Model error for Australian code shear capacity of concrete structures

M. M. Melhem, C. Caprani, M. G. Stewart

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

Reliability assessment informs on the level of safety of existing structures. To do this, the variability in capacity and loading must be first quantified. Uncertainty in predicting capacity (known as model error or ME), when compared with experimental values, should be included. The modified compression field theory (MCFT) is found to closely predict the shear capacity in concrete members. The Australian standards for concrete structures include a simplified codified version of MCFT similar to that in the Canadian standards. While the ME for the codified MCFT in the Canadian standards is published, it is not known whether this is the same for the Australian-codified MCFT. Hence, this study aims to determine the ME for the Australian standards in concrete shear capacity estimated with MCFT. Based on a Super-T girder designed to AS 5100.5 (2017) [11], the response surface methodology is used to provide a surrogate shear capacity model based on the most important parameters. It is found the Australian ME is less than the Canadian ME. The calculated ME can be used for future reliability analysis of Australian concrete structures in ultimate shear. More broadly, the methodology can be used for determining ME for other codified models, and for other limit states such as ultimate bending.

Original languageEnglish
Title of host publicationACMSM25
Subtitle of host publicationProceedings of the 25th Australasian Conference on Mechanics of Structures and Materials
EditorsChien Ming Wang, Johnny C. M. Ho, Sritawat Kitipornchai
Place of PublicationSingapore
PublisherSpringer
Pages327-336
Number of pages10
ISBN (Electronic)9789811376030
ISBN (Print)9789811376023
DOIs
Publication statusPublished - 2020
EventAustralasian Conference on the Mechanics of Structures and Materials 2018 - Brisbane, Australia
Duration: 4 Dec 20187 Dec 2018
Conference number: 25th
https://acmsm25.com.au/

Publication series

NameLecture Notes in Civil Engineering
PublisherSpringer
Volume37
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

ConferenceAustralasian Conference on the Mechanics of Structures and Materials 2018
Abbreviated titleACMSM 2018
CountryAustralia
CityBrisbane
Period4/12/187/12/18
Internet address

Keywords

  • Australian standards
  • Concrete
  • MCFT
  • Model error
  • Response surface
  • Shear

Cite this

Melhem, M. M., Caprani, C., & Stewart, M. G. (2020). Model error for Australian code shear capacity of concrete structures. In C. M. Wang, J. C. M. Ho, & S. Kitipornchai (Eds.), ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials (pp. 327-336). (Lecture Notes in Civil Engineering; Vol. 37). Singapore: Springer. https://doi.org/10.1007/978-981-13-7603-0_33
Melhem, M. M. ; Caprani, C. ; Stewart, M. G. / Model error for Australian code shear capacity of concrete structures. ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials. editor / Chien Ming Wang ; Johnny C. M. Ho ; Sritawat Kitipornchai. Singapore : Springer, 2020. pp. 327-336 (Lecture Notes in Civil Engineering).
@inproceedings{81e7a3922c434f019f059bd480ed6999,
title = "Model error for Australian code shear capacity of concrete structures",
abstract = "Reliability assessment informs on the level of safety of existing structures. To do this, the variability in capacity and loading must be first quantified. Uncertainty in predicting capacity (known as model error or ME), when compared with experimental values, should be included. The modified compression field theory (MCFT) is found to closely predict the shear capacity in concrete members. The Australian standards for concrete structures include a simplified codified version of MCFT similar to that in the Canadian standards. While the ME for the codified MCFT in the Canadian standards is published, it is not known whether this is the same for the Australian-codified MCFT. Hence, this study aims to determine the ME for the Australian standards in concrete shear capacity estimated with MCFT. Based on a Super-T girder designed to AS 5100.5 (2017) [11], the response surface methodology is used to provide a surrogate shear capacity model based on the most important parameters. It is found the Australian ME is less than the Canadian ME. The calculated ME can be used for future reliability analysis of Australian concrete structures in ultimate shear. More broadly, the methodology can be used for determining ME for other codified models, and for other limit states such as ultimate bending.",
keywords = "Australian standards, Concrete, MCFT, Model error, Response surface, Shear",
author = "Melhem, {M. M.} and C. Caprani and Stewart, {M. G.}",
year = "2020",
doi = "10.1007/978-981-13-7603-0_33",
language = "English",
isbn = "9789811376023",
series = "Lecture Notes in Civil Engineering",
publisher = "Springer",
pages = "327--336",
editor = "Wang, {Chien Ming} and Ho, {Johnny C. M.} and Sritawat Kitipornchai",
booktitle = "ACMSM25",

