1989
DOI: 10.2208/jscej.1989.410_243
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Identification of Structural Parameters and Input Ground Motion From Response Time Histories

Abstract: We report a procedure by which structural parameters and input ground motion are identified from measured responses only. We have assumed that the coda of the response time history represents the free vibration response of the structural system. Because the coda is not effected by the input ground motion, we can first identify such structural parameters as the masses, damping coefficients and spring constants from this part of the record. Input ground motion then is estimated from the full record and the ident… Show more

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Cited by 44 publications
(22 citation statements)
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“…The maximum error in the identification using EKF-based procedure is 11.8%, but it is only 4.4% using UKF-based procedure. The acceptable error in the identification process was reported to be about 10% 22,25,26 . From the results, it can be noticed the magnitude of error using EKF is larger and varied significantly from members to members; indicating the method failed to identify the defect-free state of the frame accurately.…”
Section: Health Assessment Of Defect-free Framementioning
confidence: 99%
“…The maximum error in the identification using EKF-based procedure is 11.8%, but it is only 4.4% using UKF-based procedure. The acceptable error in the identification process was reported to be about 10% 22,25,26 . From the results, it can be noticed the magnitude of error using EKF is larger and varied significantly from members to members; indicating the method failed to identify the defect-free state of the frame accurately.…”
Section: Health Assessment Of Defect-free Framementioning
confidence: 99%
“…The mass and stiffness matrix of th i element in the local coordinate system are assumed to be known as i M and i K in [7].Transforming them into the global coordinate system, it can be given by…”
Section: B the Physical Parameters Identification Of Bridge Structurementioning
confidence: 99%
“…To address the issue of noise in the responses, numerically generated white noise with intensity of 5% of the root mean square values of the responses observed at all dynamic degree of freedoms are added to the theoretical responses. The same procedure was followed by Toki et al (1989), Koh et al (1991) and Wang and Haldar (1994). With the noise-included response data, the frame is again identified and the results are shown in Table 1.…”
Section: Form Matrix a By Equationmentioning
confidence: 99%
“…As expected, for the noise-contaminated outputs, the maximum error increased to 2.461%. However, it is considerably smaller than other available methods reported in the literature (Toki et al, 1989;Koh et al, 1991). Defects in the frame are then introduced.…”
Section: Form Matrix a By Equationmentioning
confidence: 99%