Steel wire rope reinforcing system and method for continuous beam hogging moment area bearing capacity

Abstract

The invention provides a steel wire rope reinforcing system and method for continuous beam hogging moment area bearing capacity. A plurality of steel wire rope reinforcing units are installed on the surface of a beam body top plate of a T-shaped continuous beam in parallel in the longitudinal direction of a bridge; each steel wire rope reinforcing unit comprises an anchoring end steel plate, an anchoring end anchorage device, an anchoring end anchor head, a tensioning end steel plate, a tensioning end anchorage device, a tensioning end anchor head and a plurality of steel wire ropes. After theother end of each steel wire rope penetrates through one notch of the tensioning end anchorage device, the end of each steel wire rope is fixed by the tensioning end anchor head; and a cast-in-placeconcrete layer and an asphalt concrete layer are sequentially paved above the steel wire rope reinforcing unit. The method has the advantages that the method is an effective mode for reinforcing the continuous beam with insufficient hogging moment prestress, the hogging moment prestress is reinforced through the steel wire ropes, and compared with a traditional reinforcing mode, the method has theadvantages of being convenient to construct, good in safety, good in economic benefit and the like.

Description

technical field [0001] The invention belongs to the technical field of negative moment zone reinforcement, and in particular relates to a steel wire rope reinforcement system and method for the bearing capacity of a continuous beam in the negative moment zone. Background technique [0002] Among the beam bridges with medium and small spans in China, the prestressed concrete prefabricated continuous beam is one of the most widely used structural forms in modern bridges. The load-bearing structure of continuous beams (T-beams, box-shaped beams) continuously spans several spans to form a statically indeterminate structure, which has the advantages of high structural rigidity, small deformation, less expansion joints, and smooth and comfortable driving. It is beneficial to meet the requirements of modern high-speed driving; compared with simply supported beams with the same span, continuous beams have smaller section size, light weight, and less positive bending moment prestress...

AI Technical Summary

Problems solved by technology

This reinforcement method has the following disadvantages: due to the construction of both the bridge deck pavement and the beam body below the bridge deck pavement, there are problems such as difficult construction, high construction cost and long construction period.

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