Effect of structural uncertainties on seismic performance of moment frame rehabilitated with steel shear wall

In performance-based engineering, conservatism in acceptance criteria at structural performance levels has increased the cost of retrofitting. In seismic rehabilitation of structures, uncertainties associated with existing structures have been studied and rehabilitation guidelines have been applied...

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Bibliographic Details
Published inScientia Iranica. Transaction A, Civil engineering Vol. 28; no. 4; pp. 2010 - 2022
Main Authors Maddahi, M, Gerami, M, Naderpour, H
Format Journal Article
LanguageEnglish
Published Tehran Sharif University of Technology 01.07.2021
Subjects
Acceptance criteria
Concrete
Design
Epistemology
Fragility
Methods
Monte Carlo simulation
Performance evaluation
Random variables
Regulation
Rehabilitation
Reinforced concrete
Reliability analysis
Reliability engineering
Retrofitting
Risk assessment
Seismic engineering
Seismic response
Shear walls
Statistical analysis
Steel frames
Steel structures
Structural reliability
Uncertainty
Yield stress
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Summary:In performance-based engineering, conservatism in acceptance criteria at structural performance levels has increased the cost of retrofitting. In seismic rehabilitation of structures, uncertainties associated with existing structures have been studied and rehabilitation guidelines have been applied to deal with these uncertainties in terms of reliability index. The secondary system, which is added to the existing structure, is subject to uncertainties in seismic rehabilitation of structures. These uncertainties can escalate the uncertainties of rehabilitated structures and may change the analysis results such as reliability index parameter, values of fragility, and inter-story drift. Therefore, this study investigated the reliability of the structure rehabilitated with steel shear wall and performed a parametric study on the reliability index. The selected structure was a steel moment frame, which was rehabilitated by the steel shear wall. The structure was subject to incremental dynamic analysis before and after rehabilitation with probabilistic variables. Based on the results, the values of the reliability index were obtained for the rehabilitated structure in the presence of uncertainties. According to results, structural rehabilitation reduced failure probability and consideration of uncertainties in the rehabilitated structure increased the probability of failure. Therefore, existing conservatism was reduced.
DOI:10.24200/sci.2020.54252.3668