Measuring responses at all degrees of freedom (DOF) of a real structure is impossible and impractical when few sensors are available. This study presents a damage-assessment technique for seismically excited buildings using only a few floor-response measurements. In the first step, the system realization using information matrix (SRIM) identification technique was applied to estimate such modal properties as frequencies and damping ratios of an instrumented building. However, the complete mode shapes cannot be acquired due to a lack of comprehensive measurements. A novel optimal mode-shape-recovery (OMSR) technique was applied to reconstruct the complete first mode shape of the building system. An optimization process was then applied to minimize a prescribed objective function that represents the difference between measured and estimated outputs at instrumented locations. A story damage index (SDI) computed using the first mode shape recovered was applied to determine the degree of story damage. Noisy floor measurements of a five-story shear building under earthquake excitation were utilized for numerical verification. Moreover, a three-story benchmark building was analyzed to assess the accuracy and applicability of the proposed OMSR technique via experimental data. The proposed method obtained results in fairly good agreement with those of full measurements and is of value in practical application. The damage-assessment results obtained with the proposed method agree well with the actual damage, demonstrating that the proposed method is suitable for practical applications.
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December 2014
Research-Article
Damage Assessment of Seismically Excited Buildings Through Incomplete Measurements
Chi-Chang Lin,
Chi-Chang Lin
1
Distinguished Professor
Department of Civil Engineering,
Taichung 40227,
e-mail: cclin3@dragon.nchu.edu.tw
Department of Civil Engineering,
National Chung Hsing University
,250 Kuo-Kuang Road
,Taichung 40227,
Taiwan
e-mail: cclin3@dragon.nchu.edu.tw
1Corresponding author.
Search for other works by this author on:
Ging-Long Lin,
Ging-Long Lin
Department of Civil Engineering,
Taichung 40227,
National Chung Hsing University
,250 Kuo-Kuang Road
,Taichung 40227,
Taiwan
Search for other works by this author on:
Kun-Shu Hsieh
Kun-Shu Hsieh
Department of Civil Engineering,
Taichung 40227,
National Chung Hsing University
,250 Kuo-Kuang Road
,Taichung 40227,
Taiwan
Search for other works by this author on:
Chi-Chang Lin
Distinguished Professor
Department of Civil Engineering,
Taichung 40227,
e-mail: cclin3@dragon.nchu.edu.tw
Department of Civil Engineering,
National Chung Hsing University
,250 Kuo-Kuang Road
,Taichung 40227,
Taiwan
e-mail: cclin3@dragon.nchu.edu.tw
Ging-Long Lin
Department of Civil Engineering,
Taichung 40227,
National Chung Hsing University
,250 Kuo-Kuang Road
,Taichung 40227,
Taiwan
Kun-Shu Hsieh
Department of Civil Engineering,
Taichung 40227,
National Chung Hsing University
,250 Kuo-Kuang Road
,Taichung 40227,
Taiwan
1Corresponding author.
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received March 19, 2012; final manuscript received March 30, 2014; published online September 4, 2014. Assoc. Editor: Chong-Shien Tsai.
J. Pressure Vessel Technol. Dec 2014, 136(6): 061801 (9 pages)
Published Online: September 4, 2014
Article history
Received:
March 19, 2012
Revision Received:
March 30, 2014
Citation
Lin, C., Lin, G., and Hsieh, K. (September 4, 2014). "Damage Assessment of Seismically Excited Buildings Through Incomplete Measurements." ASME. J. Pressure Vessel Technol. December 2014; 136(6): 061801. https://doi.org/10.1115/1.4027326
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