Dynamic Identification Techniques for the Vulnerability Analysis of Glass Soft Targets: On-site Vibration Experiments and Numerical Simulations on a Glazed Footbridge

  • Chiara BedonEmail author
Conference paper
Part of the NATO Science for Peace and Security Series C: Environmental Security book series (NAPSC)


The use of glass in buildings as load-bearing material showed an exponential increase. Although it represents a relatively new solution for constructions, requiring appropriate design knowledge, glass is frequently used for facades, roofs, footbridges, etc. Deep care should be certainly spent at the design stage – to ensure reliable fail-safe requirements – but also during the life-time of glass structures. The brittle behaviour and limited tensile resistance of material, in addition to the high flexibility of glass assemblies, are responsible of major issues for structural engineers. Further criticalities are represented by time and ambient effects, or extreme loads. The vulnerability assessment of glass structures is hence an open topic, still requiring huge efforts. A combination of multiple aspects should be properly assessed to ensure appropriate protection and mitigation, especially for glazed soft targets. In this paper, dynamic identification methods are used for an in-service glass footbridge. On-site vibration experiments are discussed, including Finite Element numerical analyses, so as to explore the footbridge dynamic performance and assess its vulnerability.


Structural glass Vulnerability analysis Fail-safe design Soft target On-site vibration experiments Finite-element (FE) numerical simulations 



This research study is part of the ‘INVERSE’ project (‘Università degli Studi di Trieste – Finanziamento di Ateneo per progetti di ricerca scientifica – FRA2016’). Ing. E. Bergamo and Mr. R. De Marco are acknowledged for providing the experimental instruments and technical support during the on-site tests.

A special acknowledgement is for the So.Co.Ba Foundation ‘Società per la conservazione della Basilica’ (Mr. A. Bergamin), for facilitating the field experiments.


  1. 1.
    Haldimann M, Luible A, Overend M (2008) Structural use of glass. IABSE, Zurich., ISBN 978-3-85748-119-2Google Scholar
  2. 2.
    Patterson M (2011) Structural glass facades and enclosures. Wiley, Hoboken,. ISBN 978-0470502433Google Scholar
  3. 3.
    Institution of Structural Engineers (ICE) (2014) Structural use of glass in buildings, 2nd edn., ISBN 978-1874266518. IStructE Ltd, New DelhiGoogle Scholar
  4. 4.
    Zhang X, Bedon C (2017) Vulnerability and protection of glass windows under blast: experiments, methods and current trends. Int J Struct Glass Adv Mater Res 1(2):10–23. CrossRefGoogle Scholar
  5. 5.
    Bedon C, Zhang X, Santos F, Honfi D, Kozłowski M, Arrigoni M, Figuli L, Lange D (2018) Performance of structural glass facades under extreme loads – design methods, existing research, current issues and trends. Constr Build Mater 163:921–937CrossRefGoogle Scholar
  6. 6.
    Feldmann M, Kasper R, Abeln B, Cruz P, Belis J et al (2014) Guidance for European structural design of glass components-support to the implementation, harmonization and further development of the Eurocodes. In: Report EUR 26439, Joint Research Centre, Institute for the Protection and Security of the CitizenGoogle Scholar
  7. 7.
    CNR-DT 210/2013 2013 Istruzioni per la Progettazione, l’Esecuzione ed il Controllo di Costruzioni con Elementi Strutturali in Vetro. CNR, Roma (I),
  8. 8.
    Bedon C (2017) Structural glass systems under fire: overview of design issues, experimental research, and developments. Adv Civil Eng 2017:18. Article ID 2120570CrossRefGoogle Scholar
  9. 9.
    Bedon C, Santarsiero M (2018) Transparency in structural glass systems via mechanical, adhesive, and laminated connections – existing research and developments. Adv Eng Mater 20.
  10. 10.
    Larcher M, Arrigoni M, Bedon C, van Doormaal A, Haberacker C, Hüsken G, Millon O, Saarenheimo A, Solomos G, Thamie L, Valsamos G, Williams A, Stolz A (2016) Design of blast-loaded glazing windows and facades: a review of essential requirements towards standardization. Adv Civil Eng 2016.
  11. 11.
    Lori G, Morison C, Larcher M, Belis J (2018) Sustainable facade design for glazed buildings in a blast resilient urban environment. Glass Struct Eng.
  12. 12.
    Ivanov IV, Velchev DS, Georgiev NG, Ivanov ID, Sadowski T (2016) A plate finite element for modelling of triplex laminated glass and comparison with other computational models. Meccanica 51(2):341–358CrossRefGoogle Scholar
  13. 13.
    Vasileios K, Larcher M, Solomos G (2018) Review on soft target/public space protection guidance. Report EUR 29116 EN, 2nd edn. European Commission, Brussels., ISBN 978-92-79-79907-5, pp 1831–9424. CrossRefGoogle Scholar
  14. 14.
    Kalvach Z (2016) Basics of soft targets protection – guidelines, 2nd edn. Soft Targets Protection Institute, PragueGoogle Scholar
  15. 15.
    Bedon C, Bergamo E, Izzi M, Noè S (2018) Prototyping and validation of MEMS accelerometers for structural health monitoring – the case study of the Pietratagliata cable-stayed bridge. J Sens Actuator Netw 7(3):30CrossRefGoogle Scholar
  16. 16.
    ABAQUS: Dassault Systèmes, ABAQUS computer software v. 6.14, Providence, RI, USAGoogle Scholar
  17. 17.
    SMIT: Structural Modal Identification Toolsuite Homepage: Last accessed 21 Oct 2018
  18. 18.
    Papán D, Papánová Z (2018) Higher frequency dynamic response analysis of the foam concrete block element. In: MATEC Web of Conferences, vol. 196Google Scholar
  19. 19.
    Papán D, Papánová Z (2018) Numerical models for the elastic halfspace dynamic response due to road traffic load. In: MATEC Web of Conferences, vol. 196Google Scholar

Copyright information

© Springer Nature B.V. 2020

Authors and Affiliations

  1. 1.University of TriesteTriesteItaly

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