ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Robust geotechnical design of rock bolts for stability of rock slopes using response surface

Pandit, Bhardwaj and Babu, Sivakumar GL and Raju, GD (2016) Robust geotechnical design of rock bolts for stability of rock slopes using response surface. In: International Conference on Recent Advances in Rock Engineering (RARE), NOV 16-18, 2016, Bengaluru, INDIA, pp. 217-222.

[img] PDF
Pro_Con_Rec_Adv_Roc_Eng_91_217_2016.pdf - Published Version

Download (448kB)
Official URL: http://dx.doi.org/10.2991/rare-16.2016.35

Abstract

Stability of rock slopes in many civil engineering projects involves installation of rock bolts for stabilization. Uncertainty in input parameters that determine the stability of rock slopes may lead to uncertainty in evaluating the factor of safety. Design of installed rock bolts must be optimized for safety requirements, cost efficiency and robustness. A design is considered robust if it is least sensitive to variation in input parameters. A well accepted quantity, Signal-to-Noise Ratio (SNR) is selected to be a robustness measure. Factor of safety of slope is evaluated using commercial software Phase2D. General purpose response surface as a surrogate model to Phase 2D simulation is created to model the system response for various designs. Reliability index for all the designs was calculated from the response surface via Monte Carlo simulations. Further analysis was performed on those designs which satisfy a threshold value of reliability index. A simplified Robust Geotechnical Design (RGD) methodology is adopted in which a number of single objective optimizations were performed to locate the position of acceptable design w.r.t. utopia point in a plot of cost vs. robustness. Finally the global knee point is taken to be the optimum design whose distance is minimum from the utopia point.

Item Type: Conference Proceedings
Additional Information: Copy right for this article belongs to the ATLANTIS PRESS, 29 AVENUE LAVMIERE, PARIS, 75019, FRANCE
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Depositing User: Id for Latest eprints
Date Deposited: 31 Jan 2017 05:34
Last Modified: 21 Feb 2019 11:47
URI: http://eprints.iisc.ac.in/id/eprint/56205

Actions (login required)

View Item View Item