Consideration of the state of corrosion in seismic assessment of columns
International Journal of Structural Integrity
ISSN: 1757-9864
Article publication date: 4 September 2019
Issue publication date: 18 March 2020
Abstract
Purpose
Seismic assessment procedures of RC members quantify member strength, deformation capacity and failure mode using detailed information regarding member geometry and reinforcement amount and arrangement. However, the condition of the reinforcing materials is not explicitly accounted for in the calculation process. The paper aims to discuss this issue.
Design/methodology/approach
This problem is explored in the present paper through consistent evaluation of the evidence from a database of column tests which were subjected to cyclic lateral load reversals simulating earthquake effects after being subjected to accelerated corrosion. The column performance expressed in terms of the shear vs drift resistance envelope is introduced in the available methodologies of rapid assessment of reinforced concrete structures showcasing the limitations and uncertainties of the existing state of the art in the field of seismic assessment of existing structures.
Findings
Simple estimations as well as experimental observation show that the effect can be staggering, in terms of reduced deformation capacity, prevailing mode of failure and residual strength under seismic loading. It has been observed in the field that deterioration and ageing can reduce a well detailed structural component to behave as a poorly constructed one, by means of cover delamination, transverse and longitudinal bar area loss and steel embrittlement.
Originality/value
The amount of deterioration in the residual life of the component, in the face of a future seismic hazard, is fraught with uncertainty regarding the amount and intensity of material deprecation and the manner in which this may be considered in the logistics of the assessment process.
Keywords
Citation
El-Joukhadar, N., Tsiotsias, K. and Pantazopoulou, S. (2020), "Consideration of the state of corrosion in seismic assessment of columns", International Journal of Structural Integrity, Vol. 11 No. 2, pp. 239-247. https://doi.org/10.1108/IJSI-07-2019-0065
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited