Bridge deck slab connecting section stress self-adjusting device and bridge deck slab connecting structure
By setting up a stress self-adjusting device on the bridge deck connection section to monitor and adjust stress in real time, the problem of traditional technology being difficult to cope with extreme environmental changes is solved, the stability and safety of the bridge are improved, and maintenance costs are reduced.
Patent Information
- Application Number
- CN202421273432.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-05
AI Technical Summary
Traditional bridge deck connection technology is difficult to monitor and adjust the stress status of the connection section in real time, resulting in damage or accidents in bridge structures when there are extreme or unexpected environmental changes, and the maintenance and repair are difficult and costly.
A self-adjusting device for stress adjustment of bridge deck connection sections is designed. By setting a winding wheel, a adjustment rope and a servo motor on both sides of the connection section, and a tension sensor is set on the adjustment rope, and a pressure sensor is set on the connection surface of the bridge deck to monitor and adjust the stress of the connection section in real time.
Realize instant response of bridges under various environmental and load changes, reduce structural damage and failure rates caused by improper stress, improve the stability and safety of bridges, and reduce maintenance costs.
Smart Images
Figure CN222666559U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of civil engineering bridge construction, in particular to a bridge deck connecting section stress self-adjusting device and a bridge deck connecting structure. Background Art
[0002] In modern bridge engineering, connection technology is a core element in ensuring structural integrity and stability. Bridges are subject to numerous factors during daily operation, including heavy vehicle loads, temperature fluctuations, and natural aging. Traditional bridge deck connection methods, which mostly utilize reinforced concrete structures, are able to withstand and distribute the forces acting on the bridge to a certain extent. However, these connection structures rely primarily on the physical properties of the material itself to adapt to environmental and load changes. This passive adaptation mechanism often proves insufficient in extreme or unusual environmental conditions, and cannot effectively cope with long-term or sudden structural stress changes. This makes traditional bridge deck connection technology relatively reliable only in routine applications, but still has some shortcomings in special circumstances. For example, traditional bridge deck connection technology struggles to monitor and adjust the stress state of the connection section in real time, potentially leading to structural damage or accidents after long-term use. Furthermore, due to the lack of effective stress adjustment mechanisms, traditional connection methods often lack adaptability and responsiveness to unexpected environmental changes, such as extreme weather conditions or unusual traffic loads. These technical limitations not only affect the safety and reliability of bridges but also increase the difficulty and cost of maintenance and repair. Utility Model Content
[0003] In order to overcome the above-mentioned problems existing in the prior art, the present application provides a self-adjusting device for the stress of the bridge deck connection section; the self-adjusting device for the stress is provided by arranging a winding wheel, an adjusting rope and a servo motor on both sides of the connection section, and arranging a tension sensor on the adjusting rope, and arranging a pressure sensor on the connection surface of the bridge deck, which are respectively used to monitor the tension of the adjusting rope and the pressure on both sides of the connection section in real time, so that the stress required for the connection section can be calculated by analyzing the two data of tension and pressure, and then the tension of the adjusting rope is adjusted by the servo motor to indirectly control the stress level of the bridge deck connection section, thereby reducing structural damage and failure rate caused by improper stress, and this active adjustment mechanism enables the manufactured bridge to respond instantly to various environmental and load changes, thereby improving the stability and safety of the bridge. Correspondingly, the present application also provides a bridge deck connection structure that can control the stress state of the bridge deck connection section.
[0004] For the stress self-adjusting device, the technical solution of this application is:
[0005] The bridge deck connecting section stress self-adjusting device includes two sets of stress self-adjusting components arranged on both sides of the connecting section; the connecting section includes a group of connecting steel bars and elastic concrete arranged between two adjacent bridge decks; a group of piezoelectric sensors are arranged at intervals on the connecting surface of the bridge deck for monitoring the pressure on both sides of the elastic concrete; the stress self-adjusting component includes two winding wheels arranged on the sides of two adjacent bridge decks and an adjustment rope sleeved on the two winding wheels; one end of the adjustment rope extends out of the winding wheel and is connected to the rotating shaft of the servo motor; the adjustment rope is provided with a tension sensor for detecting the tension of the adjustment rope.
