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Title |
Evaluation Using Dynamic Characteristic of Steel Structures under Periodical Impact Loads
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Authors |
김강석 ; 나환선 ; 이현주 ; 이강민 ; 유경석 |
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Keywords |
강 구조물 ; 시스템식별기법 ; 변전소 ; 주파수영역분해법 Steel structure ; System identification ; Power substation ; Frequency domain decomposition |
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Abstract |
Recently, safety diagnosis of the existing structures has been emerged as important issue. In particular, systematical and precise safety diagnostics for steel structures for power substation, have been required. Steel structures for power substation are under the periodical impact loads from operations of gas insulated switchgear. These loading condition accelerates damage and aging of structure. The objective of this research is to evaluate damage of structure under periodical impact loads. To evaluate the integrity of structures as organizing mathematical models including the dynamic characteristics of structures, Frequency Domain Decomposition method was choiced and an algorism was proposed. For verifying this methods and algorism, a mathematical model is composed of the development of a variety of reverse analysis and a signal processing technology reflecting physical damage of structures. A series of analysis and test results indicatge that proposed method has a confidence for applying a filed test. Therefore, it is expected to be able to take advantage of system identification to detect damage for the maintenance and management of steel structures under periodical impact loads such as power substation.
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