Box girder bridge anti-overturning monitoring system based on structural response measurement

Abstract

The invention discloses a box girder bridge anti-overturning monitoring system based on structural response measurement. The box girder bridge anti-overturning monitoring system comprises a plurality of pairs of vertical displacement sensors, the vertical displacement sensors are installed at the two ends of the pier top support in pairs and are used for continuously obtaining vertical displacement of the measuring point under the action of the external load; the vertical displacement is converted into a support rotation angle at a corresponding position, whether the support is disengaged or not is judged according to the support rotating angle, further whether the bridge structure has the possibility of overturning risk or not is judged, on-site arrangement of an information acquisition and network communication system are monitored, and an information processing and analysis master control system is deployed at the cloud end. The method has the advantages of being simple in calculation, low in system cost, convenient to construct and the like, and is suitable for anti-overturning monitoring of various box girder bridges.

Description

technical field [0001] The invention relates to the field of bridge health monitoring, in particular to an anti-overturning monitoring system for box girder bridges based on structural response measurement applicable to various box girder bridges. Background technique [0002] Box girder bridges, especially curved box girder bridges with single-column piers, are widely used in urban viaducts, interchanges and ramp bridges. However, this type of box bridge is mostly an integral hoisting structure with a high center of gravity; the pier top of a single-column pier bridge is narrow, which limits the distance between supports, and sometimes only a single support can be used. Therefore, this type of box bridge has the problem of insufficient anti-overturning ability. On the other hand, the problem of vehicle overloading is becoming more and more serious and common. The probability of overturning moment caused by unilateral loading of heavy vehicles or overloaded vehicles is very...

AI Technical Summary

Problems solved by technology

However, for bridges that have been built, due to the randomness of vehicle loads, it is difficult to fully consider overloading, abnormal traffic flow, etc. during the design process; moreover, the resistance of the structure itself is also uncertain

Therefore, although the anti-overturning stability coefficient is used in the design to specify the anti-overturning ability of the bridge, it cannot completely ensure the structural safety in actual use.

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