Complete set of controllable shearing-resistant and pulling-resistant connecting piece for detachable steel-concrete composite beam bridge and construction method of complete set of controllable shearing-resistant and pulling-resistant connecting piece

Abstract

The invention discloses a detachable steel-concrete composite beam bridge complete set controllable shear-resistant and pulling-resistant connecting piece and a construction method thereof.The connecting piece comprises a plurality of bolts connected to a steel beam and a plurality of embedded parts embedded in a prefabricated concrete bridge deck slab, and each embedded part comprises an upper steel plate, a lower steel plate and a plurality of steel pipes connected between the upper steel plate and the lower steel plate; the cross section of the steel pipe is in a straight-edge oval shape, and the steel base plate is installed and the nut is screwed after the bolt penetrates through the embedded part. Full prefabrication of the concrete bridge deck slab in the hogging moment area of the fabricated steel-concrete combined continuous beam bridge can be achieved, the tensile stress of the concrete bridge deck slab in the hogging moment area can be effectively controlled, the overall stress performance of a connecting area is improved, and the long-term performance and durability of the concrete bridge deck slab are improved; and meanwhile, the anti-pulling capability is realized to resist the lifting of the concrete slab and the separation from the surface of the steel beam.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a complete set of controllable shear-resistant and pull-resistant connectors for a detachable steel-concrete composite girder bridge and a construction method thereof. Background technique [0002] The connector is the key for the concrete bridge deck and the steel beam to form a combined action to work together. The connector mainly bears the longitudinal shear force between the interface between the steel beam and the concrete slab, restricting the free sliding between the two interfaces, so as to ensure that the steel beam and the concrete slab can interact with each other. The cooperative deformation between the concrete slabs ensures that the steel beams and the concrete slabs work together to improve the stiffness and bearing capacity of the section; the connectors can also resist the vertical separation and lifting of the concrete slabs caused by the overall ...

AI Technical Summary

Problems solved by technology

For the connection area between the cast-in-place concrete bridge deck and the precast concrete bridge deck with reserved keyways or holes, there are on-site wet operations. It affects the overall mechanical performance of the connection area of ​​the precast concrete bridge deck, and most of the existing anti-pull and non-shear connections adopt the method of wrapping elastic materials outside the connection, which inevitably bears the longitudinal shear force in the negative moment area and cannot Precise Control and Calculations

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