Steel-concrete composite beam structure with composite bonding anchorage shear-resistant joint and production method

Abstract

The invention relates to an interface pre-compression steel-concrete composite beam structure with a composite bonding anchorage shear-resistant joint and a production method thereof. The mode that anepoxy mortar layer and a shear resistance bolt are compositely connected is adopted, pre-tightening force is applied through the shear resistance bolt, thus the bonding interface of a concrete slab and a steel beam are in a pre-compaction state, and the concrete bridge deck slab and the steel beam are connected; meanwhile, friction shear resistance of the epoxy mortar shear-resistant connecting layer and the bonding interface can improve the stress state of bolt local stress concentration; and after the pre-tightening force is applied by the shear resistance bolt, the bonding surfaces of theepoxy mortar layer and the steel beam as well as the epoxy mortar layer and the prefabricated bridge deck slab are in a pre-compression state, in the bridge operating process, part of shear force between the concrete slab and the steel beam can be transmitted through the epoxy mortar layer, fatigue stress of the shear resistance bolt is reduced, the stress concentration phenomenon of the joint ofthe concrete slab and the bolt is avoided, and the fatigue life of the beam and bridge composite structure is prolonged.

Description

technical field [0001] The invention relates to the field of civil engineering, more specifically, to a steel-concrete composite beam structure with interface preloaded composite bonded anchorage shear connection, and a steel-concrete composite beam structure with interface preloaded composite bonded anchorage shear connection Method of production of composite beam structures. Background technique [0002] In recent years, steel-concrete composite girder bridges have been more widely used in my country. This type of bridge can give full play to the performance of steel and concrete, has good seismic performance, and can reduce its own weight, increase the clearance under the bridge, and effectively Shorten the construction period. But the composite girder bridge of prior art still exists some deficiencies: [0003] At present, the stud shear connectors commonly used in composite beam bridge structures have local stress concentration phenomenon under load, and the studs are ...

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Problems solved by technology

[0003] At present, the stud shear connectors commonly used in composite beam bridge structures have local stress concentration phenomenon under load, and the studs are prone to fatigue fracture under the action of vehicle load; the concrete bridge deck is prone to fatigue failure under the action of vehicle fatigue load. The service life of the bridge deck components is lower than the design service life of the whole bridge structure, and the composite structure bridge needs to replace the concrete deck during operation, which increases the life cycle cost of the bridge

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