Bondbeam cable-stayed bridge sensor layout method based on two-phase multi-scale model correction

Abstract

The invention discloses a bondbeam cable-stayed bridge sensor layout method based on two-phase multi-scale model correction. By establishing a fine finite element model of a full bridge structure, the part easy to damage of the whole structure is determined, then the multi-scale finite element model with the part easy to damage being small-scale and other parts being large-scale is established, then the power characteristic of a real bridge is obtained through an environmental vibration test; the bondbeam cable-stayed bridge multi-scale finite element model is corrected by adopting a two-phase correspondence face method, a finite element model further approaching the structure of the real bridge is obtained, then the part easy to damage of the whole structure as well as monitoring content and monitoring position on structure overall correspondence analysis level are determined, and finally the layout sorts and layout positions of the sensors on the bondbeam cable-stayed bridge are determined. The bondbeam cable-stayed bridge sensor layout method ensures that a bondbeam cable-stayed bridge health monitoring sensor system is more reasonable, reliable and effective, and further faciliates the accuracy of the safety early warning and safety prevention of bridge health monitoring.

Description

technical field [0001] The invention belongs to the field of bridge structure analysis and bridge structure detection system design in the field of civil engineering, and in particular relates to a health monitoring sensor layout method for a long-span composite beam cable-stayed bridge structure. Background technique [0002] The bridge structural health monitoring system is a comprehensive monitoring system integrating structural monitoring, system identification and structural evaluation. The system first uses various advanced testing instruments and equipment to monitor various responses under various external stimuli; The various information of the bridge is processed, combined with the bridge structure finite element model and other priors to diagnose the structure, analyze the damage status of the structure; finally evaluate the health status of the bridge, and determine the scientific bridge repair and maintenance strategy. At present, the layout of bridge monitoring...

AI Technical Summary

Problems solved by technology

In the overall analysis of the bridge structure, the rough finite element model is generally used for analysis, regardless of the accuracy of the model, it is impossible to make an accurate analysis of the stress state of the whole bridge structure

The overall structure analysis can meet the requirements of sensor layout for structural integrity condition monitoring, but it is difficult to meet the requirements of sensor layout for vulnerable parts monitoring and the requirements of safety assessment for complex structures

[0005] At present, bridge health monitoring systems at home and abroad are rarely used on composite girder cable-stayed bridges

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