Joint connecting structure of profile steel-UHPC composite board

Abstract

The invention discloses a joint connecting structure of a profile steel-UHPC composite board. The profile steel-UHPC combined board comprises a plurality of profile steels and UHPC plates fixedly connected to the profile steels. The joint connecting structure comprises profile steel-UHPC combined plates which are adjacently arranged in the longitudinal direction of a bridge and transverse joint structures arranged between the profile steel-UHPC combined plates which are adjacently arranged in the longitudinal direction of the bridge. The transverse joint structures comprise transverse cast-in-place UHPC connecting parts located between the adjacent UHPC plates and fixing connecting pieces used for connecting the adjacent profile steel. The joint connecting structure can greatly reduce theself-weight and the manufacturing cost of a bridge deck slab, and has the advantages of being high in rigidity, durable and the like. The profile steel-UHPC composite board and common pavement are expected to become a special pavement scheme for completely replacing a traditional orthotropic steel bridge deck and steel bridge deck in the future and serve as a second bridge deck scheme to be provided for a large-span bridge.

Description

technical field [0001] The invention belongs to the field of bridges, in particular to a seam connection structure of composite bridge decks. Background technique [0002] Long-span bridges are a symbol of the country's technological level. Steel structure bridges have light weight, large spanning capacity, and good seismic performance, making them the first choice for long-span bridges. The deck structure of steel bridges usually adopts orthotropic steel deck system, but because the steel deck is a fully welded structure, not only the cost is high, but also the steel deck system suffers from two major diseases under the action of heavy-duty vehicles: ( 1) Fatigue cracking and local buckling of the steel bridge deck endanger the safety of the bridge; (2) frequent damage to the asphalt pavement and huge renovation costs. The above-mentioned diseases reduce the operating efficiency of bridges and are recognized as a worldwide problem in the field of steel bridges. my country...

AI Technical Summary

Problems solved by technology

However, practice has shown that UHPC low-rib bridge decks are 30% heavier than traditional steel decks, and are still difficult to apply to long-span bridges

In the patents CN109338866A and CN109610310A, Professor Shao Xudong proposed a new type of steel-UHPC low-rib plate, but the bridge deck is used in long-span bridges, generally there are more transverse joints and less longitudinal joints, and in order to ensure For the safety of the joints, the height of the transverse joints is set higher, which is the sum of the height of the UHPC top plate and the lower section steel, so the pouring volume is relatively large, resulting in an increase in the average plate thickness, which is not good for long-span flexible bridges that are extremely sensitive to self-weight

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