Floor spectra estimates for an industrial special CBF structure

[+] Author and Article Information
Roberto Javier Merino Vela

IUSS Pavia, Institute for Advanced Studies, Via Ferrata 1, 27100 Pavia, Italy

Emanuele Brunesi

EUCENTRE, European Centre for Training and Research in Earthquake Engineering, Via Ferrata 1, 27100 Pavia, Italy

Roberto Nascimbene

EUCENTRE, European Centre for Training and Research in Earthquake Engineering, Via Ferrata 1, 27100 Pavia, Italy

1Corresponding author.

ASME doi:10.1115/1.4041285 History: Received January 19, 2018; Revised August 22, 2018


Non-structural components play an important role in the correct functioning of industrial facilities, which may suffer greatly from earthquake-induced actions, as demonstrated by past seismic events. Therefore, the correct evaluation of seismic demands acting upon them is of utmost importance when assessing or designing an industrial complex exposed to seismic hazard. Among others, nonlinear time history analyses of structural systems including non-structural elements and floor response spectra are well-known methods for computing these actions, the former being more accurate and the latter being less onerous. This work focuses on deriving floor spectra for a steel special concentrically braced frame (SCBF), which is a common type of lateral-load resisting system for industrial frames. The results are used to compute the seismic actions on a small liquid storage tank mounted on the case study frame. Additionally, the results are compared to those obtained by modeling the structure and the tank together. A simple model, consisting of two uncoupled single degree of freedom systems, is used to represent the tank. The floor spectra resulting from both models are compared to establish differences in the behavior of the structure and non-structural element/component. Finally, the seismic demand on the tank - obtained by direct and indirect analyses - is compared to that obtained by applying ASCE 7-10 and Eurocode 8 prescriptions.

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