Calculation method of small and medium-span continuous bridge hogging moment impact coefficient

A technology of impact coefficient and small and medium spans, applied in calculation, electrical digital data processing, special data processing applications, etc., can solve the problem of providing reliable data statistics support for negative bending moment impact coefficients of fulcrum sections of continuous girder bridges, etc.
CN105404718AActive Publication Date: 2016-03-16CHANGAN UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGAN UNIV
Publication Date
2016-03-16

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Abstract

The invention discloses a calculation method of a small and medium-span continuous bridge hogging moment impact coefficient. A small and medium-span continuous bridge is taken as an object, the characteristics, including the structural style, the geometrical morphology, the supporting situation, the quality, the rigidity and the like, of the bridge as well as the influence factors of the impact coefficients, including the amount, the axle number, the axle weight, the axle interval, the driving speed and the like of a vehicle are comprehensively considered, a method of combining theoretical analysis with numerical simulation is adopted to solve a computational formula problem of the regression fitting of the continuous bridge hogging moment impact coefficient according to an interrelation between the impact coefficient and an internal force influence line, the vehicle-mounted dynamic behaviors and mechanisms of the continuous bridge are disclosed, a bridge design theory and a bridge calculation method can be enriched, references are provided for bridge dynamics assessment, and the calculation method is accelerated to be widely applied and developed.
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Description

technical field

[0001] The invention belongs to the technical field of traffic bridges, and in particular relates to a calculation method for the negative moment impact coefficient of a continuous girder bridge with a medium and small span. Background technique

[0002] The detection of bridge impact coefficient has extremely far-reaching significance for bridge design, maintenance and reinforcement. If the impact coefficient of bridge structure cannot be accurately detected, it will lead to unreasonable design of new bridges or untimely maintenance and reinforcement of old bridges, which will cause bridge damage caused by vehicle loads. In severe cases, major accidents will occur, causing loss of people's lives and property.

[0003] The bridge under the action of dynamic load produces dynamic effects in the horizontal, vertical and vertical directions of space, and the vertical dynamic effect is called the impact effect. Usually, the total vertical load effect of moving l...

Claims

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