Design of Metal Building Roof Purlins Including System Reliability Effects

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dc.contributor.authorTorabian, S.
dc.contributor.authorSchafer, B.W.
dc.date.accessioned2020-06-02T18:27:56Z
dc.date.available2020-06-02T18:27:56Z
dc.date.issued2020-06
dc.descriptionFinal Project Reporten_US
dc.description.abstractThis report provides a framework to incorporate structural system reliability effects in the design of roof purlins in a typical metal building. Today every roof purlin is considered as a separate component and the effect of spatial variation in the demand loads and potential redistribution and load sharing in the roof system capacity are ignored in design. Component reliability is established by first-order reliability methods implemented through load and resistance factor design. Based on recent work in loading bearing cold-formed steel framing systems the load and resistance factor design framework is extended from components to systems through an additional resistance factor to account for system influence. An archetypical metal building is designed and selected for this study. Monte Carlo simulations of a segment of the metal building roof are performed with consideration of both randomness in the demands and capacity and employing geometric and material nonlinearity in the response model of the roof. The simulations indicate that the system effect in metal building roofs is beneficial, and increases in the design capacity when evaluated against demands may be appropriate. Sensitivity to the target reliability (allowed probability of failure), deflection limits, and modeling assumptions are observed and discussed. Preliminary factors to account for roof system reliability are provided.en_US
dc.description.sponsorshipMetal Building Manufacturers Association (MBMA)en_US
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/62381
dc.relation.ispartofseriesCFSRC;R-2020-05
dc.subjectMetal building, purlin, system reliabilityen_US
dc.titleDesign of Metal Building Roof Purlins Including System Reliability Effectsen_US
dc.typeTechnical Reporten_US
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