Performance Evaluation System for Main Reinforced Concrete Girders of Existing Bridges

Author:

Kawamura Kei1,Frangopol Dan M.2,Miyamoto Ayaho3,Abe Masato1

Affiliation:

1. Bridge and Structure Laboratory, Department of Civil Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8656, Japan

2. Department of Civil, Environmental, and Architectural Engineering, University of Colorado, CB 428, Boulder, CO 80309-0428

3. Department of Computer and Systems Engineering, Yamaguchi University, Tokiwadai 2-16-1, Ube, Yamaguchi, 755-8611, Japan

Abstract

A novel performance evaluation system for main reinforced concrete girders of existing bridges evaluates durability and load-carrying capability by using technical specifications and results of simple visual inspections. Three features of the system are described. The first feature is the application of an expert system. Because the purpose of this study is to develop a novel system to evaluate the performance of a bridge element with limited information provided from simple visual inspections, it is necessary to embed into the system the knowledge of bridge experts. The second feature is a neuro-fuzzy hybrid inference. The system performs a fuzzy inference to simulate the inference mechanism used by experts for evaluating bridges. This process is integrated into a computer as a neural network; therefore, the system improves the knowledge base by using the back-propagation method. The third feature is the visualization of the inference process. The system must clearly explain how the outputs are calculated because the road networks, including bridges, represent important investments that must be carefully monitored. The learning capability of the system is demonstrated on an existing bridge in Japan. The effectiveness is verified by comparing the diagnostic results provided by a bridge expert and those proposed by the system.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Civil and Structural Engineering

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Bayesian regression modeling of concrete carbonation depth for inclusion in J-BMS;Advances in Bridge Maintenance, Safety Management, and Life-Cycle Performance, Set of Book & CD-ROM;2015-03-02

2. Using Soft Computing to Analyze Inspection Results for Bridge Evaluation and Management;Journal of Bridge Engineering;2010-07

3. LCC-based bridge maintenance strategy in Yamaguchi prefecture;IABSE Symposium, Weimar 2007: Improving Infrastructure Worldwide;2007

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