Steel plate holder and skew spike combined interface connection steel and UHPC (ultrahigh performance concrete) thin slab combination structure system

Abstract

The invention discloses a steel plate holder and skew spike combined interface connection steel and UHPC (ultrahigh performance concrete) thin slab combination structure system. According to the system, the ultra-thin deck slab is made from UHPC so that dead weight of the structure can be reduced while the bridge capacity of the structure can be improved; steel plate holder and skew spike combinedconnectors are used for interface connection at the interface, so that comprehensive advantages of the steel plates serving as the rigid connectors and the spikes serving as the flexible connectors can be achieved well, interface slippage can be reduced under action of rigid connection of the steel plate holders in the normal application state, and the defect in ductility of the steel plate holders which serve as the rigid connectors can be overcome according to characteristic of the spikes serving as the flexible connector in an ultimate state. The short skew spikes are in staggered arrangement to form the reinforcing truss web member of the UHPC slab, so that rigidity of the UHPC slab is increased and further the integral rigidity of the combined section is increased.

Description

technical field [0001] The invention belongs to the field of combined structures in the field of civil engineering, and in particular relates to a combined bridge structure system composed of steel girders and ultra-thin UHPC bridge decks and related interface connection technology. Background technique [0002] The traditional steel-concrete composite structure mainly uses steel beams and ordinary concrete bridge decks to form a combined section through shear connectors such as studs to jointly bear the force. Compared with the steel bridge structure system, the composite structure bridge can reduce the structural cost, and compared with the concrete bridge, the composite structure bridge can effectively reduce the structural weight. Therefore, this structural system gives full play to the advantages of steel structure and concrete structure in terms of construction performance and mechanical performance, and at the same time has good economy. However, studies by domestic ...

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Problems solved by technology

Although these measures can reduce the self-weight of the structure to a certain extent, but at the same time make the construction process complicated and difficult to implement

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