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What are the advantages of pot type rubber bearings for highway bridges

Source：m.ev18b.cn Release date： 2024-11-13

The pot type rubber bearings for highway bridges have the following advantages: 1.Large carrying capacity: Structural design support: The pot type rubber bearing adopts a structure composed of steel components and rubber, and the steel pelvic cavity provides a strong support frame that can withstand the huge vertical loads transmitted by the upper structure of the bridge. Compared with othe

The pot type rubber bearings for highway bridges have the following advantages:
1.Large carrying capacity:
Structural design support: The pot type rubber bearing adopts a structure composed of steel components and rubber, and the steel pelvic cavity provides a strong support frame that can withstand the huge vertical loads transmitted by the upper structure of the bridge. Compared with other types of bearings, such as plate rubber bearings, its bearing capacity has been significantly improved, which can meet the needs of large bridges and highway bridges that can withstand heavy traffic.
Material performance guarantee: Rubber has a certain degree of elasticity and deformation ability under compression, which can evenly distribute pressure and prevent local stress concentration when the bearing is subjected to large loads, further ensuring the stability and reliability of the bearing.
2.Large horizontal displacement:
Working principle advantage: By utilizing the low friction coefficient between the polytetrafluoroethylene plate on the middle steel plate and the stainless steel plate on the upper seat plate, the horizontal displacement of the upper structure is achieved. This design enables the support to flexibly adapt to horizontal displacement of the bridge structure caused by factors such as temperature changes, concrete shrinkage and creep, vehicle braking, etc., and the horizontal displacement is relatively large, which can effectively reduce the additional stress generated by the limited horizontal displacement of the bridge structure.
Structural Space Guarantee: The bowl shaped structure provides sufficient space for horizontal displacement, which will not cause damage or failure of the support structure due to displacement, ensuring the safety and stability of the bridge during long-term use.
3.Flexible rotation:
Rubber properties support: The elasticity of rubber allows the support to undergo rotational deformation to a certain extent, while the rubber block in the bowl structure is in a three-dimensional stress state, in which the rubber has fluid like properties, further enhancing the rotational ability of the support.
Structural design coordination: The design of the upper seat plate, bottom basin, and other components of the support cooperate with each other to provide good support and guidance for rotation, so that when the upper structure of the bridge rotates under vehicle loads, wind loads, etc., the support can rotate smoothly, reducing the constraints on the bridge structure and reducing the stress caused by limited rotation of the bridge structure.
4.Simple construction:
Clear component composition: mainly composed of upper seat plate, sealing ring, rubber plate, bottom basin, anchor bolts, dust cover, etc., with a relatively simple structure and clear functions of each component. This simple structure makes the production, processing, installation, and maintenance of bearings relatively convenient, reducing the cost and difficulty of the project.
Easy to understand and design: Engineers have a relatively easy understanding and mastery of pot type rubber bearings when designing bridges. They can quickly and accurately select and design bearings according to the specific requirements of the bridge, improving design efficiency.
5.Low building height: The structure of the pot type rubber bearing is compact and occupies less space, which can effectively reduce the building height of the bridge. For some road sections that require bridge clearance, such as urban roads, underpasses, etc., the advantage of pot type rubber bearings is particularly obvious. It can meet the clearance requirements and reduce the impact on the surrounding environment while ensuring the bearing capacity and performance of the bridge.
6.Strong wear resistance and corrosion resistance:
Material characteristics: The materials used, such as stainless steel plates and polytetrafluoroethylene plates, have good wear resistance. During long-term use, they can maintain a low friction coefficient and good sliding performance, reducing the decline in bearing performance caused by wear.
Sealing design: The design of sealing structures such as sealing rings can effectively prevent moisture, dust, impurities, etc. from entering the interior of the support, avoiding corrosion of steel components and rubber inside the support, and extending the service life of the support.
7.Good economic performance:
Save steel: Compared to other types of bearings such as cast steel bearings, pot type rubber bearings require less steel while meeting the same load-bearing capacity and performance requirements, reducing material costs.
Low maintenance cost: Due to its simple structure and stable performance, the maintenance workload of pot type rubber bearings is relatively small under normal use, resulting in lower maintenance costs. Moreover, when it is necessary to replace the support, the replacement process is relatively simple, which also reduces the cost and difficulty of maintenance.

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What are the advantages of pot type rubber bearings for highway bridges

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