COI code: ICSAU06_0259
Paper Language: English
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Authors Reliability Related to Factor of Safety and Uncertaintya Golmohamadi - Chief executive officer of ParsBonyan Consultant Company, Kerman ,Iran
a sanei - Assistant Director of ParsBonyan Consultant Company, Kerman ,Iran
m.y dadrass - Civil Engineering Department, Islamic Azad University, Kerman Branch, Kerman, Iran
s khoshghadam - Civil Engineering Department, Shiraz University of Technology, Shiraz, Iran
Abstract:Many engineers have recognized that the value of the factor of safety of a geotechnical structure is less important than its reliability or the probability of failure. In this context failure is defined according to Leonards’ well-known description as unacceptable difference between expected and observed performance. Considering any type of structure or system for which a factor of safety can be computed, placing all the known and unknown uncertainties into the standard deviation of the factor of safety, and assuming that the factor of safety is normally or lognormally distributed, we can find the relation between the probability of failure, the expected value of the factor of safety, and the variance in the factor of safety. In addition to providing a quick graphic estimate of the probability of failure the resulting plots reveal that, when the standard deviation exceeds approximately 0.3, increasing the expected value of the factor of safety has little effect on the probability of failure. In such cases reducing the uncertainty by better engineering is more effective in improving reliability than increasing the target factor of safety. The results apply to any type of structure and any mode of failure.
Keywords:Reliability Analysis, Uncertainty, Factor of Safety, Probability of Failure
COI code: ICSAU06_0259
how to cite to this paper:If you want to refer to this article in your research, you can easily use the following in the resources and references section:
Golmohamadi, a; a sanei; m.y dadrass & s khoshghadam, 2019, Reliability Related to Factor of Safety and Uncertainty, 6th. National Congress on civil engineering, architecture and urban development, تهران- دانشگاه علم و صنعت ايران, دبيرخانه دائمي كنگره-دانشگاه ميعاد با همكاري دانشگاه شيراز - دانشگاه مراغه و دانشگاه علم و صنعت ايران, https://www.civilica.com/Paper-ICSAU06-ICSAU06_0259.htmlInside the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Golmohamadi, a; a sanei; m.y dadrass & s khoshghadam, 2019)
Second and more: (Golmohamadi; sanei; dadrass & khoshghadam, 2019)
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