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Reliability of Static and Seismic Design of Near Slope Shallow Foundations Following Iranian Code and Eurocode 7
In geotechnical engineering, probability theory can be implemented regarding a reliability-based design to investigate the probability of failure. In this research, a practical probabilistic approach is used to calculate the reliability of a footing design by applying the first-order reliability method (FORM). The reliability and design risk level of deterministic approaches proposed by Iranian code and Eurocode 7 is evaluated. Both the static and seismic designs have been discussed. The distance of the foundation, both near the crest of the slope and away from it, has also been considered. An entire analysis has been done regarding the three most important different soil types to investigate the effect of soil shear strength parameters on reliability. Although the Iranian code presented a more conservative result than Eurocode 7 did in the static design, there was no tangible difference in the seismic mode. Generally, target reliability was not satisfied in any of the deterministic design approaches. In cases where shallow foundations were located near the crest of the slopes, the difference in the results of RBD and deterministic methods would increase. Finally, it can be concluded that the soil type plays an important role in the results obtained from the Iranian code. In granular soils, the reliability of designs based on Iranian code is low (β = 1.80), so this may be a high risk, which should be considered. On the contrary, the best circumstance (β = 3.40) was related to the foundations that are based on cohesive soils.
Reliability of Static and Seismic Design of Near Slope Shallow Foundations Following Iranian Code and Eurocode 7
In geotechnical engineering, probability theory can be implemented regarding a reliability-based design to investigate the probability of failure. In this research, a practical probabilistic approach is used to calculate the reliability of a footing design by applying the first-order reliability method (FORM). The reliability and design risk level of deterministic approaches proposed by Iranian code and Eurocode 7 is evaluated. Both the static and seismic designs have been discussed. The distance of the foundation, both near the crest of the slope and away from it, has also been considered. An entire analysis has been done regarding the three most important different soil types to investigate the effect of soil shear strength parameters on reliability. Although the Iranian code presented a more conservative result than Eurocode 7 did in the static design, there was no tangible difference in the seismic mode. Generally, target reliability was not satisfied in any of the deterministic design approaches. In cases where shallow foundations were located near the crest of the slopes, the difference in the results of RBD and deterministic methods would increase. Finally, it can be concluded that the soil type plays an important role in the results obtained from the Iranian code. In granular soils, the reliability of designs based on Iranian code is low (β = 1.80), so this may be a high risk, which should be considered. On the contrary, the best circumstance (β = 3.40) was related to the foundations that are based on cohesive soils.
Reliability of Static and Seismic Design of Near Slope Shallow Foundations Following Iranian Code and Eurocode 7
Int J Civ Eng
Shojaeian, Ali (author) / Askari, Faradjollah (author)
International Journal of Civil Engineering ; 18 ; 405-417
2020-04-01
13 pages
Article (Journal)
Electronic Resource
English
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