Anti-fatigue damage element-replaceable assembled composite beam and construction method

Abstract

The invention discloses an anti-fatigue damage element-replaceable assembled composite beam and belongs to the field of bridge and road building. The composite beam mainly comprises a main structure, anti-fatigue damage elements and bridge deck pavement, wherein the main structure mainly comprises prefabricated high performance concrete bridge decks, high-strength steel beams and concrete post-poured belts; the anti-fatigue damage elements mainly comprise friction type high-strength bolt pairs and rubber sleeves and are used for connecting the prefabricated high performance concrete bridge decks and the high-strength steel beams; and the rubber sleeves are arranged outside the friction type high-strength bolt pairs to ensure that under the action of fatigue loading, the deformation constraint on the friction type high-strength bolt pairs is reduced. The composite beam disclosed by the invention has the advantages that the application range of the composite beam is expanded; the assembly type construction of the composite beam is realized; the performance of the composite beam is increased; the construction time is shortened to a great extent; the construction efficiency is increased; the problems of economy and maintenance convenience in the composite beam operating process are solved; and the maintenance cost of the composite beam and the risk in the using process of the composite beam are reduced.

Description

technical field [0001] The invention relates to the field of bridge structure composite beams, in particular to an assembled composite beam with replaceable fatigue resistance members, which is suitable for composite beams in long-span bridge structures. Background technique [0002] In the traditional steel-concrete composite beam structure, the studs are usually welded to the section steel as shear connectors, and the concrete is poured after the reinforcement mesh is laid and the formwork support is completed. During the production process, the traditional composite beam needs to be completed on site. A series of measures such as the binding and laying of the steel mesh, the support of the formwork and the maintenance of the concrete greatly prolong the construction period and increase the cost. During normal use, the composite beam may cause fatigue damage to the studs under the long-term vehicle load. The fatigue life of the traditional composite beam is not ideal, and ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the traditional composite beam has a large self-weight, which not only limits the inner diameter of the composite beam, but also requires a long repair workload and time after damage, the invention provides an assembled composite beam with replaceable fatigue resistance elements

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