A New Structural Damage Monitoring System for Simply Supported Beam Bridges

Abstract

The invention relates to a bridge structure real-time monitoring system, which aims at a simply supported beam bridge particularly, and relates to a structure damage monitoring system, a correspondingvibration sensor arrangement method and a structure damage assessment method. Three-dimensional vibration sensors are arranged at one-fourth spans, one-half spans, and three-quarter spans of each single-slab beam bottom of the simply supported beam bridge to collect and monitor vibration data when a single vehicle of a vehicle type crosses the bridge. Through performing big data clustering analysis on the vibration correlation among the measuring points, the lateral transmission situation of the vibration of the simply supported beam bridge can be monitored according to the separation condition of the clusters, so as to assess the damage condition of the bridge structure, issue an early warning in time, and avoid the condition of single beam stressing.

Description

technical field [0001] The invention relates to a bridge structure real-time monitoring system, in particular to a simply supported girder bridge, and relates to a structure damage monitoring system, a corresponding structure monitoring sensor arrangement method and a structure damage assessment method. Background technique [0002] Relevant data show that bridges with small and medium spans account for about 80% of the total number of existing bridges in my country, and simply supported beam bridges are an important part of small and medium span concrete bridges. With the prolongation of service period of simply supported girder bridges and the improvement of traffic load level, the carrying capacity of simply supported girder bridges built in the early days can no longer meet the needs of modern traffic. At present, quite a few simply supported girder bridges in service have suffered from different degrees and different forms of diseases, and the failure of transverse conn...

AI Technical Summary

Problems solved by technology

The typical characteristics of transverse connection failure are the spalling of concrete on the surface of the connecting steel plate and the cracking of the weld seam of the connecting steel plate, so that the stressed beam cannot effectively transfer the load to the non-stressed beam

The failure of the transverse connection of a simply supported girder bridge will reduce the integrity of the bridge structure and affect the lateral distribution of loads, resulting in increased deflection of the stressed beam and smaller deflection of the unstressed beam, making the distance between the stressed beam and the non-stressed beam less clear. Good cooperative work, the stressed beam is prone to damage

In severe cases, "single beam stress" will occur, which will bury a huge safety hazard for transportation

At present, there is no effective and systematic method for monitoring the failure of lateral connections of simply supported beam bridges.

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