Reliability of stainless steel frames designed using the Direct Design Method in serviceability limit states
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hdl:2117/371775
Tipus de documentArticle
Data publicació2022-09
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Abstract
Steel structures can be consistently and efficiently designed using system-based design-by-analysis approaches such as the Direct Design Method. However, since direct design approaches lead to potentially lighter structural configurations, they can also result in larger deformations under service loads. Thus, greater attention may be required to serviceability limit states in structures designed using design-by-analysis approaches than for structures designed elastically at their ultimate limit state following current two-stage approaches, especially for materials showing highly nonlinear stress vs strain responses such as stainless steel alloys. With the aim of investigating the influence of allowing larger deformations in the ultimate limit state design of stainless steel structures, this paper presents an explicit analysis framework for assessing serviceability reliability at system level. Using this framework, the paper investigates the serviceability reliability of cold-formed stainless steel portal frames designed using the Direct Design Method for different load cases, including the gravity load and the combined gravity plus wind load combinations. The study considers six baseline frames covering the most common stainless steel families and international design frameworks (i.e., Eurocode, US and Australian frameworks), for which the reliability of vertical deflection and lateral drift serviceability limit states is investigated using advanced numerical simulations and First-Order Reliability Methods. From the comparison of the calculated average annual reliability indices and the relevant target reliabilities for the different design frameworks, it was found that the reliability of stainless steel frames appears to be adequate for the serviceability limit states investigated for the Eurocode, US and Australian frameworks.
DatasetArrayago Luquin, I.; Rasmussen, K.J.R. (2022). Stiffness of randomly sampled stainless steel frames under gravity and gravity plus wind load scenarios [Dataset]. 1 v. Universitat Politècnica de Catalunya. https://doi.org/10.5281/zenodo.6976116
http://hdl.handle.net/2117/372547
CitacióArrayago, I.; Rasmussen, K.J.R. Reliability of stainless steel frames designed using the Direct Design Method in serviceability limit states. "Journal of constructional steel research", Setembre 2022, vol. 196, núm. 107425, p. 107425:1-107425:16.
ISSN0143-974X
Versió de l'editorhttps://www.sciencedirect.com/science/article/pii/S0143974X22002978
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