[0006] Compared with the prior art, the bridge deck connection section stress self-adjusting device of the present application arranges a winding wheel, an adjusting rope and a servo motor on both sides of the connection section, so that the tension of the adjusting rope can directly affect the stress of the bridge deck connection section. At the same time, a tension sensor is arranged on the adjusting rope, and a pressure sensor is arranged on the connection surface of the bridge deck, which are respectively used to monitor the tension of the adjusting rope and the pressure on both sides of the connection section in real time; when in use, the stress required for the connection section can be calculated by analyzing the two data of tension and pressure, and then the servo motor adjusts the tension of the adjusting rope according to the calculation result (the servo motor's shaft rotates to tighten or loosen the adjusting rope), indirectly controlling the stress level of the bridge deck connection section, thereby reducing structural damage and failure rate caused by improper stress and extending the service life of the bridge. Moreover, this active adjustment mechanism enables the bridge to respond instantly to various environmental and load changes, thereby improving the stability and safety of the bridge; in addition, the use of the servo motor ensures the accuracy and rapidity of the adjustment process, reduces manual intervention, and reduces maintenance costs.
[0007] As an optimization, in the aforementioned bridge deck joint stress self-adjusting device, the piezoelectric sensors are evenly spaced near the centerline of the joint surface, with the spacing between adjacent piezoelectric sensors no greater than 20 cm. This specific distribution of the piezoelectric sensors improves the accuracy of pressure detection on both sides of the joint.
[0008] As an optimization, in the aforementioned bridge deck connection section stress self-adjusting device, the winding wheel is provided with an annular groove, and the adjustment rope is positioned within the annular groove. This ensures that the adjustment rope remains stable on the winding wheel when pulled, preventing it from falling off the winding wheel. Furthermore, the adjustment rope can be a steel strand. Steel strands offer stable quality, excellent corrosion resistance, and high tensile strength, adapting to various environmental requirements, resisting damage after prolonged use, and offering low processing costs.
[0009] As an optimization, in the aforementioned bridge deck connection section stress self-adjusting device, the winding wheel and the bridge deck are integrally formed by casting, which has a simple structure and is easy to manufacture.
[0010] As for the connection structure, the technical solution of this application is:
[0011] A bridge deck connection structure comprises at least two bridge decks and a connection section arranged between two adjacent bridge decks; the connection section comprises a group of connecting steel bars and elastic concrete arranged between the two adjacent bridge decks; a group of piezoelectric sensors are arranged at intervals on the connection surface of the bridge decks for monitoring the pressure on both sides of the elastic concrete; a set of stress self-adjusting components is respectively provided on both sides of the elastic concrete; the stress self-adjusting components comprise two winding wheels arranged on the sides of two adjacent bridge decks and an adjustment rope sleeved on the two winding wheels; one end of the adjustment rope extends out of the winding wheel and is connected to the rotating shaft of the servo motor; the adjustment rope is provided with a tension sensor for detecting the tension of the adjustment rope.
[0012] Compared with the existing technology, in the bridge deck connection structure of the present application, the connection section is composed of connecting steel bars and elastic concrete, and a winding wheel, an adjusting rope and a servo motor are respectively provided on both sides of the connection section. The specific structure enables the tension of the adjusting rope to directly affect the stress of the bridge deck connection section. At the same time, a tension sensor is provided on the adjusting rope, and a pressure sensor is provided on the connection surface of the bridge deck, which are respectively used to monitor the tension of the adjusting rope and the pressure on both sides of the connection section in real time; thereby, the stress required for the connection section can be calculated by analyzing the two data of tension and pressure, and then the tension of the adjusting rope is adjusted by the servo motor to indirectly control the stress level of the bridge deck connection section, so as to reduce structural damage and failure rate caused by improper stress and improve the stability and safety of the bridge.
