Bridge detection and evaluation method and equipment based on impact vibration

Abstract

The invention discloses a bridge detection and evaluation method and bridge detection and evaluation equipment based on impact vibration. The bridge detection and evaluation method comprises a step of bridge back analysis based on reference-point-free block impact and a step of bridge forward analysis based on stepwise impact loading. The step of bridge back analysis based on reference-point-free block impact is used for examining small and medium-sized bridges which are seriously deficient in bearing capacity in a road network quickly. The step of bridge forward analysis based on stepwise impact loading is used for evaluating actual bearing capacity of bridges which have good safety condition and pass through the back analysis examination. The bridge detection and evaluation equipment integrates the testing and analysis functions, mainly comprises a vehicle-mounted hydraulic impact device, a mobile hydraulic impact device, a signal transmission and acquisition system, a data analysis system and the like. The bridge detection and evaluation equipment is applied to the back analysis and forward analysis of the bridges. The bridge detection and evaluation method and the bridge detection and evaluation equipment realize low-cost and efficient detection and evaluation of all the small and medium-sized bridges in the road network.

Description

Technical field [0001] The invention relates to the field of bridge detection and evaluation, in particular to a method and equipment for bridge detection and evaluation based on impact vibration. Background technique [0002] In the past century, many countries have made brilliant achievements in the field of bridge construction. But at the same time, bridge damage and even collapse accidents occur frequently all over the world. These accidents have caused huge losses to people's lives and property, and have caused extremely bad social effects. Therefore, it is particularly important to conduct timely inspection and evaluation of bridges. At present, there are two main problems in the detection and evaluation of in-use bridges. [0003] On the one hand, small and medium-sized bridges occupies a high proportion of the highway network. Due to capital and location constraints, it is difficult for these bridges to use traditional methods to achieve their timely detection and evaluat...

AI Technical Summary

Problems solved by technology

However, this monitoring method usually requires a large number of sensors to be placed on the bridge, and a relatively expensive monitoring system is used, and the monitoring cost is high.

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