External prestressing corrugated steel web T-shaped beam and construction method

Abstract

The invention discloses an external prestressing corrugated steel web T-shaped beam and a construction method. The T-shaped beam comprises a concrete top plate, a concrete bottom plate, end cross beams, a corrugated steel web, shear connectors and external prestressing cables. The concrete top plate and the concrete bottom plate are connected with the corrugated steel web through the shear connectors to form a T-shaped beam section. The end cross beams are arranged at the two ends of the T-shaped beam and connected with the concrete top plate, the concrete bottom plate and the corrugated steel web. The external prestressing cables are steered at the break angle through steering devices and anchored to the end cross beams. The external prestressing corrugated steel web T-shaped beam has the advantages of stress performance, the material utilization rate and durability of a common corrugated steel web T-shaped beam, structural stress is optimized, the member structure is simplified, the amount of adopted prestressed reinforcement is reduced, and manufacturing cost is reduced; the problems that during internal prestressing construction, stretch-draw porous channels are blocked, and grouting is not compact after stretching and drawing are carried out are solved, the construction quality is ensured, and the bridge structure can be maintained and reinforced easily during the later stage.

Description

technical field [0001] The invention belongs to the technical field of road and railway bridges, and mainly relates to an externally prestressed corrugated steel web T-beam and a construction method. Background technique [0002] The corrugated steel web prestressed concrete T-beam structure is a new type of steel-concrete composite structure. Through the combination of steel and concrete, the characteristics of high compressive strength of concrete and high shear strength of corrugated steel plates are fully utilized. It improves the use efficiency of the two materials, reduces the self-weight of the structure, reduces the construction procedures of making formwork for the web, binding steel bars, and pouring concrete, reduces the project cost, and avoids web cracks. It is an economical, reasonable, and practical structure. [0003] At this stage, there are prestressed concrete T-beams with corrugated steel web structure as the web. For example, the Chinese patent (ZL2014...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the invention is to address the deficiencies in the prestressed concrete T-beam in the body, and propose a kind of external prestressed corrugated steel web T-beam and construction method, on the basis of the common corrugated steel web structure, by setting the external prestressing force, so that It not only has the advantages of ordinary corrugated steel web T-beam structure in terms of mechanical performance, material utilization, construction safety, economic benefits, durability, etc., but also can effectively overcome the problems encountered by the above-mentioned precast concrete T-beam, and optimizes the structure. It simplifies the structure of components, reduces the amount of prestressed steel bars, and reduces the cost; avoids the problems of blockage of tensioning channels during internal prestressing construction and unrealistic grouting after tensioning, reduces construction difficulty, and ensures The construction quality speeds up the construction progress; and it is easy to repair and strengthen the bridge structure in the later stage

Images