The Studies On Monitoring And Analysis Cable Tension Damage Of Model Cable-Stayed Bridge

Dong Ying Yellow River Sheng Li Bridge completed in September 1987. from Dong Ying City, Shan Dong Province,15km, and from the mouth of the Yellow River about 40km. Since the date of completion has passed for 24 years, meanwhile after many tests, the test data by superpositioning found in 24 years of operation of cable force distribution cables has changed, in order to accurately understand after injury stay-cables superpositioning change and reasonable adjustment for cable-stayed bridge cable, Dong Ying Yellow River victory entrusted Da Lian university of technology management department on the Sheng Li bridge seismic research model test. The thesis Dong Ying Yellow River existing problem of Sheng Li bridge are as follows:(1) Overview and cable stayed bridges and other major structural elements and its role in the development status and force characteristics of the cable force changes caused by two factors are summarized:1, cable damage; 2, cable replacement project due to changes in cable tension.(2) Describes the basic theory of fiber grating. Analysis of the working mechanism of FBG sensors and to study in the experiment using a small clamp sensing mechanism of FBG sensors and calibrate them one by one.(3) Establish Cable-stayed Bridge Ansys finite element model for the study. To cable damage experiments were carried out 100% and 50% two cable force damage cases, and analyzes the response of cable tension force, combined with the theory of the injury to make the relevant summary.(4) On finite element model of cable-stayed bridge was established based on scale model cable-stayed bridge, carrying out the model for cable for cable damage and the corresponding finite element model in experimental research, access to cable damage changes in cable tension under the experimental features, combined with theoretical analysis results, identify the performance of the cable stayed bridge damage caused by the variation. Bridge health monitoring for the database to do a preliminary study, carried out damage location identification of the model cable test.(5) According to the cable damage on the full bridge change the characteristics of cable force, made plain in the bridge structure and routine testing program for the site and the cable tension is adjusted to provide a theoretical basis for claim;...