Spherical bearings are a new type of bridge bearing developed on the basis of pot type rubber bearings. Spherical bearings have consistent rotational performance in all directions and are suitable for curved bridges, sloping bridges, inclined bridges, wide bridges, and large-span bridges. Spherical bearings do not have load-bearing rubber blocks and are particularly suitable for low-temperature areas.
The advantages of spherical bearings are reliable force transmission and consistent rotational performance in all directions. They not only have the characteristics of strong bearing capacity and large horizontal displacement of pot type rubber bearings, but also can adapt to the needs of large turning angles, suitable for wide bridges, slope bridges, curved bridges, etc; Due to the absence of rubber blocks in pressure bearing components, there is no influence such as low-temperature brittleness of rubber, making it particularly suitable for low-temperature areas. It is classified into three types: fixed type (GD type), unidirectional type (DX type), and bidirectional type (SX type). According to its weather resistance performance, it is divided into ordinary type (suitable for -25~+60 ºC) and cold resistance type (suitable for -40~+60 ºC).
The vertical reaction force that the support can withstand ranges from 1000kN to 20000kN; The maximum allowable rotation angle of the support is 34 'to 69'; The maximum allowable displacement of the support is 50-150mm in the longitudinal direction of the bridge and 20mm in the transverse direction of the bridge; The friction coefficient of the support is f ≤ 0.05; The horizontal load that the support can withstand is 10% of the vertical reaction force that the support can withstand.
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