}

Melhem, MM, Caprani, C & Stewart, MG 2020, Model error for Australian code shear capacity of concrete structures. in CM Wang, JCM Ho & S Kitipornchai (eds), ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials. Lecture Notes in Civil Engineering, vol. 37, Springer, Singapore, pp. 327-336, Australasian Conference on the Mechanics of Structures and Materials 2018, Brisbane, Australia, 4/12/18. https://doi.org/10.1007/978-981-13-7603-0_33

Model error for Australian code shear capacity of concrete structures. / Melhem, M. M.; Caprani, C.; Stewart, M. G.

ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials. ed. / Chien Ming Wang; Johnny C. M. Ho; Sritawat Kitipornchai. Singapore : Springer, 2020. p. 327-336 (Lecture Notes in Civil Engineering; Vol. 37).

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

TY - GEN

T1 - Model error for Australian code shear capacity of concrete structures

AU - Melhem, M. M.

AU - Caprani, C.

AU - Stewart, M. G.

PY - 2020

Y1 - 2020

N2 - Reliability assessment informs on the level of safety of existing structures. To do this, the variability in capacity and loading must be first quantified. Uncertainty in predicting capacity (known as model error or ME), when compared with experimental values, should be included. The modified compression field theory (MCFT) is found to closely predict the shear capacity in concrete members. The Australian standards for concrete structures include a simplified codified version of MCFT similar to that in the Canadian standards. While the ME for the codified MCFT in the Canadian standards is published, it is not known whether this is the same for the Australian-codified MCFT. Hence, this study aims to determine the ME for the Australian standards in concrete shear capacity estimated with MCFT. Based on a Super-T girder designed to AS 5100.5 (2017) [11], the response surface methodology is used to provide a surrogate shear capacity model based on the most important parameters. It is found the Australian ME is less than the Canadian ME. The calculated ME can be used for future reliability analysis of Australian concrete structures in ultimate shear. More broadly, the methodology can be used for determining ME for other codified models, and for other limit states such as ultimate bending.

AB - Reliability assessment informs on the level of safety of existing structures. To do this, the variability in capacity and loading must be first quantified. Uncertainty in predicting capacity (known as model error or ME), when compared with experimental values, should be included. The modified compression field theory (MCFT) is found to closely predict the shear capacity in concrete members. The Australian standards for concrete structures include a simplified codified version of MCFT similar to that in the Canadian standards. While the ME for the codified MCFT in the Canadian standards is published, it is not known whether this is the same for the Australian-codified MCFT. Hence, this study aims to determine the ME for the Australian standards in concrete shear capacity estimated with MCFT. Based on a Super-T girder designed to AS 5100.5 (2017) [11], the response surface methodology is used to provide a surrogate shear capacity model based on the most important parameters. It is found the Australian ME is less than the Canadian ME. The calculated ME can be used for future reliability analysis of Australian concrete structures in ultimate shear. More broadly, the methodology can be used for determining ME for other codified models, and for other limit states such as ultimate bending.

KW - Australian standards

KW - Concrete

KW - MCFT

KW - Model error

KW - Response surface

KW - Shear

UR - http://www.scopus.com/inward/record.url?scp=85072083544&partnerID=8YFLogxK

U2 - 10.1007/978-981-13-7603-0_33

DO - 10.1007/978-981-13-7603-0_33

M3 - Conference Paper

SN - 9789811376023

T3 - Lecture Notes in Civil Engineering

SP - 327

EP - 336

BT - ACMSM25

A2 - Wang, Chien Ming

A2 - Ho, Johnny C. M.

A2 - Kitipornchai, Sritawat

PB - Springer

CY - Singapore

ER -

Melhem MM, Caprani C, Stewart MG. Model error for Australian code shear capacity of concrete structures. In Wang CM, Ho JCM, Kitipornchai S, editors, ACMSM25: Proceedings of the 25th Australasian Conference on Mechanics of Structures and Materials. Singapore: Springer. 2020. p. 327-336. (Lecture Notes in Civil Engineering). https://doi.org/10.1007/978-981-13-7603-0_33