Long-span bridge three-sphere frictional sliding shock isolation support saddle

Abstract

The invention relates to a long-span bridge three-sphere frictional sliding shock isolation support in the aspect of bridge engineering field. The support consists of an upper support saddle plate, a movable slide block consisting of an upper segment and a lower segment, a middle sliding disk and a lower support saddle plate and is characterized in that the concave sphere of the upper support saddle plate is connected with the concave sphere of the middle sliding disk by the movable slide block consisting of the upper segment and the lower segment; the upper segment of the middle movable slide block is arranged in the recess of the lower segment; the upper segment and the lower segment are respectively provided with a convex sphere; and the convex sphere of the middle sliding disk is connected with the concave sphere of the lower support saddle plate. Within the range of calculable and controllable displacement range, the long-span bridge three-sphere frictional sliding shock isolation support changes the self rigidity and damping characteristics by the self-adaption behavior of the three spheres; for the multifunction objective or multilevel shock, the self adaptability is beneficial to respectively optimizing given shock isolation systems. The support saddle has simple structure, big vertical bearing capacity, big horizontal displacement, high durability and specific shock isolation mechanism, thereby being suitable for long-span bridges having high demand on shock resistant performance.

Description

Technical field

[0001] The invention relates to a bridge support device, in particular to a three-spherical friction sliding seismic isolation support that can automatically change stiffness and damping applied to long and large bridges. Background technique

[0002] When building bridges in earthquake areas, especially long and large bridges, the impact of potential earthquakes on the bridge must be considered, the seismic design of the bridge must be carried out and special attention must be paid to the seismic detail structure of the bridge structure. The seismic design of bridges mainly includes three categories. One is the traditional seismic design of bridges, which uses structural components to resist and consume seismic energy. The seismic action is used as an additional load in the design and combined with other loads acting on the structure. To design and check whether the structure meets the design and use requirements; the second is the bridge isolation design, which ...

Examples

Embodiment Construction

[0016] The three-spherical friction sliding isolation bearing for long and large bridges is based on the ordinary spherical bearing, and an intermediate sliding disk is added to form a new type of seismic isolation bearing with three sliding friction spherical surfaces and strong adaptive performance. Mainly used for long and large bridges with high seismic performance requirements.

[0017] figure 1 It is a schematic diagram of the three-spherical friction sliding seismic isolation bearing of a long bridge. Such as figure 1 As shown, the three-spherical friction sliding seismic isolation support of a long bridge is composed of an upper support plate 1, a movable sliding block composed of upper and lower balls 4 and 5, a middle sliding plate 7 and a lower support plate 6. The concave spherical surface of the seat plate 1 is connected with the concave spherical surface of the middle sliding plate 7 through the movable sliding block composed of upper and lower ball cavities 4 and...

Technical field

[0001] The invention relates to a bridge support device, in particular to a three-spherical friction sliding seismic isolation support that can automatically change stiffness and damping applied to long and large bridges. Background technique

[0002] When building bridges in earthquake areas, especially long and large bridges, the impact of potential earthquakes on the bridge must be considered, the seismic design of the bridge must be carried out and special attention must be paid to the seismic detail structure of the bridge structure. The seismic design of bridges mainly includes three categories. One is the traditional seismic design of bridges, which uses structural components to resist and consume seismic energy. The seismic action is used as an additional load in the design and combined with other loads acting on the structure. To design and check whether the structure meets the design and use requirements; the second is the bridge isolation design, which ...

Examples

Embodiment Construction

[0016] The three-spherical friction sliding isolation bearing for long and large bridges is based on the ordinary spherical bearing, and an intermediate sliding disk is added to form a new type of seismic isolation bearing with three sliding friction spherical surfaces and strong adaptive performance. Mainly used for long and large bridges with high seismic performance requirements.

[0017] figure 1 It is a schematic diagram of the three-spherical friction sliding seismic isolation bearing of a long bridge. Such as figure 1 As shown, the three-spherical friction sliding seismic isolation support of a long bridge is composed of an upper support plate 1, a movable sliding block composed of upper and lower balls 4 and 5, a middle sliding plate 7 and a lower support plate 6. The concave spherical surface of the seat plate 1 is connected with the concave spherical surface of the middle sliding plate 7 through the movable sliding block composed of upper and lower ball cavities 4 and...

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