Orthotropic steel plate-ultrahigh-performance concrete composite bridge deck structure and construction method thereof

Abstract

The invention discloses an orthotropic steel plate-ultrahigh-performance concrete composite bridge deck structure and a construction method thereof. The orthotropic steel plate-ultrahigh-performance concrete composite deck structure comprises a steel bridge deck plate and an ultrahigh-performance concrete layer laid above the steel bridge deck plate; and the steel bridge deck plate and the ultrahigh-performance concrete layer are stably bonded together through an adhesive layer. By adopting the orthotropic steel plate-ultrahigh-performance concrete composite bridge deck structure and the construction method thereof, the problems that a steel bridge deck system is fatigued and then damaged, and a flexible laid layer is prone to being damaged are effectively solved, damage to base materialsof the steel bridge deck system is zero, moreover, the overall bridge deck structure is simple, construction is convenient, and additionally, the advantages that the ultrahigh-performance concrete layer can be cast in situ and prefabricated, and the thickness can further be decreased are further achieved.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to an orthotropic steel plate-ultra high performance concrete composite bridge deck structure and a construction method. Background technique [0002] Orthotropic bridge decks are widely used at home and abroad, but the fatigue problem is prominent. In order to solve the problems of fatigue damage of steel bridge deck system and the vulnerability of bridge deck pavement, domestic and foreign researchers have done a lot of research, such as literature (Study on the basic performance of orthotropic steel plate-thin RPC composite bridge deck, Journal of China Highway Society , Shao Xudong, Cao Junhui, Yi Dutao, etc.) disclosed a steel-UHPC (Ultra High Performance Concrete) lightweight composite bridge deck structure, which can increase the local stiffness of the steel deck by more than 40 times and reduce the stress level of the steel deck by 30-80% , which can solve the pro...

AI Technical Summary

Problems solved by technology

However, a large number of dense studs are welded on the steel bridge deck of the composite bridge deck structure of the invention, which is easy to introduce new fatigue details. At the same time, the height of the stud shear key is large, which limits the thickness of the ultra-high performance concrete layer.

Another example is that the Chinese patent with the notification number CN106638306A discloses a steel-ultra-high-performance concrete composite bridge deck structure with a short steel bar shear structure and its construction method. The method directly welds the short steel bar shear structure on the steel bridge deck , can solve the disadvantages of the limited thickness of ultra-high performance concrete slabs, but welding will still cause damage to the base metal of the steel bridge deck, generate local peak stress, and introduce new fatigue details, and the UHPC layer can only be cast on site and cannot be prefabricated in the factory. UHPC has a large self-shrinkage and needs steam curing, so it is difficult to guarantee the quality of on-site construction

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