A steel-uhpc thin plate composite structure system with steel plate support-oblique nail cluster interface connection

Abstract

The invention discloses a steel plate bracket-skew nail cluster type interface connection steel-UHPC sheet combined structural system. An ultrathin bridge deck slab is mainly made of UHPC and connected with a steel beam in the position of an interface through cluster skew nails containing steel plate brackets, and a novel efficient combined structural system is formed. The UHPC is adopted as the material of the bridge deck slab, the dead weight of the structure can be reduced, and the spanning capacity of the structure is enhanced. By the adoption of connecting pieces, the comprehensive advantages of rigid connection of the steel plate brackets and flexible connection of studs can be brought into play. In the normal use stage, the interface slippage amount is reduced through rigid connection of the steel plate brackets, and in the ultimate state, the characteristic of the studs as the flexible connecting pieces is adopted for overcoming the defect of the insufficient ductility of the steel plate brackets as the rigid connecting pieces. The shear-resisting performance of the steel-UHPC interface can be enhanced through the laterally-arranged studs. Meanwhile, in UHPC boards, the short skew nails are arranged in a staggered mode and can serve as stiffening trusses of the UHPC boards, the rigidity of the UHPC boards is improved, and the overall rigidity of a combined section is enhanced.

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 steel-UHPC thin plate combined structure system of a steel plate bracket-slanted nail cluster type interface connection. 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 scho...

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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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