A detection device and detection method for a bridge state

Abstract

The invention relates to the technical field of bridge detection monitoring, in particular to a bridge state detection device and detection method. The bridge state detection device comprises an acquisition device, a communication unit and a monitoring unit and is used for receiving acquired data and forming a judging result according to the acquired data. Compared with the prior art, the bridge state detection device and detection method has the advantages that under an aftershock state after load passes through a bridge, the torsional vibration frequency of each plate beam is acquired according to the accelerated speed in the horizontal direction, the fact that the torsional vibration frequency of each plate beam is close to the torsional vibration frequency of each plate beam under an independent stressing state is judged through the monitoring unit, and the facts that a damage phenomenon occurs in a hinged gap and force transfer can not be achieved are judged according to the fact that the torsional vibration frequency of each plate beam is close to the torsional vibration frequency of each plate beam under the independent stressing state. By adopting the method, the traffic closing condition is not needed, the stress state of the hinged gap can be measured in real time, and then the transverse connection state of the plate beams can be obtained in real time.

Description

technical field [0001] The invention relates to the technical field of bridge detection and monitoring, in particular to a bridge state detection device and detection method. Background technique [0002] Due to the advantages of low building height, fast construction speed and low construction cost, slab bridges are widely used in the construction of small and medium-span road bridges and urban viaducts. Such as figure 1 , where x represents the horizontal direction, y represents the vertical direction, and O represents the axial direction. When the loaded vehicle passes through the slab bridge, the slab girder at the lower part of the loaded vehicle undergoes elastic deformation, and at the same time most of the load is transmitted to the adjacent slab by hinge Beams, in order to achieve the function of joint stress, if the hinged joints are damaged, the hinged joints will not be able to achieve stress transmission, and there will be a phenomenon of single-plate stress, a...

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Problems solved by technology

However, the relative vertical displacement of adjacent plate girders is greatly affected by the position and size of the load. Therefore, this method is difficult to accurately determine the lateral connection status of plate girders, and the error rate is high

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