Layout and bearing structure of curved girder bridges resistant to creeping and overturning

Abstract

The invention discloses a mode for distributing a curved girder bridge support with climb overturning resistance. According to the mode, a curved bridge is restored after transverse climbing through transverse self-resetting supports, a box girder is controlled to make transverse large rotation by pulling and pressing the support, sorted control of box girder overturned deformation can be realized; one intermediate support is used as a fixed support, and other intermediate supports are transverse self-resetting supports, so that the box girder is prevented from performing overlarge horizontalrigid body translation. According to the mode, four kinds of supports are respectively fixed supports, longitudinal translation pulling and pressing supports, transverse self-resetting supports and climbable pulling and pressing supports, and the radius of the sphere of the self-resetting supports can be determined through transverse climbing allowable size, climbing height and support bearing force requirement. The mode can be used for assisting climbing resistance of a curved girder bridge, sorted control of box girder overturned deformation can be realized, and a scientific and economic solution is provided to improving the climbing resistance and overturning bearing force of the curved girder bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to an arrangement method and a support structure of a curved girder bridge resistant to creeping and overturning. Background technique [0002] With the rapid development of high-grade highways and urban roads in our country, more and more viaducts and urban interchanges are being built; due to the constraints of terrain and buildings, elevated structures and interchange structures present characteristics such as bends, slopes, obliques, and special shapes; Compared with straight-line girder bridges, curved girder bridges are more adaptable to the terrain and can better meet the needs of complex alignments. Therefore, in high-grade highways and urban roads, curved girder bridges can realize various traffic connections and adapt to complex road conditions, and are an important bridge type in modern traffic engineering. [0003] In recent years, many bridge cli...

AI Technical Summary

Problems solved by technology

The existing bearing arrangement only satisfies the small deformation in the vertical and horizontal directions of the bridge, and cannot solve the problem of bridge creeping over time, nor can it solve the problem of horizontal and horizontal deformation of the bridge caused by the centrifugal force of vehicles; therefore, as the service life of the bridge increases , the curved bridge will slowly creep laterally, and if the creep reaches the limit of bridge overturning, bridge accidents may occur

In the existing support arrangement, when the lateral rigid body of the curved bridge rotates, the support tends to be voided; if the lateral rigid body rotates too much and the support is completely voided, the support no longer provides bearing capacity, and the bridge overturns The possibility of damage is greatly increased

[0006] In addition, the bearings commonly used in existing domestic highway bridges include plate rubber bearings, pot rubber bearings and spherical bearings. These bearings have the characteristics of flexible rotation in all directions, but they do not resist overturning and self-resetting Ability

At present, some people in China have designed tie-rod spherical bearings with pulling capacity, and research on various energy-dissipating and self-resetting bearings has also made good progress, but the structural form is still relatively complicated.

Images