Cable stayed bridge with semi-floating truss type bridge towers

Abstract

The invention discloses a cable stayed bridge with semi-floating truss type bridge towers. The cable stayed bridge with the semi-floating truss type bridge towers comprises side piers on the two sidesand the bridge towers located on the middle part, wherein supporting seats are arranged on the middle parts of the bridge towers and are arranged at the upper ends of the side piers separately, a main beam which bears bridge floor load is arranged on the supporting seats, a plurality of pairs of stay cables are arranged between the bridge towers and the main beam, and the bridge towers are separated from the main beam. According to the cable stayed bridge with the semi-floating truss type bridge towers, the space truss type bridge towers are adopted, the longitudinal dimensions of the bridgetowers are large, and the bearing platform thickness and the concrete quantity of lower foundations of a large-span bridge are effectively reduced; two rows of longitudinal supporting seats are arranged on each bridge tower, the temperature deformation of the main beam is reduced, the problem that creep deformation of the large-span concrete main beam is difficult to control is effectively solved,and it is beneficial to bridge floor driving, especially to the riding comfort and the comfort level of high speed railway driving; and no fixed supporting seat is arranged, for paving a continuouslywelded rail track large-span railroad bridge, the temperature span can be effectively reduced, track temperature regulators are prevented from being arranged, and the maintenance workloads are reduced.

Description

technical field [0001] The invention belongs to the field of bridge structure construction, in particular to a cable-stayed bridge with semi-floating truss type bridge towers. Background technique [0002] As the span of girder bridges increases, additional auxiliary measures such as stay cables are required to meet the structural stress requirements, but the temperature deformation of the main girder will also increase accordingly. If the prestressed concrete main girder is used, the creep deformation in the later stage is also difficult to control , affecting the smoothness and comfort of the bridge deck, especially for high-speed railway bridges with high requirements for smoothness. Contents of the invention [0003] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a cable-stayed bridge with semi-floating truss type bridge towers. [0004] The technical solution of the present invention is: a cable-stayed...

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Problems solved by technology

[0002] As the span of girder bridges increases, additional auxiliary measures such as stay cables are required to meet the structural stress requirements, but the temperature deformation of the main girder will also increase accordingly. If the prestressed concrete main girder is used, the creep deformation in the later stage is also difficult to control , affecting the smoothness and comfort of the bridge deck, especially for high-speed railway bridges with high requirements for smoothness

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