What are the application scenarios of pot type rubber bearings for highway bridges
The pot type rubber bearings for highway bridges have high bearing capacity, flexible rotation, and can adapt to large horizontal displacements. They are mainly used in medium and large-span highway bridge projects with large bearing reaction forces. The specific application scenarios are as follows:
The pot type rubber bearings for highway bridges have high bearing capacity, flexible rotation, and can adapt to large horizontal displacements. They are mainly used in medium and large-span highway bridge projects with large bearing reaction forces. The specific application scenarios are as follows:
1. Continuous beam bridges on highways
The high-speed mainline has continuous box girders and cross river and valley bridges, with high vehicle loads and significant temperature expansion displacement of the beam body. Generally, a fixed bowl shaped support is arranged inside the joint, while other piers and abutments are equipped with unidirectional or bidirectional movable supports, which are adapted to the displacement and rotation caused by temperature changes of the beam and concrete shrinkage and creep, and can withstand long-term heavy vehicle traffic loads.
2. Urban municipal elevated and interchange projects
Urban ring elevated bridge, interchange ramp, inclined bridge, curved bridge. This type of bridge structure is complex in form and requires multi-directional rotation and displacement. Basin type supports can adapt to large longitudinal and transverse slope conditions, ensuring the free rotation of curved and inclined beams, reducing additional structural stress, and are widely used in new elevated and widening renovation projects.
3. Heavy duty trunk bridges on national and provincial highways
Large continuous beam and T-beam bridges on national and provincial highways with large freight volumes have high frequency of heavy vehicle loads and large vertical support reaction forces on the bearings. Therefore, pot type rubber bearings are used instead of plate bearings with limited bearing capacity to stably transmit the upper dead load and vehicle live load.
4. Cross river, cross lake, and cross sea highway bridges
Large span and water area highway bridges can be equipped with anti-corrosion upgraded pot type bearings to cope with salt spray corrosion environments in coastal and lake areas, adapt to large beam expansion and contraction, and resist lateral displacement caused by wind loads.
5. Special highway bridges such as continuous rigid frames and arch bridges
Structures such as large-span continuous rigid frames and truss arch bridges have high reaction forces at the pier top and large beam end angles. They rely on basin type supports to achieve vertical load-bearing and rotational release, reducing stress concentration between the main beam and the pier body.
6. Reinforcement and replacement of bearings for old highway bridges
The renovation project of old and dangerous bridges with aging and failure of the original plate rubber bearings will replace the original bearings to improve the overall bearing capacity, displacement adaptability, and structural stability, and extend the service life of the bridge.
7. Large landscape highway bridges and large-span pedestrian overpasses
Scenic area landscape bridges, large urban pedestrian overpasses, and medium to large-span overpasses have a relatively large self weight, and corresponding bearing capacity specifications of basin type supports are selected to adapt to temperature expansion and small structural corners.
8. Crossing bridges on highways crossing railways and pipelines
Bridges that span highways over railways and oil and gas pipelines have strict requirements for structural safety and deformation control. Basin type supports can stably control the displacement of the beam body, avoiding the impact of upper structure deformation on the facilities below.
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