Magnetic levitation UHPC box girder

Abstract

The invention discloses a magnetic levitation UHPC box girder. The box girder comprises a box girder top plate, a box girder bottom plate and a box girder web arranged between the box girder top plateand the box girder bottom plate; box girder transverse ribs are arranged between the box girder webs in the transverse direction at intervals, the top of each box girder transverse rib is fixedly connected with the box girder top plate, the two transverse ends of each box girder transverse rib are fixedly connected with the inner sides of the box girder webs respectively, and the box girder transverse ribs are located in a pressed area of the box girder top plate to prevent warping instability of a thin plate; the box girder top plate, the box girder bottom plate and the box girder web are all made of UHPC materials so that the beam height and thicknesses of the box girder top plate, the box girder bottom plate and the web are reduced. The box girder is suitable for maglev transportation,the top plate, the bottom plate and the web of the box girder are made of UHPC materials, meanwhile, thicknesses of the top plate, the bottom plate and the web of the box girder are reduced, rigidityis improved, the strict deformation requirement of high-speed maglev for a bridge structure is met, meanwhile, the section square amount is reduced, construction is convenient, and the use amount ofa lower structure is reduced; the transverse ribs and the transverse partition plates are made of common concrete, so the structure cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of maglev rail transit, and more specifically relates to a maglev UHPC box girder. Background technique [0002] Maglev transportation is a kind of ground passenger transportation. The significant difference from the traditional wheel-rail transportation system is that the car body is suspended above the track by means of suspension force, and its walking part does not contact the track. The propulsion generated by the linear induction motor moves forward on the track. The charged levitation electromagnet on the levitation frame of the high-speed maglev train and the long stator coil on the track attract each other to provide the levitation force for the train to lift the train upward, and ensure a stable levitation gap by controlling the levitation excitation current. The suspension gap between the electromagnet and the track is generally controlled at about 10mm. [0003] The charged guiding electromagne...

AI Technical Summary

Problems solved by technology

When the span increases, conventional concrete structures cannot meet the stringent deformation requirements of high-speed maglev bridge structures due to their own characteristics such as shrinkage and creep, while the cost of steel structures is high, and the natural frequency is difficult to meet the requirements. At the same time, it may be necessary Additional damper

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