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Seismic Stability of Unsupported Vertical Circular Excavations in c-φ Soil
https://orcid.org/http://orcid.org/0000-0002-1760-9838
In this study, the seismic stability of vertical circular excavations in cohesive-frictional soil considering the effect of pseudo-static seismic body force is examined. The lower bound and upper bound solutions for the seismic stability of the axisymmetric excavations are determined using the three-dimensional finite element limit analysis. The results show that the dimensionless seismic stability number can be presented as a function of three dimensionless variables including the excavated height ratio, the soil’s effective friction angle, and the coefficient of horizontal earthquake acceleration. The coefficient of vertical earthquake acceleration is set to be zero since it has insignificant influence on the results. The failure mechanisms of the problem are also illustrated to indicate the influences of the soil’s effective friction angle and the coefficient of horizontal earthquake acceleration. At the end of the study, a case study to demonstrate the application of the proposed seismic stability number for the circular excavations in seismic active regions is presented.
Seismic Stability of Unsupported Vertical Circular Excavations in c-φ Soil
https://orcid.org/http://orcid.org/0000-0002-1760-9838
In this study, the seismic stability of vertical circular excavations in cohesive-frictional soil considering the effect of pseudo-static seismic body force is examined. The lower bound and upper bound solutions for the seismic stability of the axisymmetric excavations are determined using the three-dimensional finite element limit analysis. The results show that the dimensionless seismic stability number can be presented as a function of three dimensionless variables including the excavated height ratio, the soil’s effective friction angle, and the coefficient of horizontal earthquake acceleration. The coefficient of vertical earthquake acceleration is set to be zero since it has insignificant influence on the results. The failure mechanisms of the problem are also illustrated to indicate the influences of the soil’s effective friction angle and the coefficient of horizontal earthquake acceleration. At the end of the study, a case study to demonstrate the application of the proposed seismic stability number for the circular excavations in seismic active regions is presented.
Seismic Stability of Unsupported Vertical Circular Excavations in c-φ Soil
https://orcid.org/http://orcid.org/0000-0002-1760-9838
In this study, the seismic stability of vertical circular excavations in cohesive-frictional soil considering the effect of pseudo-static seismic body force is examined. The lower bound and upper bound solutions for the seismic stability of the axisymmetric excavations are determined using the three-dimensional finite element limit analysis. The results show that the dimensionless seismic stability number can be presented as a function of three dimensionless variables including the excavated height ratio, the soil’s effective friction angle, and the coefficient of horizontal earthquake acceleration. The coefficient of vertical earthquake acceleration is set to be zero since it has insignificant influence on the results. The failure mechanisms of the problem are also illustrated to indicate the influences of the soil’s effective friction angle and the coefficient of horizontal earthquake acceleration. At the end of the study, a case study to demonstrate the application of the proposed seismic stability number for the circular excavations in seismic active regions is presented.
Seismic Stability of Unsupported Vertical Circular Excavations in c-φ Soil
Transp. Infrastruct. Geotech.
Petchkaew, Patteera (author) / Keawsawasvong, Suraparb (author) / Tanapalungkorn, Weeradetch (author) / Likitlersuang, Suched (author)
Transportation Infrastructure Geotechnology ; 10 ; 165-179
2023-04-01
15 pages
Article (Journal)
Electronic Resource
English
Seismic Stability of Unsupported Vertical Circular Excavations in c-φ Soil
| Springer Verlag | 2023
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