Dynamic behaviour of unstiffened stainless steel profiled barrier blast walls

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Performing optimum design, reliable assessment or suitable verification for stainless steel profiled barrier blast wall structures requires dealing with various challenges, stemming from the associated uncertainties in material properties, fabrication, installation, and more importantly variations in the blast load characteristics. In the analysis, assessment, and design of these blast walls, one of the key areas to be appreciated and understood is the dynamic response of these structures. This paper presents a methodology developed for identifying the predominant structural behaviour and characteristics of profiled barrier blast wall structures, using a probabilistic approach. Twenty parametric base models are developed using Ansys and by implementing a Latin Hypercube Sampling (LHS) approach, the section properties of the models are represented in terms of probability distributions. A number of models are generated stochastically and modal analyses performed to identify the dynamic sensitivity of these models. The corresponding response classification of these structures is evaluated from the load duration and natural periods of the structures. The results of the study confirm that structural response, for the wide range of profiled blast walls analysed, is mainly quasi-staticor static, as opposed to dynamic. In fact, dynamic effects are negligible for unstiffened profiled barrier blast walls and structural responses in most cases can be estimated on a static or quasi-static basis. This conclusion would help a competent design engineer to consider a proper dynamic load factor at an early stage of the design, without involving complex advanced nonlinear dynamic analyses.
Original languageEnglish
Pages (from-to)403-411
Number of pages9
JournalShips and Offshore Structures
Issue number4
Early online date16 Nov 2017
Publication statusPublished - 2018

Bibliographical note

This PhD research is funded by Advanced Structural Analysis and Management
Group (ASAMG) Ltd., Aberdeen.

Sriramula’s work within the Lloyd’s Register Foundation Centre for Safety and
Reliability Engineering at the University of Aberdeen is supported by Lloyd’s Register Foundation (LRF). LRF, a UK registered charity and sole shareholder of Lloyd’s Register Group Ltd, invests in science, engineering and technology for public benefit, worldwide.


  • Stainless steel blast walls
  • Unstiffened profiled barriers
  • Modal analysis
  • Probabilistic analysis
  • Ansys
  • Latin Hypercube Sampling


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