[0013] As an optimization, in the aforementioned bridge deck connection structure, the piezoelectric sensors are evenly spaced near the center line of the connection surface, and the spacing between two adjacent piezoelectric sensors does not exceed 20 cm. Furthermore, an annular groove is provided on the winding wheel, and the adjusting rope is located in the annular groove. In this way, it can be ensured that the adjusting rope can be stabilized on the winding wheel when it is pulled, and prevented from falling off the winding wheel. Furthermore, the adjusting rope can be a steel strand. The quality of steel strand is stable, the corrosion resistance is good, the tensile strength is high, it can adapt to various environmental requirements, it is not easy to be damaged after long-term use, and the processing cost is low. Furthermore, the winding wheel and the bridge deck are integrally formed by casting. At this time, the structure is simple and the manufacturing is convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the bridge deck connection section stress self-adjusting device of the present application;
[0015] Figure 2 yes Figure 1 Schematic diagram of the stress self-adjusting device in unfilled elastic concrete.
[0016] The markings in the accompanying drawings are: 1-bridge deck, 11-connecting surface; 2-connecting steel bars; 3-elastic concrete; 4-piezoelectric sensor; 5-stress self-adjusting component, 51-winding wheel, 511-annular groove, 52-adjusting rope, 53-servo motor, 54-tension sensor. DETAILED DESCRIPTION
[0017] The present application is further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present application.
[0018] Example:
[0019] See also Figure 1 and Figure 2 The bridge deck connecting section stress self-adjusting device includes two sets of stress self-adjusting components 5 arranged on both sides of the connecting section; the connecting section includes a group of connecting steel bars 2 and elastic concrete 3 arranged between two adjacent bridge decks 1 (the elastic concrete 3 is filled between the two adjacent bridge decks 1, and the connecting steel bars 2 are buried in the elastic concrete 3 at a certain interval); a group of piezoelectric sensors 4 are arranged at intervals on the connecting surface 11 of the bridge deck 1 for monitoring the pressure on both sides of the elastic concrete 3; the stress self-adjusting component 5 includes two winding wheels 51 arranged on the sides of two adjacent bridge decks 1 and an adjusting rope 52 sleeved on the two winding wheels 51; one end of the adjusting rope 52 extends out of the winding wheel 51 and is connected to the rotating shaft of the servo motor 53; the adjusting rope 52 is provided with a tension sensor 54 for detecting the tensioning force of the adjusting rope 52.
[0020] In this embodiment, the piezoelectric sensors 4 are evenly spaced near the centerline of the connection surface 11, with a spacing of 15 cm between adjacent piezoelectric sensors 4. The connecting steel bars 2 are positioned between adjacent piezoelectric sensors 4. This improves the accuracy of pressure detection on both sides of the connection. Furthermore, the piezoelectric sensors 4 measure 10 cm x 10 cm and are 1 cm thick, and are adhesively fixed to the connection surface 11.
[0021] In this embodiment, the winding reel 51 is provided with an annular groove 511, within which the adjustment rope 52 is positioned. This ensures that the adjustment rope remains stable on the winding reel when pulled, preventing it from falling off. Furthermore, the adjustment rope 52 is a steel strand with a diameter of 15.24 mm, a 1x7 structure, and a strength of 1860 MPa.
[0022] In this embodiment, the winding wheel 51 is integrally formed with the bridge deck 1 by casting. This has a simple structure and is easy to manufacture. Furthermore, the diameter of the winding wheel 51 is 40 cm.
[0023] As a specific application of the bridge deck connection section stress self-adjusting device of this embodiment:
[0024] A bridge deck connection structure includes at least two bridge decks and a connection section arranged between two adjacent bridge decks; the connection section includes a group of connecting steel bars and elastic concrete arranged between the two adjacent bridge decks; the connection section is provided with the aforementioned bridge deck connection section stress self-adjusting device of the present application.
[0025] The steps for adjusting the stress of the connecting section are as follows:
[0026] (1) The piezoelectric sensor 4 and the tension sensor 54 send the monitored pressure values on both sides of the bridge deck 1 connection section and the tension value of the adjustment rope 52 to the control system; the sensor data reading basic frequency is 0.1 Hz; the difference between the tension and the pressure is calculated to obtain the stress value of the connection section; the stress threshold is set to 80% of the design strength;
[0027] (2) Determine whether the current stress of the connection section exceeds a set threshold; if so, reduce the tension of the adjustment rope 52 and calculate the tension adjustment value required to reduce the stress to below 70% of the design value; then drive the servo motor 53 to tighten or loosen the adjustment rope 52 to adjust the tension of the adjustment rope 52 between the winding wheels 51;
[0028] (3) Verify the pressure data monitored by the piezoelectric sensor 4 on the bridge deck connection surface 11 and the tension data monitored by the tension sensor 54 on the adjustment rope 52 to determine whether the current stress meets the adjustment requirements; if not, increase the sensor sampling frequency by 20% and the tension adjustment amplitude by 20%, and adjust again until the stress meets the adjustment requirements.
