Ambient Vibration Measurements in an Irregular Building

Gicev, Vlado and Trifunac, Mihailo and Todorovska, Marija and Kocaleva, Mirjana and Stojanova, Aleksandra and Kokalanov, Vasko (2020) Ambient Vibration Measurements in an Irregular Building. Soil Dynamics and Earthquake Engineering. (In Press)

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Abstract

We show how complex, three-dimensional modes of vibration of an irregular building can be identified
by ambient vibration measurements. We present two-dimensional cross-sections of the three-dimensional
mode shapes and describe a measuring strategy for identifying the building properties when the excitation consists of nonstationary microtremors and short and weak wind bursts. We employ cross-correlations of
measured accelerations to identify predominance of excitation by microtremors (causing wave propagation
from ground up into the building), or by weak bursts of wind (wave propagation within the building and
down towards the foundation). We describe two lowest frequencies of vibration at 10.5 Hz and at 11.9 Hz
and their mode shapes.

Item Type: Article
Impact Factor Value: 2.637
Subjects: Engineering and Technology > Civil engineering
Natural sciences > Computer and information sciences
Engineering and Technology > Other engineering and technologies
Divisions: Faculty of Computer Science
Depositing User: Mirjana Kocaleva
Date Deposited: 09 Nov 2020 09:35
Last Modified: 09 Nov 2020 09:35
URI: https://eprints.ugd.edu.mk/id/eprint/24086

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