Economical design of buried concrete pipes subjected to UK standard traffic loading

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@article{4a91f17467404c47aa65c07c1e7121d2,
title = "Economical design of buried concrete pipes subjected to UK standard traffic loading",
abstract = "The British Standard (BS) uses the indirect design method to design buried concrete pipes under the effect of traffic load, where in this method the laboratory capacity of the pipe is obtained and linked to the field capacity using an empirical factor called the bedding factor. However, the BS design bedding factors have not been rigorously tested. This paper therefore presents a rigorous analysis of the response of buried pipes under the BS traffic loading requirements and tests the robustness of the BS design bedding factors using a validated finite element model. It was found that the BS bedding factors are overly conservative with a ratio of calculated values to the design bedding factors ranging from 1.63 to 4.92. This over conservatism is due to the oversimplification in the BS methodology for calculating the force applied to the pipe. Therefore, new bedding factors have been proposed utilising the evolutionary polynomial regression analysis technique. These bedding factors implicitly account for the error due to the oversimplification in the design force calculation. Hence, more economical and robust designs can be achieved by using the new bedding factors.",
keywords = "pipes and pipelines, design methods and aids, structures and design",
author = "Saif Alzabeebee and David Chapman and Asaad Faramarzi",
year = "2018",
month = mar,
day = "9",
doi = "10.1680/jstbu.17.00035",
language = "English",
journal = "Institution of Civil Engineers. Proceedings. Structures and Buildings",
issn = "0965-0911",
publisher = "Thomas Telford",

}

RIS

TY - JOUR

T1 - Economical design of buried concrete pipes subjected to UK standard traffic loading

AU - Alzabeebee, Saif

AU - Chapman, David

AU - Faramarzi, Asaad

PY - 2018/3/9

Y1 - 2018/3/9

N2 - The British Standard (BS) uses the indirect design method to design buried concrete pipes under the effect of traffic load, where in this method the laboratory capacity of the pipe is obtained and linked to the field capacity using an empirical factor called the bedding factor. However, the BS design bedding factors have not been rigorously tested. This paper therefore presents a rigorous analysis of the response of buried pipes under the BS traffic loading requirements and tests the robustness of the BS design bedding factors using a validated finite element model. It was found that the BS bedding factors are overly conservative with a ratio of calculated values to the design bedding factors ranging from 1.63 to 4.92. This over conservatism is due to the oversimplification in the BS methodology for calculating the force applied to the pipe. Therefore, new bedding factors have been proposed utilising the evolutionary polynomial regression analysis technique. These bedding factors implicitly account for the error due to the oversimplification in the design force calculation. Hence, more economical and robust designs can be achieved by using the new bedding factors.

AB - The British Standard (BS) uses the indirect design method to design buried concrete pipes under the effect of traffic load, where in this method the laboratory capacity of the pipe is obtained and linked to the field capacity using an empirical factor called the bedding factor. However, the BS design bedding factors have not been rigorously tested. This paper therefore presents a rigorous analysis of the response of buried pipes under the BS traffic loading requirements and tests the robustness of the BS design bedding factors using a validated finite element model. It was found that the BS bedding factors are overly conservative with a ratio of calculated values to the design bedding factors ranging from 1.63 to 4.92. This over conservatism is due to the oversimplification in the BS methodology for calculating the force applied to the pipe. Therefore, new bedding factors have been proposed utilising the evolutionary polynomial regression analysis technique. These bedding factors implicitly account for the error due to the oversimplification in the design force calculation. Hence, more economical and robust designs can be achieved by using the new bedding factors.

KW - pipes and pipelines

KW - design methods and aids

KW - structures and design

U2 - 10.1680/jstbu.17.00035

DO - 10.1680/jstbu.17.00035

M3 - Article

JO - Institution of Civil Engineers. Proceedings. Structures and Buildings

JF - Institution of Civil Engineers. Proceedings. Structures and Buildings

SN - 0965-0911

ER -