Uncertainties in the South African wind load design formulation

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dc.contributor.authorBotha, Jacquesen_ZA
dc.contributor.authorRetief, Johan V.en_ZA
dc.contributor.authorViljoen, Celesteen_ZA
dc.date.accessioned2019-10-11T13:00:11Z
dc.date.available2019-10-11T13:00:11Z
dc.date.issued2018
dc.descriptionCITATION: Botha, J., Retief, J. V. & Viljoen, C. 2018. Uncertainties in the South African wind load design formulation. Journal of the South African Institution of Civil Engineering, 60(3):16-29, doi:10.17159/2309-8775/2018/v60n3a2.
dc.descriptionThe original publication is available at http://www.scielo.org.za
dc.description.abstractThis paper presents an investigation of the uncertainties inherent in the South African formulation of design wind loads on structures, as stipulated by SANS 10160-3:2011. The investigation follows from the identification of anomalous values in the existing South African probabilistic wind load models during a reliability assessment of SANS 10160. The primary wind load components which have the greatest effect on the total wind load uncertainty are identified as the time variant free-field wind pressure, followed by the time invariant pressure coefficients and terrain roughness factors. A rational and transparent reliability framework for the quantification of the uncertainties inherent in the formulation of these components is then presented. Probabilistic models of these components were developed following independent investigations of each component. The results from these investigations show that the existing probabilistic wind load models underestimate the uncertainty of the wind load components, particularly when considering the time invariant components.en_ZA
dc.description.urihttp://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-20192018000300002&lng=en&nrm=iso&tlng=en
dc.description.versionPublisher's version
dc.format.extent14 pages
dc.identifier.citationBotha, J., Retief, J. V. & Viljoen, C. 2018. Uncertainties in the South African wind load design formulation. Journal of the South African Institution of Civil Engineering, 60(3):16-29, doi:10.17159/2309-8775/2018/v60n3a2
dc.identifier.issn2309-8775 (online)
dc.identifier.issn1021-2019 (print)
dc.identifier.otherdoi:10.17159/2309-8775/2018/v60n3a2
dc.identifier.urihttp://hdl.handle.net/10019.1/106631
dc.language.isoen_ZAen_ZA
dc.publisherSouth African Institution of Civil Engineering
dc.rights.holderAuthors retain copyright
dc.subjectWind loading codeen_ZA
dc.subjectWind load probability modellingen_ZA
dc.subjectWind-pressure -- Mathematical modelsen_ZA
dc.subjectUncertainty -- Mathematical modelsen_ZA
dc.subjectWind-pressure -- South Africaen_ZA
dc.titleUncertainties in the South African wind load design formulationen_ZA
dc.typeArticleen_ZA
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