[0029] The above general description of the utility model and the description of its specific embodiments involved in this application should not be understood as limiting the technical solutions of the utility model. Based on the disclosure of this application, those skilled in the art may, without violating the constituent elements of the utility model involved, add, subtract or combine the disclosed technical features in the above general description and / or specific embodiments (including examples) to form other technical solutions within the scope of protection of this application.
Claims
1. The bridge deck connection section stress self-adjusting device is characterized by: The invention comprises two sets of self-adjusting stress components (5) arranged on both sides of a connecting section; the connecting section comprises a group of connecting steel bars (2) and elastic concrete (3) arranged between two adjacent bridge decks (1); a group of piezoelectric sensors (4) are arranged at intervals on the connecting surface (11) of the bridge deck (1) for monitoring the pressure on both sides of the elastic concrete (3); the self-adjusting stress component (5) comprises two winding wheels (51) arranged on the sides of two adjacent bridge decks (1) and an adjusting rope (52) sleeved on the two winding wheels (51); one end of the adjusting rope (52) extends out of the winding wheel (51) and is connected to the rotating shaft of a servo motor (53); a tension sensor (54) is arranged on the adjusting rope (52) for detecting the tension of the adjusting rope (52).
2. The bridge deck connection section stress self-adjusting device according to claim 1 is characterized in that: The piezoelectric sensors (4) are distributed at equal intervals near the center line of the connection surface (11), and the distance between two adjacent piezoelectric sensors (4) does not exceed 20 cm.
3. The bridge deck connection section stress self-adjusting device according to claim 1 is characterized in that: The winding wheel (51) is provided with an annular groove (511), and the adjustment rope (52) is located in the annular groove (511).
4. The bridge deck connection section stress self-adjusting device according to claim 3 is characterized in that: The adjusting rope (52) is a steel strand.
5. The bridge deck connection section stress self-adjusting device according to claim 1 is characterized in that: The winding wheel (51) and the bridge deck (1) are integrally formed by casting.
6. The bridge deck connection structure is characterized by: The invention comprises at least two bridge decks (1) and a connecting section arranged between two adjacent bridge decks (1); the connecting section comprises a group of connecting steel bars (2) and elastic concrete (3) arranged between the two adjacent bridge decks (1); a group of piezoelectric sensors (4) are arranged at intervals on the connecting surface (11) of the bridge deck (1) for monitoring the pressure on both sides of the elastic concrete (3); a set of stress self-adjusting components (5) are respectively arranged on both sides of the elastic concrete (3); the stress self-adjusting components (5) comprise two winding wheels (51) arranged on the sides of the two adjacent bridge decks (1) and an adjusting rope (52) sleeved on the two winding wheels (51); one end of the adjusting rope (52) extends out of the winding wheel (51) and is connected to the rotating shaft of a servo motor (53); a tension sensor (54) is arranged on the adjusting rope (52) for detecting the tension of the adjusting rope (52).
7. The bridge deck connection structure according to claim 6, characterized in that: The piezoelectric sensors (4) are distributed at equal intervals near the center line of the connection surface (11), and the distance between two adjacent piezoelectric sensors (4) does not exceed 20 cm.
8. The bridge deck connection structure according to claim 6, characterized in that: The winding wheel (51) is provided with an annular groove (511), and the adjustment rope (52) is located in the annular groove (511).
9. The bridge deck connection structure according to claim 8, characterized in that: The adjusting rope (52) is a steel strand.
10. The bridge deck connection structure according to claim 6, characterized in that: The winding wheel (51) and the bridge deck (1) are integrally formed by casting.