A bridge telescopic device that satisfies three-dimensional displacement and resultant force torsion

Abstract

The invention relates to a bridge expansion device capable of meeting the requirements on three-dimensional displacement and resultant distortion, which comprises a joint crossing plate on a bridge. A fixed end of the joint crossing plate is in sleeved connection with a rotating shaft through a U-shaped bolt. The rotating shaft is fixedly connected with a displacement box. The displacement box is fixedly connected with a bridge body embedded reinforcing bar. A telescopic end of the joint crossing plate is in comb-type connection with a fixed plate. The fixed plate is fixedly connected with the bridge body embedded reinforcing bar through a bolt. A telescopic device can freely extend and retract in the longitudinal direction. In the transverse direction, the U-shaped bolt is connected with the rotating shaft in a sleeved point contact mode, so that the transverse displacement and the transverse rotation are not restrained. In the vertical direction, the vertical displacement and rotation are met also by the connection of the U-shaped bolt with the rotating shaft. When the bridge is acted by external forces, the combination of forces in all directions generates the resultant effect with undetermined direction on the bridge and the resultant distortion with undetermined direction occurs to the upper structure of the bridge. By the sleeved point contact between the U-shaped bolt and the rotating shaft, the bridge expansion device has the characteristics of meeting the multidirectional displacement of the bridge under the action of the external forces such as a load, the wind, an earthquake and the like.

Description

technical field [0001] The invention belongs to the technical field of transportation facilities, and in particular relates to a bridge telescopic device that satisfies three-dimensional displacement and resultant force torsion. Background technique [0002] Existing telescopic devices are divided into two categories: modular type and modular type. The modular type is mainly based on comb-tooth plates, and the modular type is mainly based on section steel. None of the existing technologies can satisfy the multi-directional displacement function of the bridge under load, wind, earthquake and other external forces. Contents of the invention [0003] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a bridge telescopic device that satisfies three-dimensional displacement and resultant force torsion, and has the characteristics of satisfying the multi-directional displacement of the bridge under load, wind...

AI Technical Summary

Problems solved by technology

None of the existing technologies can meet the function of multi-directional displacement of the bridge under load, wind, earthquake and other external forces

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