Reliability analysis of corroding RC members using adaptive Response Surface

M. Imran Rafiq, Alexandros Kallias

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBN

Abstract

Rebar corrosion is the most commonly observed deterioration mechanism in reinforced concrete (RC) structures leading to inadequate performance (e.g. increased deflections, loss of load capacity). Reliability analysis is a widely proposed tool to assess corroding RC structures, underpinning uncertainties in
quantifying the deterioration processes. Often, second moment methods such as FORM/SORM are used for the probabilistic performance assessment. These methods, however, require the performance function of the structure expressed in explicit form. Non-linear finite element analysis (NLFEA), an effective tool to model in detail the structural degradation mechanisms, yields the performance function an implicit form. In this paper, an adaptive procedure is presented for reliability analysis, which utilizes NLFEA and response surface method (RSM). The procedure is demonstrated through a case study using a corroding RC beam. The variation of concrete properties, impaired mechanical properties of the corroded rebars and bond deterioration are considered in the analysis. Results are presented for the load capacity and ductility limit states.
Original languageEnglish
Title of host publication11th International Conference on Applications of Statistics and Probability in Civil Engineering
Number of pages8
Publication statusPublished - 2011

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Reliability analysis
Deterioration
Reinforced concrete
Concrete construction
Electric load loss
Finite element method
Method of moments
Ductility
Loads (forces)
Concretes
Corrosion
Degradation
Mechanical properties

Cite this

Rafiq, M. I., & Kallias, A. (2011). Reliability analysis of corroding RC members using adaptive Response Surface. In 11th International Conference on Applications of Statistics and Probability in Civil Engineering
Rafiq, M. Imran ; Kallias, Alexandros. / Reliability analysis of corroding RC members using adaptive Response Surface. 11th International Conference on Applications of Statistics and Probability in Civil Engineering. 2011.
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abstract = "Rebar corrosion is the most commonly observed deterioration mechanism in reinforced concrete (RC) structures leading to inadequate performance (e.g. increased deflections, loss of load capacity). Reliability analysis is a widely proposed tool to assess corroding RC structures, underpinning uncertainties inquantifying the deterioration processes. Often, second moment methods such as FORM/SORM are used for the probabilistic performance assessment. These methods, however, require the performance function of the structure expressed in explicit form. Non-linear finite element analysis (NLFEA), an effective tool to model in detail the structural degradation mechanisms, yields the performance function an implicit form. In this paper, an adaptive procedure is presented for reliability analysis, which utilizes NLFEA and response surface method (RSM). The procedure is demonstrated through a case study using a corroding RC beam. The variation of concrete properties, impaired mechanical properties of the corroded rebars and bond deterioration are considered in the analysis. Results are presented for the load capacity and ductility limit states.",
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Rafiq, MI & Kallias, A 2011, Reliability analysis of corroding RC members using adaptive Response Surface. in 11th International Conference on Applications of Statistics and Probability in Civil Engineering.

Reliability analysis of corroding RC members using adaptive Response Surface. / Rafiq, M. Imran; Kallias, Alexandros.

11th International Conference on Applications of Statistics and Probability in Civil Engineering. 2011.

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBN

TY - GEN

T1 - Reliability analysis of corroding RC members using adaptive Response Surface

AU - Rafiq, M. Imran

AU - Kallias, Alexandros

PY - 2011

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N2 - Rebar corrosion is the most commonly observed deterioration mechanism in reinforced concrete (RC) structures leading to inadequate performance (e.g. increased deflections, loss of load capacity). Reliability analysis is a widely proposed tool to assess corroding RC structures, underpinning uncertainties inquantifying the deterioration processes. Often, second moment methods such as FORM/SORM are used for the probabilistic performance assessment. These methods, however, require the performance function of the structure expressed in explicit form. Non-linear finite element analysis (NLFEA), an effective tool to model in detail the structural degradation mechanisms, yields the performance function an implicit form. In this paper, an adaptive procedure is presented for reliability analysis, which utilizes NLFEA and response surface method (RSM). The procedure is demonstrated through a case study using a corroding RC beam. The variation of concrete properties, impaired mechanical properties of the corroded rebars and bond deterioration are considered in the analysis. Results are presented for the load capacity and ductility limit states.

AB - Rebar corrosion is the most commonly observed deterioration mechanism in reinforced concrete (RC) structures leading to inadequate performance (e.g. increased deflections, loss of load capacity). Reliability analysis is a widely proposed tool to assess corroding RC structures, underpinning uncertainties inquantifying the deterioration processes. Often, second moment methods such as FORM/SORM are used for the probabilistic performance assessment. These methods, however, require the performance function of the structure expressed in explicit form. Non-linear finite element analysis (NLFEA), an effective tool to model in detail the structural degradation mechanisms, yields the performance function an implicit form. In this paper, an adaptive procedure is presented for reliability analysis, which utilizes NLFEA and response surface method (RSM). The procedure is demonstrated through a case study using a corroding RC beam. The variation of concrete properties, impaired mechanical properties of the corroded rebars and bond deterioration are considered in the analysis. Results are presented for the load capacity and ductility limit states.

M3 - Conference contribution with ISSN or ISBN

BT - 11th International Conference on Applications of Statistics and Probability in Civil Engineering

ER -

Rafiq MI, Kallias A. Reliability analysis of corroding RC members using adaptive Response Surface. In 11th International Conference on Applications of Statistics and Probability in Civil Engineering. 2011