Global sensitivity analysis of certain and uncertain factors for a circular tunnel under seismic action

There are many certain and uncertain design factors which have unrevealed rational effects on the generation of tensile damage and the stability of the circular tunnels during seismic actions. In this research paper, we have dedicated three certain and four uncertain design factors to quantify their...

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Bibliographic Details
Published in:Frontiers of Structural and Civil Engineering 2019-12, Vol.13 (6), p.1289-1300
Main Authors: NARIMAN, Nazim Abdul, HUSSAIN, Raja Rizwan, MOHAMMAD, Ilham Ibrahim, KARAMPOUR, Peyman
Format: Article
Language:English
Subjects:
Circularity
Cities
Civil Engineering
Computer simulation
Concrete
Countries
Density
Design factors
Earthquake damage
Engineering
maximum overall displacement
maximum principal stress
Modulus of elasticity
Regions
Research Article
Scientific papers
Seismic response
Seismic stability
Sensitivity analysis
shear waves
Sobol's sensitivity indices
Structural stability
tensile damage
Tunnel linings
Tunnels
Variance analysis
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Summary:There are many certain and uncertain design factors which have unrevealed rational effects on the generation of tensile damage and the stability of the circular tunnels during seismic actions. In this research paper, we have dedicated three certain and four uncertain design factors to quantify their rational effects using numerical simulations and the Sobol's sensitivity indices. Main effects and interaction effects between the design factors have been determined supporting on variance-based global sensitivity analysis. The results detected that the concrete modulus of elasticity for the tunnel lining has the greatest effect on the tensile damage generation in the tunnel lining during the seismic action. In the other direction, the interactions between the concrete density and both of concrete modulus of elasticity and tunnel diameter have appreciable effects on the tensile damage. Furthermore, the tunnel diameter has the deciding effect on the stability of the tunnel structure. While the interaction between the tunnel diameter and concrete density has appreciable effect on the stability process. It is worthy to mention that Sobol's sensitivity indices manifested strong efficiency in detecting the roles of each design factor in cooperation with the numerical simulations explaining the responses of the circular tunnel during seismic actions.
ISSN:2095-2430
2095-2449
DOI:10.1007/s11709-019-0548-0