{"id":44732,"date":"2026-03-24T16:50:18","date_gmt":"2026-03-24T15:50:18","guid":{"rendered":"https:\/\/www.eucentre.it\/?p=44732"},"modified":"2026-03-30T09:14:19","modified_gmt":"2026-03-30T08:14:19","slug":"seismic-qualification-non-structural-elements-fem-modelling","status":"publish","type":"post","link":"https:\/\/www.eucentre.it\/en\/seismic-qualification-non-structural-elements-fem-modelling\/","title":{"rendered":"Seismic Qualification of Non-Structural Elements (NSE): Numerical Modelling for Critical Infrastructure"},"content":{"rendered":"
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The seismic qualification of non-structural elements (NSEs) \u2013 with particular reference to electrical equipment (UPS, transformers, disconnectors, distribution boards, etc.) and electromechanical equipment (air handling units) \u2013 represents a technical field of primary importance for the protection and operational continuity of critical infrastructure in seismic zones.
\nAs part of the applied research and technical consultancy activities carried out on behalf of clients, the Eucentre Foundation conducts advanced numerical modelling and analysis (FEM) campaigns to support and complement dynamic tests on a shaking table, in accordance with the applicable regulatory standards.<\/p>\n

Context and significance<\/strong><\/h2>\n

In hospitals, data centres and telecommunications infrastructure, the functionality of UPS systems and electrical switchboards is essential for service continuity, even in the event of seismic events.
\nThe seismic qualification of these components is therefore a significant technical step within the verification and certification processes required by the relevant markets.<\/p>\n

Numerical modelling activities<\/strong><\/h2>\n

The methodological approach adopted integrates advanced FEM modelling, linear and non-linear dynamic analyses, and seismic inputs compliant with the main international regulatory standards (ICC-ES AC156, IEC, IEEE).
\nModelling activities may include:<\/p>\n

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  • pre-test predictive analyses to support the planning of the experimental campaign;<\/span><\/li>\n
  • comparison and interpretation of numerical and experimental results;<\/span><\/li>\n
  • assessments aimed at extending qualification to similar configurations (qualification by similarity), where applicable;<\/span><\/li>\n
  • analyses replacing experimental testing in cases provided for by regulations and in compliance with the required validation conditions.<\/span><\/li>\n<\/ul>\n

    Integrated approach<\/strong><\/h2>\n

    The combination of numerical modelling and shake table testing constitutes a well-established approach in the seismic qualification of equipment.
    \nThe Eucentre Foundation works in coordination with the client, from the definition of test configurations through to support for verifying compliance with relevant international standards (IEEE 693, IEC 62271, ICC-ES, ASME QME-1, IEEE 344), in accordance with the agreed technical and contractual requirements.<\/p>\n<\/div><\/div>

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    Case Studies: Excellence in Seismic Assessment<\/strong><\/h2>\n

    1. <\/strong>Riello UPS: Interconnected modular systems<\/strong><\/h3>\n<\/div><\/div>
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    For Riello UPS, we carried out numerical modelling of the load-bearing structure of a modular UPS system, consisting of electrically and mechanically interconnected units, in accordance with the design configurations provided.<\/span><\/p>\n<\/div>\n

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    The FEM model considered various internal constraint conditions to represent scenarios consistent with the design assumptions. The seismic input was defined in accordance with ICC-ES AC156.<\/span><\/p>\n<\/div>\n

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    The numerical analyses supported the experimental qualification process, providing a technical framework for the verifications required by the applicable standards.<\/span><\/p>\n<\/div>\n<\/div><\/div>

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    2. <\/strong>Mitsubishi: Fan Wall units for data centres<\/strong><\/h3>\n<\/div><\/div>
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    For Mitsubishi Electric Hydronics & IT Cooling Systems S.p.A., Eucentre assessed the seismic behaviour of the FAN WALL unit for data centres in single and double-stacked configurations. The units feature an external aluminium frame, internal reinforcements and complex internal components, including large fans, coils, condensate collection pans, etc.<\/span><\/p>\n<\/div>\n

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    FEM modelling (linear and non-linear analyses, ICC-ES AC156 input) enabled the identification of specific improvements and technical recommendations that guided the client towards targeted modifications before the shake table tests, reducing the risk of experimental failure and optimising the costs of the qualification campaign.<\/span><\/p>\n


    \n<\/span>For information on seismic qualification and numerical modelling services for NSE, please contact the research teams at the Eucentre Foundation.<\/p>\n<\/div>\n<\/div><\/div>

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