Bridge structure and expansion joint structure

Abstract

The invention relates to a bridge structure and an expansion joint structure.The bridge structure comprises a main bridge girder and an approach bridge girder, wherein the main bridge girder and the approach bridge girder are arranged at intervals in the longitudinal bridge direction, and a first expansion joint is formed between the main bridge girder and the approach bridge girder; at least one transition small beam which is arranged in the first expansion joint and divides the first expansion joint into at least two second expansion joints; and at least two telescopic devices which are arranged in the two second expansion joints respectively, wherein the two telescopic devices and the transition small beam are arranged in the longitudinal bridge direction, meanwhile, one telescopic device is connected with the main bridge girder and the transition small beam, and the other telescopic device is connected with the transition small beam and the approach bridge girder, so that one large-displacement first expansion joint between the main bridge girder and the approach bridge girder can be changed into two or more small-displacement second expansion joints, the expansion distance of the expansion device can be reduced, and it is guaranteed that the expansion distance of the expansion device is within a safe range.

Description

technical field [0001] The invention relates to the technical field of road and bridge engineering equipment, in particular to a bridge structure and an expansion joint structure. Background technique [0002] With the development of the national economy, it is necessary to build bridges in more large rivers and alpine valleys. Due to the limitation of bridge construction conditions, the span of the bridge structure is getting larger and larger, and the length of the main girder is getting longer and longer. The beam end displacement under external loads such as wind force and live load is relatively large. If the displacement is too large, the use of an expansion joint will have an adverse effect on the expansion joint structure of the bridge. For example, for railway expansion devices, Conventional service performance can be effectively guaranteed by the amount of expansion and contraction that is less than ±600mm. If the expansion amount is greater than ±900mm, there will...

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a bridge structure and an expansion joint structure to solve the relatively large displacement of the beam end of the bridge in the related art. If the displacement is too large, the use of an expansion joint will adversely affect the expansion joint structure of the bridge. The problem

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