A steel-uhpc thin plate composite structure system for rapid assembly of steel plate brackets and clustered inclined nails

Abstract

The invention discloses a steel plate bracket-cluster type inclined nail fast assembled steel-UHPC thin plate combined structural system. The system comprises a steel beam, a UHPC thin plate, steel plate brackets and short nails; each steel plate bracket is of an isosceles trapezoid structure; connecting holes are formed in the steel plate brackets; high-strength friction type bolts penetrate through the connecting holes to be connected with the steel beam; the short nails are perpendicularly disposed on the inclined surfaces of the two sides, the front end surfaces and the rear end surfaces of the steel plate brackets, the UHPC thin plate is disposed above the steel beam; and combined bodies of the steel plate brackets and the short nails are uniformly distributed in the UHPC thin plate.UHPC is adopted and manufactured into ultra-thin bridge deck slabs, the self weight of the structure can be reduced, and the structure spanning capability is enhanced. Connection with the steel beam at an interface is achieved through the cluster type inclined nails of the plate brackets containing steel plates so as to form the combined structural system, the interface sliding amount is reduced by means of rigid connection of the steel plate brackets in a normal using stage, and in the ultimate limit state, the bolt-nail flexible connection part characteristic is adopted, and the defect thatthe ductility is insufficient if the steel plate brackets serve as rigid connection parts is overcome. Besides, the anti-shear property of the steel-UHPC interface can be enhanced by means of the bolts and nails which are laterally arranged.

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 steel-UHPC thin-plate composite structure system for rapid assembly of steel plate supports-clustered inclined nails. 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 and foreign schola...

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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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