2012 Fiscal Year Final Research Report
A NEW DAMAGE DETECTION METHOD FOR BRIDGE CONDITION ASSESSMENT IN STRUCTURAL HEALTH MONITORING
| Project/Area Number |
23656290
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Yamaguchi University |
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Principal Investigator |
MIYAMOTO Ayaho 山口大学, 大学院・理工学研究科, 教授 (10093535)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 長寿命化 / モニタリング / 解析・評価 / ノンパラメトリック状態式 / 損傷検知 |
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| Research Abstract |
This study tried to challenge the establishment of a newly proposed “State Representation Methodology (SRM)” and its application to bridge condition assessment based on the bridge monitoring data. The SRM is a novel tool that can provide some ideas and algorithms for data mining in the bridge monitoring system. The state of a system such as bridge structure can be obtained by a state variable that calculate from a State Representation Equation (SRE). A Kernel function method which plays an important role in the Support Vector Machines (SVM) is applied to get solutions of the SRE. In the computation of the SRE, it needs to be changed into a Large-Scale Linear Constraint Problem (LSLCP). A new compatible algorithm is therefore proposed for solving technique of the LSLCP. Before using the SRM, it is necessary that the system features need to extract from the complex responses observed data in the system. Consequently, a new time-frequency analysis tool, called Frequency Slice Wavelet Transform (FSWT), will be able to powerfully reveal a change of the characteristics in vibration signal. The FSWT produces five new properties in contrast with the traditional wavelet transform. Therefore, the paper will show the new method that can be used widely in signal processing. In this paper, it will also be introduced a general theory for the non-parametric description of the infrastructure system’s state and will demonstrate how to apply the SRM to practical problems.
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Research Products
(13 results)
