Highway bridge anti-seismic telescopic apparatus

Abstract

The invention belongs to the technical field of bridge telescopic apparatuses, and particularly relates to a highway bridge anti-seismic telescopic apparatus. The highway bridge anti-seismic telescopic apparatus comprises supporting displacement boxes which are respectively arranged on two ends of a bridge telescopic seam, wherein a telescopic body consisting of a plurality of middle longitudinalbeams and supporting crossbeams which are connected with the middle longitudinal beams in a sliding manner is arranged between the supporting displacement boxes, the middle longitudinal beams disposedon two sides of the telescopic body are connected with the supporting displacement boxes by virtue of an edge longitudinal beam, two ends of the supporting crossbeams respectively stretch into the supporting displacement boxes and are connected by virtue of a non-directional rotating supporting seat, the non-directional rotating supporting seat is a fixed supporting seat which is arranged betweenthe supporting crossbeam and the supporting displacement box by virtue of a spherical sliding or columnar sliding, the fixed supporting seat comprises an upper supporting seat body and a lower supporting seat body with a center limiting mechanism, the limiting mechanism is arranged between the upper supporting seat body and the lower supporting seat body and consists of a center pin shaft and a receiving hole for limiting the swinging of the center pin shaft. The telescopic apparatus has the characteristics of multi-angle rotation of a bridge, seismic resistance and shock resistance and gooddamping and noise reduction effect.

Description

technical field [0001] The invention belongs to the technical field of bridge telescopic devices, in particular to an anti-seismic telescopic device for highway bridges, and is especially suitable for modular bridge telescopic devices. Background technique [0002] The expansion body of the modular expansion device is composed of special-shaped steel beams and unit rubber sealing belts, and is suitable for highway and bridge projects with expansion and contraction of 80~1200mm. The expansion device is an important component of the highway bridge, which directly affects the reliability of the expansion and the safety performance of the bridge. [0003] Traditional expansion devices include pure rubber type, plate type, and combined type. These structures have limited expansion and expansion, and are not suitable for highway bridges with large expansion and expansion. They are simple in structure and single in function. After use, the maintenance cost is high and the repair is...

AI Technical Summary

Problems solved by technology

[0003] Traditional telescopic devices include pure rubber type, plate type, and combined type. These structures have limited telescopic capacity and are not suitable for highway bridges with large telescopic capacity. They are simple in structure and single in function. After use, maintenance costs are high and repairs are cumbersome.

In contrast, the modular expansion device is widely used because it can achieve a large amount of expansion, but the existing modular expansion device does not have the function of multi-angle rotation, and it cannot realize that the main beams on both sides will be at the expansion joint. Larger longitudinal, horizontal, and vertical relative displacements will easily cause wear and tear on the expansion device, and even damage the main structure of the bridge, making it difficult to have anti-seismic and impact resistance; secondly, the adjacent steel sections of the bridge expansion device and the supporting beam Rigid contact between the displacement box and the displacement box during the expansion and contraction process, the collision impact will easily lead to damage to the internal parts of the expansion device, and there is no effective collision damping mechanism to provide effective buffering between them

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