Steel-super high performance concrete composite beam based on ribbed plate type bridge deck and construction method

Abstract

The invention discloses a steel-super high performance concrete composite beam based on a ribbed plate type bridge deck and a construction method. The construction method includes the following steps that step1, steel beams are machined, manufactured and installed; step2, shearing force connecting parts are welded; step3, the super high performance concrete bridge deck is constructed; step4, a guardrail or an anti-collision wall is constructed; step5, bridge deck pavement is constructed, wherein the super high performance concrete bridge deck and the steel beams are fixed through the shearing force connecting parts, the cross section or / and the longitudinal section of the super high performance concrete bridge deck is / are of a ribbed plate structure, and pre-stressed reinforcements can be arranged on a longitudinal rib region or / and a transverse rib region. The composite beam is reasonable in stress, high in strength and capable of substantially reducing the structure dead weight, effectively avoiding defects at a hogging moment region of a composite continuous beam and bringing tensile strength, compressive strength and high durability of super high performance concrete into full play; the composite beam has the advantages of being small in building height, high in rigidity, small in dead weight, good in durability, crack resistance and fatigue resistance and the like, and has great practical value and good economic benefits.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a steel-ultra-high-performance concrete composite beam based on a ribbed bridge deck and a construction method thereof. Background technique [0002] Composite beam structures are widely used in the fields of roads, bridges and construction due to their advantages of reasonable material utilization, economy, and convenient construction. However, the concrete in the negative bending zone of composite continuous beams is prone to cracking under tension, resulting in poor durability of composite beams. In order to solve this problem, two methods are currently used in the design: one method is to allow the concrete slab in the structure to crack, but limit the width of the crack, usually to increase the reinforcement ratio of the structure so that the concrete slab meets the requirements under normal use. The limit of the crack width, that is, the strong reinforcement meth...

AI Technical Summary

Problems solved by technology

When the strong reinforcement method is used alone, it is only suitable for the construction of small and medium-span bridges, because of its long-term work with cracks, it has an adverse effect on durability

The method of applying precompressive stress inevitably also imposes additional stress on the shear connectors, which not only increases the burden on the steel beam, but also weakens the effect of precompressive stress on the concrete slab; The additional stress on the shear connectors is reduced, but the bonding strength between the post-cast belt and the precast concrete connection interface is poor, and there are weak links or corrosion channels in the composite beam at the connection interface of different materials.

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