Use of Spectral Entropy for Damage Detection in Masonry Buildings in the Presence of Mild Seismicity

Proceedings

Miraglia, Gaetano¹  Lenticchia, Erica²  Ceravolo, Rosario³ 

[1] Author to whom correspondence should be addressed.;Department of Architecture and Design, Politecnico di Torino, 10125 Turin, Italy;Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, 10129 Turin, Italy

关键词: structural health monitoring;    spectral entropy;    damage detection;    masonry building;   

DOI  :  10.3390/ICEM18-05288

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The seismic events that struck central Italy in 2016 caused severe damage to a wide range of buildings and infrastructures. Masonry buildings were particularly affected, even for low values of peak ground acceleration. In this paper, the data recorded for three masonry buildings belonging to the Seismic Observatory of Structures (OSS) network are used to detect their seismic damage by means of Spectral Entropy (SE). However, entropy measures are sensitive to the energy inserted in the system, since an input of energy can lead to a more deterministic behavior of the structure and thus to a reduction of the entropy indicator. When non-stationary time series are used to evaluate the presence of damage (e.g. mild seismicity) the entropy of the system could be underestimated, leading to misleading results. For these reasons, in this paper an indicator based on SE is proposed to assess the occurrence of damage also in the presence of mild seismicity.

【 授权许可】

CC BY