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Title: Verification of multi‐degree‐of‐freedom building modelling for seismic response prediction based on microtremor measurement
Authors: Ikeda, Yoshiki
Kurata, Masahiro
Xie, Jinzhe
Author's alias: 池田, 芳樹
倉田, 真宏
Keywords: damage estimation
M-DOF system
microtremor
modal system identification
participation vector for seismic input
seismic response prediction
Issue Date: Jun-2022
Publisher: Wiley
Journal title: Earthquake Engineering & Structural Dynamics
Volume: 51
Issue: 7
Start page: 1610
End page: 1635
Abstract: The applicability of the proposed dynamic response model for buildings is investigated using shaking-table tests with a four-storey steel specimen. This approach derives the equation of motion for a multi-degree-of-freedom linear building based on microtremor measurements. Under a linear assumption, the equation can estimate the seismic response accelerations, velocities, and displacements at microtremor sensor locations without the need for information about the mass, damping, stiffness matrices or need for structural design documents to estimate peak responses that are linked with seismic damages of structural and non-structural components. The modelling is unconstrained by structural shape, composition of frames, connections of structural members, or the assumption of a rigid floor. In comparison to the previous methods assuming simple/regular building shape with standard/typical rigid floor, the proposed model is applicable to large-scale low-rise buildings with irregular shapes, flat expanses, and open spaces such as large atria and skylights as well. The applicability study considers two practical scenarios: natural frequencies and damping ratios based on microtremors that can be updated by an earthquake and a standard assumption for structural design. The prediction accuracy is best when the participation vector for seismic input is obtained from sensors located on the upper floors; the structure mostly exhibits elastic response; a modal system identification is applied to the seismic measurement; and local damage does not affect the global seismic response of the structure. The reason is that this method assumes that identified mode shapes do not change due to the occurrence of an earthquake.
Rights: This is the peer reviewed version of the following article: ['Earthquake Engineering & Structural Dynamics', Volume51, Issue7, June 2022, Pages 1610-1635], which has been published in final form at https://doi.org/10.1002/eqe.3630. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
The full-text file will be made open to the public on 03 March 2023 in accordance with publisher's 'Terms and Conditions for Self-Archiving'
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/274170
DOI(Published Version): 10.1002/eqe.3630
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