp (2) is (0.1-0.3)·A, and the longitudinal width D of the clamp (2) is (0.1-0.35)·B. Where A is the horizontal width of the segment and B is the vertical width of the segment.

5. A bridge full-scale aeroelastic model according to claim 1 or 2, characterized in that: The thickness of the base (202) of the clamp (2) is F = (0.4-0.8)·C, and the thickness of the cover plate (201) is E = (0.1-0.3)·C. Where C is the height of the bridge cross section.

6. A bridge full-scale aeroelastic model according to claim 3, characterized in that: The inner cavity (101) is also provided with at least one transverse first support beam (4), the core beam (3) is provided on the first support beam (4), and the first support beam (4) is provided with a connecting plate (6).

7. A bridge full-scale aeroelastic model according to claim 3, characterized in that: The clamp (2) is located at the center of the inner cavity (101).

8. A bridge full-bridge aeroelastic model according to claim 6, characterized in that: The inner cavity (101) is provided with two first support beams (4), which are symmetrically distributed on both sides of the clamp (2).

9. A bridge full-scale aeroelastic model according to claim 6, characterized in that: Two connecting rods (7) are provided between the two longitudinal side walls of the inner cavity (101), and the connecting rods (7) are engaged with the first support beam (4) and the second support beam (5).

10. The bridge full-scale aeroelastic model of claim 3, wherein: The inner cavity (101) has a first through hole (9) on both longitudinal side walls, and the core beam (3) passes through the first through hole (9).

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