Processing Data from Vibration Recordings

3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium

土木建筑工程;文学

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

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

011464, Romania^1

TechnicalUniversity of Civil Engineering Bucharest, National Institute for Research and Development URBAN-INCERC, Sos. Pantelimon, No. 266, Lacul Tei Avenue No. 122124, 020396., Bucharest

021652, Romania^2

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

021652, Romania^3

关键词: Acceleration amplitude;    Ambient vibrations;    Real-time transmissions;    Spectral content;    Strong earthquakes;    Structural behaviour;    Structural modelling;    Structural response;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/5/052089/pdf
DOI  :  10.1088/1757-899X/471/5/052089

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The article aims to present a way of processing the data within a real-time transmission system of recorded vibration. At present, Romanian National Strong Motion Network for Constructions of URBAN-INCERC has 56 seismic / digital accelerometer stations, of which 46 are in territory and 10 in Bucharest. The seismic stations of this system are placed in some ground floor-buildings type, assimilated with the free-field, or in buildings with 1-3 levels. First application of the real-time transmission system is related to the accelerometric records from moderate earthquakes, which have shown a spatial distribution of PGA with NE-SW directivity, similar to that observed under certain conditions of seismic severity in previous strong earthquakes. Some charts illustrating the acceleration amplitudes recorded from the 2016 and 2017 earthquakes in the URBAN-INCERC network will be shown. The second application is referred to the structural response (structural behaviour under ambient vibrations or moderate and severe seismic motions). Generally, the spectral analysis of these records leads to getting: the natural frequencies, the influence of the general directivity of waves propagation specific to the Vrancea source (on the spectral content and on structural response), the influence of the local soil conditions etc. In this case, for a study building, the vibration modes, the drift/the relative floor displacement etc. can result from this processing, with a validation based on a structural modelling with finite elements. The seismic wave propagation direction is the first option for determining the direction of propagation of severe effects on buildings. The correlation between them can be validated by the existence of pre-event dynamic characteristics of those buildings (before a major seismic event) and at post-event time.