What is it about?
This paper presents a nonlinear analysis procedure for the seismic performance assessment of deteriorated reinforced concrete bridges using a modified damage index. A finite element analysis program, RCAHEST (Reinforced Concrete Analysis in Higher Evaluation System Technology), is used to analyze deteriorated two-span simply-supported reinforced concrete bridges. The new nonlinear material models for deteriorated reinforced concrete behaviors were proposed, considering corrosion effects as shown in a reduction in reinforcement section and bond strength. A modified damage index aims to quantify the seismic performance level in deteriorated reinforced concrete bridges. Several parameters of two-span simply-supported deteriorated reinforced concrete bridge have been studied to determine the seismic performance levels. The newly developed analytical method for assessing the seismic performance of deteriorated reinforced concrete bridges is verified by comparison with the experimental and analytical parameter results.
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Why is it important?
The new nonlinear material models for deteriorated reinforced concrete behaviors were proposed, considering corrosion effects as shown in a reduction in reinforcement section and bond strength. A modified damage index aims to quantify the seismic performance level in deteriorated reinforced concrete bridges.
Perspectives
I hope this article is to provide the seismic performance assessment of deteriorated reinforced concrete bridges using a modified damage index. A two-dimensional reinforced concrete plane stress element for nonlinear analysis of concrete structures exposed to corrosion has been presented. The proposed formulation allows to model the damage effects of uniform and pitting corrosion in terms of reduction of cross-sectional area of corroded bars, reduction of ductility of reinforcing steel, deterioration of concrete strength and spalling of concrete cover.
Dr Tae-Hoon Kim
Korea Railroad Research Institute
Read the Original
This page is a summary of: Seismic Performance Assessment of Deteriorated Two-Span Reinforced Concrete Bridges, International Journal of Concrete Structures and Materials, January 2022, Springer Science + Business Media,
DOI: 10.1186/s40069-022-00498-9.
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