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Methods Study of Damage Identification and Condition Evaluation on Long Span Cable-stayed Bridge Structure

Author: LiuRui
Tutor: ZuoHongWei；XiangZhongFu
School: Chongqing Jiaotong University
Course: Bridge and Tunnel Engineering
Keywords: Cable-stayed bridge Health Monitoring Damage Identification Monitoring program Condition Assessment
CLC: U441.4
Type: Master's thesis
Year: 2010
Downloads: 93
Quote: 2
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Abstract


As China's economic development and scientific and technological advances , transportation facilities in the emergence of many large , innovative bridge structures , bridge number is increasing. Bridge structural safety related to people 's life and property security, social stability and sustainable economic development . Therefore, the bridge health monitoring is particularly important, and quickly and efficiently identify the bridge structure may occur and damage the site of injury , the bridge operator to grasp the state of health is the top priority of the current bridge health monitoring . This bridge health monitoring in the existing theories and methods based on the combination of the Yangtze River Bridge in Chongqing Fengjie practical engineering , the first large-scale application of the finite element software to establish stayed fine spatial finite element model and the analysis and processing of large span cable-stayed bridge cable force of the force analysis and optimization and to determine a reasonable state into the bridge , and in accordance with the measured data to the model was modified ; Secondly, based on modal curvature and flexibility matrix concept , using a two injury indicators, stayed bridge girder structure has been set in damage recognition research , studies show that the damage index can clearly identify the location and extent of structural damage, but also has good noise immunity ; final comprehensive variety of effective monitoring methods , the development of a healthy monitoring program , and based on AHP theory, combined with the measured data, the state assessment technology research , but also on the actual bridge condition assessment carried out . The research work Fengjie Yangtze River Bridge Health Monitoring System establishment offers an economical and practical and effective implementation of the program for the bridge health monitoring system development application provides an example .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Bridge strength and fatigue damage
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