A steel plate support-diagonal nail combined quick-connect steel-uhpc combined structural system

Abstract

The invention discloses a steel plate holder and skew spike combined rapid connecting steel and UHPC (ultrahigh performance concrete) combination structure system, comprising a steel beam, an UHPC thin slab, steel plate holders and short spikes; the steel plate holders are of isosceles-trapezoid structure, and are connected with the steel beam through high-strength bolts; the short spikes are vertically arranged on bevels of two sides of each steel plate holder; the UHPC thin slab is cast on the upper side of the steel beam; combinations of the steel plate holders and the short spikes are uniformly distributed inside the UHPC thin slab. As the deck slab is made of UHPC, dead weight of the structure can be reduced while bridge capacity of the structure can be improved; steel plate holder and skew spike combined connectors 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 theflexible connectors can be achieved well, and interface slippage can be reduced under action of rigid connection of the steel plate holders in the normal application state; in the UHPC slab, the shortskew spikes are in staggered arrangement to form the reinforcing truss of the UHPC, and accordingly rigidity of the UHPC slab is increased and the integral rigidity of the combination section is increased.

Description

technical field [0001] The invention belongs to the field of composite structures in the field of civil engineering, and in particular relates to a composite bridge structure system formed by 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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