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Establishment of Diagnostic Methods for Infrastructure

基础设施诊断方法的建立

基本信息

批准号：
10450175
负责人：
OHTSU Masayasu
金额：
$ 8.13万
依托单位：
Kumamoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

Concerning the diagnostic methods for infrastructure, nondestructive inspections and evaluation systems are surveyed worldwide in this research. Related with the interested fields of investigators, these are categorized into six research fields. The one is the application of acoustic emission (AE) to diagnosis of concrete structures. AE moment tensor analysis is developed and applied to concrete structures to identify cracking mechanisms. The second is nondestructive testings of concrete. Ultrasonics, half-cell potential measurement, radar inspection, and thermography are investigated and developed for in situ observation. The third is nondestructive evaluation and fracture mechanisms of concrete members. In order to estimate the deterioration process of concrete structures, nondestructive evaluation is conducted on the basis of fracture mechanics. This leads to quantitative evaluation of the deterioration. The fourth is nondestructive testings and damage evaluation of steel structures. The main target for inspection is the defects in steel members. The fifth is prediction of the deterioration process of bridge structures, and the sixth is the expert systems for bridge maintenance. Thus, evaluation procedures are surveyed and new systems are developed.Since it is recently reported that many of civil structures are going to reach their service-life limit due to aging and disasters all over the world, the research conducted is in urgent demand. Accordingly, the updated summary of the methods is eventually proposed. The report is so comprehensive as to be applicable and able to contribute to a variety of diagnostic procedures for infrastructure.

在基础设施的诊断方法方面，本研究综述了世界范围内的无损检测和评估系统。根据研究者感兴趣的领域，将其分为六个研究领域。一是声发射技术在混凝土结构损伤诊断中的应用。声发射矩张量分析的发展和应用到混凝土结构，以识别开裂机制。二是混凝土的无损检测。超声波，半电池电位测量，雷达检查，和热成像的研究和发展，在现场观察。三是混凝土构件的无损检测与断裂机理。为了估计混凝土结构的劣化过程，基于断裂力学进行无损评价。这导致对劣化的定量评估。四是钢结构无损检测与损伤评估。检测的主要目标是钢构件的缺陷。五是桥梁结构的劣化过程预测，六是桥梁养护维修专家系统。近年来，由于世界各地的老化和灾害等原因，许多土木建筑物的使用寿命即将达到极限，因此迫切需要进行研究。因此，最终提出了更新的方法摘要。该报告是如此全面，适用，并能够促进各种诊断程序的基础设施。