Dynamic Characteristics of Buildings from Signal Processing of Ambient Vibration

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Dobre, Daniela^1,2 ; Sorin Dragomir, Claudiu^3

Technical University of Civil Engineering Bucharest, Lacul Tei Avenue, No. 122-124, Bucharest

020396, Romania^1

National Institute for Research and Development URBAN-INCERC, Sos. Pantelimon, No. 266, Bucharest

021652, Romania^2

University of Agronomic Sciences and Veterinary Medicine, Faculty of Land Reclamation and Environment Engineering, Marasti Avenue, No. 59, Bucharest

011464, Romania^3

关键词: Ambient vibrations;    Dynamic characteristics;    Experimental techniques;    Low-intensity;    Natural factors;    Natural vibration periods;    Seismic station;    Stationary randoms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/2/022087/pdf
DOI  :  10.1088/1757-899X/245/2/022087

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The experimental technique used to determine the dynamic characteristics of buildings is based on records of low intensity oscillations of the building produced by various natural factors, such as permanent agitation type microseismic motions, city traffic, wind etc. The possibility of recording these oscillations is provided by the latest seismic stations (Geosig and Kinemetrics digital accelerographs). The permanent microseismic agitation of the soil is a complex form of stationary random oscillations. The building filters the soil excitation, selects and increases the components of disruptive vibrations corresponding to its natural vibration periods. For some selected buildings, with different instrumentation schemes for the location of sensors (in free-field, at basement, ground floor, roof level), a correlation between the dynamic characteristics resulted from signal processing of ambient vibration and from a theoretical analysis will be presented. The interpretation of recording results could highlight the behavior of the whole structure. On the other hand, these results are compared with those from strong motions, or obtained from a complex dynamic analysis, and they are quite different, but they are explicable.