A Calculation Method of Anti-overturning Bearing Capacity of Single Column Pier Girder Bridge

Abstract

The invention discloses a method for calculating the anti-overturning bearing capacity of a single-pier girder bridge. The method comprises the following steps that firstly, the rotating axis of a box girder in an overturning critical state is determined; secondly, the dead load moment of the box girder, the load moment of the anti-overturning side and the anti-torque support reaction moment of the overturning side are calculated according to the rotating axis; thirdly, the anti-overturning moment of the single-pier girder bridge is calculated according to the dead load moment of the box girder, the load moment of the anti-overturning side and the anti-torque support reaction moment of the overturning side. The method solves the problem that the anti-overturning bearing capacity of an existing single-pier girder bridge cannot be predicted, the anti-overturning load capacity of the girder bridge is determined in real time according to the real-time load condition of the girder bridge, and the overturning probability of the girder bridge can be decreased easily.

Description

technical field [0001] The invention relates to civil engineering technology, in particular to a method for calculating the anti-overturning bearing capacity of a single-column pier-beam bridge. Background technique [0002] The causes of bridge collapse accidents include insufficient construction quality, unreasonable design, vehicle overload, impact and other collapses caused by natural conditions. Especially in recent years, the successive collapse of single-pillar piers and girder bridges has aroused widespread concern in the society. [0003] At present, domestic bridge designers pay more attention to the flexural and shear bearing capacity of the superstructure and the crack resistance of concrete, and there is a large degree of redundancy when the requirements of the code are met. However, the necessary attention is not paid to the lateral stability and overturning of the bridge. Even if the overturning stability is considered, most of the end supports are empty or n...

AI Technical Summary

Problems solved by technology

Therefore, in the design of highway bridges, the calculation of the overturning stability of the superstructure only takes 30% of the overload into account and cannot adapt to the actual situation of the existing vehicle load; at the same time, it is debatable to judge whether the structural overturning only uses the negative reaction force of the support; finally, because Lack of effective and practical calculation methods, engineering personnel cannot scientifically and quickly judge whether the bridge is overturned

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