Longitudinal elastic constraint multifunctional seismic mitigation and isolation support

Abstract

The invention discloses a longitudinal elastic constraint multifunctional seismic mitigation and isolation support. The support comprises a lower seat plate; a middle seat plate which is in sliding connection with the lower seat plate and is provided with a first cambered surface; a rotating piece which is located on the middle seat plate and provided with a second cambered surface, wherein the second cambered surface makes contact with the first cambered surface; a first limiting device which is installed on the rotating part and abuts against the middle seat plate to limit the first cambered surface to slide relative to the second cambered surface, wherein the connecting strength of the first limiting device and the rotating part is smaller than a preset threshold value; second limiting devices which are installed on the lower seat plate and located on the two sides of the middle seat plate in the longitudinal bridge direction respectively to limit the sliding distance of the middle seat plate in the longitudinal bridge direction; and a restraining device which comprises a connecting assembly and an elastic piece, wherein the connecting assembly is connected with the lower seat plate and the elastic piece. The support has the longitudinal adjustable limiting function and longitudinal elastic constraint, the anti-seismic property is improved, a telescopic adjuster can be omitted for a large-span bridge, the maintenance workload is reduced, and the construction cost and the operation cost can be saved.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a multifunctional shock-absorbing and isolating support with longitudinal elastic constraints. Background technique [0002] Earthquake damage to transportation facilities, especially bridges, is often catastrophic. Therefore, bridges in earthquake areas must take certain anti-seismic measures. For railway long-span continuous girder bridges in earthquake areas, the conventional continuous girder design system is usually adopted at present, that is, fixed supports are set at the main pier, and movable supports are set at the rest of the bridge piers. Large, in order to meet the force requirements of the bridge track, it is often necessary to set up a rail telescopic adjuster. However, the rail telescopic adjuster is costly, difficult to design and construct, and needs to be replaced many times during the entire life cycle of the bridge. Therefore, the installation of the rail t...

AI Technical Summary

Problems solved by technology

However, the rail telescopic adjuster is expensive, difficult to design and construct, and needs to be replaced many times during the entire life cycle of the bridge. Therefore, the installation of the rail telescopic adjuster will lead to an increase in construction costs and operating costs.

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