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Radar Interferometer Application for Remote Deflection Measurements of a Slender Masonry Chimney

  • Georgios LivitsanosEmail author
  • Antonella Saisi
  • Dimitrios G. Aggelis
  • Carmelo Gentile
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 962)

Abstract

Seismic vulnerability of many cultural heritage masonry structures has been vital the recent years especially in seismic prone countries such as Italy. Due to the frequency of the seismic motions in time and due to many limitations, concerning the available knowledge and the seismic design of these stiff masonry structures, there is the necessity of non-contact and quick ambient response recordings so as to provide a structural integrity assessment. In order to improve the knowledge about the dynamic behavior of the slender masonry structures two main different analyses are necessary. The first goal is a territorial level assessment for the determination of the seismic ground motion. The second one concerns the knowledge of the dynamic characteristic of the existing structures. Recently, radar technique has been advanced by the development of microwave interferometers which serve non-contact vibration monitoring of large structures. The main characteristic of these radar systems, is the possibility of simultaneously measuring the dynamic deflection of many points on large structures. As a result, ambient vibration measurements can provide the identification of the modal properties of a structure. This paper reports a set of on-site applications of radar interferometer technique, aiming at evaluating the capability of measuring the vibration response of a slender masonry chimney in the Leonardo campus of the Politecnico di Milano. The results of the investigation highlight the accuracy and the simplicity of the technique for fast dynamic response measurements as well as the capability to detect temperature effects on the fundamental frequencies on the structure.

Keywords

Ambient vibration testing Radar interferometer Modal parameters Masonry chimney Territorial level analysis 

Notes

Acknowledgements

The Research Fund - Flanders (FWO) is acknowledged for funding the two months research stay in Politecnico di Milano in the Department of Architecture, Built environment and Construction engineering (DABC), (V419718 N), and the first author G.L. acknowledges FWO, for funding the four years project “AE-FracMasS: advanced Acoustic Emission analysis for Fracture mode identification in Masonry Structures” (G.0C38.15).

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Georgios Livitsanos
    • 1
    Email author
  • Antonella Saisi
    • 2
  • Dimitrios G. Aggelis
    • 1
  • Carmelo Gentile
    • 2
  1. 1.Department of Mechanics of Materials and Constructions (MEMC)Vrije Universiteit BrusselBrusselsBelgium
  2. 2.Department of Architecture, Built Environment and Construction Engineering (DABC)Politecnico di MilanoMilanItaly

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