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Title |
Damage Location Detection of Shear Building Structures Using Mode Shape
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Keywords |
손상검출 ; 모드형상 ; 모드해석 ; 고유진동수 ; 전단형 건물 ; 진동대 실험 Damage detection ; Mode shape ; Modal analysis ; Natural frequency ; Shear building ; Shaking table test |
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Abstract |
Damage location and extent could be detected by the inverse analysis on dynamic response of the damaged structure. In general, detection of damage location is possible by the observation of the mode shape difference between undamaged and damaged structure and assessment of stiffness reduction is possible by the observation of the natural frequency difference of them. The study on damage detection by the dynamic response in civil structures is reported enough and in practical use, but in building structures it is reported seldom due to several problems. The purpose of this study is to present the damage detection method on shear building structures by mode shape. The damage location index using 1st mode shape is observed theoretically to find out damage location. The damage detection method is applied to numerical analysis model such as MATLAB and MIDAS GENw for the verification. Finally the shaking table test on 3 story shear building is performed for the examination of the damage detection method. In shaking table results, as the story stiffness decrease by 25% the 1st mode frequency increase by 12%, and the damage location index represents minus at damaged story.
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