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Proceedings Paper

Damage detection tests of five-story steel frame with simulated damages
Author(s): Koichi Morita; Masaomi Teshigawara; Hiroshi Isoda; Takuji Hamamoto; Akira Mita
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Paper Abstract

This paper presents damage detection tests of five-story steel frame with simulated damages. We discuss pre-analytical study and results of experiments. Fiber brag grating (FBG) sensors, accelerometers, strain gauges and laser displacement meters are installed in this test frame. We assume damages by removing studs from only one story, loosening bolts of beams, cutting part of beams and extracting braces from only one story. From the results of pre-analytical study, we can estimate which story is damaged from the change of natural period and mode shape to some extent. We applied flexibility method which is one of a damage identification methods using modal properties. We also apply flexibility method to results of experiments. In some cases we can estimate which story is damaged, and in other cases we cannot. We also applied a method using multiple natural frequency shifts. Making use of the change in five natural frequencies due to damage, the location of damaged stories can be pinpointed. In both methods, we cannot identify damaged story in some cases. Some methods other than methods using modal properties have to be tried to apply in such cases.

Paper Details

Date Published: 24 July 2001
PDF: 9 pages
Proc. SPIE 4335, Advanced Nondestructive Evaluation for Structural and Biological Health Monitoring, (24 July 2001); doi: 10.1117/12.434163
Show Author Affiliations
Koichi Morita, Ministry of Land, Infrastructure and Transport (Japan)
Masaomi Teshigawara, Ministry of Land, Infrastructure and Transport (Japan)
Hiroshi Isoda, Ministry of Land, Infrastructure and Transport (Japan)
Takuji Hamamoto, Musashi Institute of Technology (Japan)
Akira Mita, Keio Univ. (Japan)


Published in SPIE Proceedings Vol. 4335:
Advanced Nondestructive Evaluation for Structural and Biological Health Monitoring
Tribikram Kundu, Editor(s)

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