Method to estimate equivalent natural period with micro-tremor measurements

Munemasa Tokunaga; Masamichi Sogabe; Fumiaki Uehan; Hiroyuki Tanimura; Yoshitaka Murono; Kiyoshi Ono

doi:10.2219/rtriqr.53.21

Method to estimate equivalent natural period with micro-tremor measurements

Munemasa Tokunaga^*, Masamichi Sogabe, Fumiaki Uehan, Hiroyuki Tanimura, Yoshitaka Murono, Kiyoshi Ono

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The object of this paper is to propose a method to estimate the equivalent natural period with micro-tremor measurements on the basis of the correlation between the natural frequency and the yield frequency. A method, combining the Eigensystem Realization Algorithm and some empirical hypotheses of vibration modes, was proposed for identifying the first natural vibration modes of structures. A ratio of the yield frequency to the natural frequency was mostly a certain constant value and the average value of the ratio depends on the type of structures. This paper proposes a simple procedure for estimating the yield frequency with micro-tremor measurements.

Original language	English
Pages (from-to)	21-27
Number of pages	7
Journal	Quarterly Report of RTRI (Railway Technical Research Institute) (Japan)
Volume	53
Issue number	1
DOIs	https://doi.org/10.2219/rtriqr.53.21
Publication status	Published - 2012 Feb
Externally published	Yes

Keywords

Eigensystem Realization Algorithm
Equivalent natural period
Micro-tremor measurement
Modal identification
Natural period
Nonlinear analysis

ASJC Scopus subject areas

Mechanical Engineering

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10.2219/rtriqr.53.21

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title = "Method to estimate equivalent natural period with micro-tremor measurements",

abstract = "The object of this paper is to propose a method to estimate the equivalent natural period with micro-tremor measurements on the basis of the correlation between the natural frequency and the yield frequency. A method, combining the Eigensystem Realization Algorithm and some empirical hypotheses of vibration modes, was proposed for identifying the first natural vibration modes of structures. A ratio of the yield frequency to the natural frequency was mostly a certain constant value and the average value of the ratio depends on the type of structures. This paper proposes a simple procedure for estimating the yield frequency with micro-tremor measurements.",

keywords = "Eigensystem Realization Algorithm, Equivalent natural period, Micro-tremor measurement, Modal identification, Natural period, Nonlinear analysis",

author = "Munemasa Tokunaga and Masamichi Sogabe and Fumiaki Uehan and Hiroyuki Tanimura and Yoshitaka Murono and Kiyoshi Ono",

year = "2012",

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T1 - Method to estimate equivalent natural period with micro-tremor measurements

AU - Tokunaga, Munemasa

AU - Sogabe, Masamichi

AU - Uehan, Fumiaki

AU - Tanimura, Hiroyuki

AU - Murono, Yoshitaka

AU - Ono, Kiyoshi

PY - 2012/2

Y1 - 2012/2

N2 - The object of this paper is to propose a method to estimate the equivalent natural period with micro-tremor measurements on the basis of the correlation between the natural frequency and the yield frequency. A method, combining the Eigensystem Realization Algorithm and some empirical hypotheses of vibration modes, was proposed for identifying the first natural vibration modes of structures. A ratio of the yield frequency to the natural frequency was mostly a certain constant value and the average value of the ratio depends on the type of structures. This paper proposes a simple procedure for estimating the yield frequency with micro-tremor measurements.

AB - The object of this paper is to propose a method to estimate the equivalent natural period with micro-tremor measurements on the basis of the correlation between the natural frequency and the yield frequency. A method, combining the Eigensystem Realization Algorithm and some empirical hypotheses of vibration modes, was proposed for identifying the first natural vibration modes of structures. A ratio of the yield frequency to the natural frequency was mostly a certain constant value and the average value of the ratio depends on the type of structures. This paper proposes a simple procedure for estimating the yield frequency with micro-tremor measurements.

KW - Eigensystem Realization Algorithm

KW - Equivalent natural period

KW - Micro-tremor measurement

KW - Modal identification

KW - Natural period

KW - Nonlinear analysis

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Method to estimate equivalent natural period with micro-tremor measurements

Abstract

Keywords

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