Cable-stayed bridge with highway and railway arranged asymmetrically on same layer

Abstract

The invention relates to a cable-stayed bridge with a highway and a railway arranged asymmetrically on same layer. The asymmetrically-arranged cable-stayed bridge comprises one or more bridge towers arranged in the longitudinal bridge direction, a main beam, transverse stabilizing cables and a plurality of stay cables used for connecting the bridge towers and the main beam. The main beam comprises a first steel box beam used for arranging a railway and a second steel box beam used for arranging a road, the dead load on the first steel box beam is larger than that on the second steel box beam, the first steel box beam and the second steel box beam are located on the two opposite sides of the bridge tower respectively, and the length of the first steel box beam in the transverse bridge direction is smaller than that of the second steel box beam in the transverse bridge direction. The distance between the first steel box girder and the bridge tower is a first preset distance, the distance between the second steel box girder and the bridge tower is a second preset distance, and the dead load action line of the main girder coincides with the axis of the bridge tower in the transverse bridge direction by adjusting the first preset distance and the second preset distance; therefore, the unbalance loading effect caused by transverse dead load asymmetric arrangement is eliminated, the structure is simple, stress is definite, and economical efficiency is good.

Description

technical field [0001] The invention relates to the field of bridge structures, in particular to a cable-stayed bridge with asymmetric arrangement of highway and railway on the same floor. Background technique [0002] At present, due to the heavy load of trains, high requirements for operating safety and stability, and strict control of vertical stiffness and beam end angle, long-span road-rail bridges often use cable-stayed bridges with relatively high stiffness, and road-rail combined construction leveling The common form of cable-stayed bridge layout is that the railway is arranged in the middle of the box girder, and the road is symmetrically arranged on both sides of the railway. This form is conducive to the structural force and reduces the cost of the main bridge. However, it is unavoidable that the road connection and the railway cross, the space utilization rate will decrease, and the cost of the approach bridge will increase, which may lead to an increase in the c...

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Problems solved by technology

[0004] The embodiment of the present invention provides a cable-stayed bridge with an asymmetric arrangement of highway and railway on the same floor, so as to solve the problems in the related art that the main girder and main tower of the cable-stayed bridge will deform in the direction of the bridge, the structure is complicated, and the economic efficiency is reduced.

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