Seismic Fragility of Freestanding Buildings Contents Modelled as Rigid Blocks

Sarno, Luigi Di; Petrone, Crescenzo; Magliulo, Gennaro; Cosenza, Edoardo

doi:10.7712/120117.5617.17865

Cited by 1 publication

(1 citation statement)

References 14 publications

(19 reference statements)

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“…piping, relies on different damage parameters and thus alternative probabilistic estimators should be adopted. For instance, the IDA method was applied to nonstructural components for near-and far-field conditions (rigid blocks) that were included in healthcare facilities by considering different IMs in Di Sarno et al (2017). The research clearly showed that the PGA was the most efficient IM for short rigid blocks, whereas PGV was the most appropriate for taller ones.…”

Section: Fragility Assessment In Previous Studiesmentioning

confidence: 99%

On the seismic fragility of pipe rack—piping systems considering soil–structure interaction

Sarno

Karagiannakis

2020

Bull Earthquake Eng

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Piping systems constitute the most vulnerable component in down-and mid-stream facilities posing immediate threat to human lives, communities financial robustness and environment. Pipe racks present several mechanical and geometrical idiosyncrasies compared to common buildings and the seismic response is governed by the pipework layout. Important design requirements e.g. dynamic interaction between pipelines and supporting structure are commonly overlooked during pipe racks design process and uncertainties relevant to modelling of soil or seismic input are not quantified. In the present work, after reviewing the technical literature and codes, a 3D RC rack was used as a testbed and analysed as coupled and decoupled with a non-seismic code conforming piping system accounting for soil-structure interaction. Incremental dynamic analysis was adopted as an assessment methodology for deriving fragility curves considering ground motions in near-and far-field conditions. It was deduced that the modelling (boundary conditions of pipes) was the most considerable uncertainty since it increased the probability of collapse limit state of structural members from 0 to 59%. It was also demonstrated that soil deformability as well as source conditions altered considerably the dispersion of intensity measure conditional on engineering demand parameter of structural and nonstructural members. The results may be another indication that code provisions should be more normative regarding industrial pipe racks.

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Section: Fragility Assessment In Previous Studiesmentioning

confidence: 99%