Probabilistic structural performance of RC frames with corroded smooth bars subjected to near- and far-field ground motions

Di Sarno, Luigi ORCID: 0000-0001-6244-3251 and Pugliese, Francesco ORCID: 0000-0003-1829-3473 (2022) Probabilistic structural performance of RC frames with corroded smooth bars subjected to near- and far-field ground motions. Journal of Building Engineering, 49. p. 104008.

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Abstract

This paper investigates the seismic vulnerability of existing RC frames exposed to corrosion and subjected to near-field and far-field ground motions. A threefold approach for corrosion is adopted to illustrate the probabilistic framework and define time-dependent performance criteria for an accurate seismic fragility assessment. A bond-slip model is employed to simulate the fixed-end rotation and column-beam joints behaviour to account for the deficit in the bond strength of plain rebars. Such a model is calibrated using experimental studies from the literature and considering the effects of corrosion. An inelastic buckling model of steel bars is also incorporated in the finite element model through a hysteretic material to investigate its impact on the deformation capacity of RC members. The effects of near-field and far-field earthquakes are investigated through incremental dynamic analyses (IDA) and cloud analyses on a typical four-storey RC frame with plain bars. Results from the fragility analysis indicate that corrosion has significant effects on the seismic performance of such RC frames over time and near-field pulse-like motions are more destructive than both near-field no-pulse-like and far-field earthquakes.

Item Type:	Article
Uncontrolled Keywords:	Corrosion, Earthquake engineering, Structural analysis, Probabilistic assessment, Finite element modelling
Divisions:	Faculty of Science and Engineering > School of Engineering
Depositing User:	Symplectic Admin
Date Deposited:	14 Jan 2022 14:37
Last Modified:	18 Jan 2023 21:16
DOI:	10.1016/j.jobe.2022.104008
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3146761