TY - GEN
T1 - Time-frequency signal analysis for nondestructive evaluation of pile with cap
AU - Lo, Kuo Feng
AU - Ni, Sheng Huoo
AU - Charng, Jenq Jy
AU - Huang, Yan Hong
PY - 2008
Y1 - 2008
N2 - As stress waves decay as they pass through the pile foundation system, it is extremely challenging for all nondestructive testing methods to evaluate the pile integrity of a shaft underneath a structure. In this study, time-frequency signal analysis (TFSA) is used for signal processing and adopted to interpret the pile integrity testing signal. An experimental case with pile lengths of 58m with caps, were tested by the low strain sonic echo method. Traditional time domain analyses can not identify the pile tip response signals 58m lengths. After time-history curves are transformed into a time-frequency domain distribution, the results indicate the pile tip can be located more easily and clearly than the traditional time-domain analyses of pile integrity testing allowed for.
AB - As stress waves decay as they pass through the pile foundation system, it is extremely challenging for all nondestructive testing methods to evaluate the pile integrity of a shaft underneath a structure. In this study, time-frequency signal analysis (TFSA) is used for signal processing and adopted to interpret the pile integrity testing signal. An experimental case with pile lengths of 58m with caps, were tested by the low strain sonic echo method. Traditional time domain analyses can not identify the pile tip response signals 58m lengths. After time-history curves are transformed into a time-frequency domain distribution, the results indicate the pile tip can be located more easily and clearly than the traditional time-domain analyses of pile integrity testing allowed for.
UR - http://www.scopus.com/inward/record.url?scp=56349101043&partnerID=8YFLogxK
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U2 - 10.4028/www.scientific.net/amr.47-50.9
DO - 10.4028/www.scientific.net/amr.47-50.9
M3 - Conference contribution
AN - SCOPUS:56349101043
SN - 0878493786
SN - 9780878493784
T3 - Advanced Materials Research
SP - 9
EP - 12
BT - Multi-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
PB - Trans Tech Publications
T2 - Multi-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
Y2 - 28 July 2008 through 31 July 2008
ER -