Determination of Pseudo-static Coefficient of Hybrid Soil Nail/MSE Walls Based on Seismic Performance Levels

Document Type : Research Paper

Authors

Abstract

In this research, it has been tried to correct the pseudo-static method based on seismic performance of hybrid soil nail/MSE walls as a newly developed method. Accordingly, the pseudo-static coefficient is introduced as a function of primary earthquake parameters such as predominant period, peak ground acceleration and cumulative absolute velocity, geotechnical characteristics in terms of site conditions and performance levels of system. In doing so, numerical analysis results with regard to performance levels of hybrid soil nail/MSE walls in various seismic and geotechnical conditions were taken into account. Subsequently, the pseudo-static coefficient corresponding to each of the studied numerical models was determined using limit-equilibrium analysis and the pseudo-static coefficients for performance levels were developed. The outputs are presented with reference to the site and seismic divisions separately according to Iranian Seismic Code (Standards No. 2800). Consequently, it is also shown that the choice of the pseudo-static coefficients for performance levels is highly affected by the type of the site and seismic conditions.

Keywords

References

استاندارد 2800 ایران. 1384. "آیین­نامه طراحی ساختمان­ها در برابر زلزله". ویرایش سوم.
کرامر، ا. 1378. "مهندسی ژئوتکنیک لرزه ­ای". ترجمه: مجدالدین میر محمد حسینی و بابک عارف پور، پژوهشگاه بین­ المللی زلزله شناسی و مهندسی زلزله، تهران.
یزداندوست، م. 1392. "مطالعه عددی و آزمایشگاهی برای تعیین عملکرد لرزه­ ای خاک و زمین مسلح شده با المان‏ های فولادی". رساله دکتری، دانشگاه تربیت مدرس.
AASHTO. 1998 "Interims: Standard Specifications for Highway Bridges". American Association of State Highway and Transportation Officials, Washington, D.C., USA.
Bathurst, R. J. and Hatami, K. 1998. "Influence of Reinforcement Stiffness, Length and Base Condition on Seismic Response of Geosynthetic Reinforced Soil Walls". Proc. of the 6th International Conference on Geosynthetics, USA, pp. 613-616.
Budek, A. 2004. “Research Proposal for TxDOT Project No. 0-5205: Design Procedure for MSE/Soil Nail Hybrid Retaining Wall Systems”. Lubbock, Texas Tech. Univ., Dept. of Civil Eng.
Chai, J. and Carter, J. P. 2009. "Deformation Analysis in Soft Ground Improvement". Springer.
Daniel, A. and Thome, P. E. 2005. “Rehabilitation of an Existing Mechanically Stabilized Earth Wall using Soil Nails”. DFI’s 30th Annual Conference on Deep Foundations, Chicago, Illinois, September 22-24.
Fan, C. C. and Hsiao, C. F. 2011. “Field performance of a hybrid reinforced earth embankment built adjacent to a slope with narrow fill space”. J. Geoeng. 6(1): 47-62.
Federal Highway Administration . 2003. “Soil Nail Walls”. Publication No. FHWAOIF-03-017.
FHWA. 2006. "Shored Mechanically Stabilized Earth (SMSE) Wall Systems Design Guidelines". Publication No. FHWA-CFL/TD-06-001, National Highway Institute.
FLAC Manual. 2005. Ver. 5.0, Itasca, USA.
Ishihara, K. and Asal, A. M. 1982. ''Dynamic Behavior of Soils, Soil Amplification and Soil Structure Interaction''. Final Report for Working Group D., UNDP/UNESCO project on earthquake risk reduction in Balkan region.
Jafari, M. K., Shafiee, A. and Ramzkhah, A. 2002. “Dynamic properties of the fine grained soils in south of Tehran,” J. Seismol. Earthq. Eng. 4: 25-35.
Seed, H. B., Wong, T. R., Idriss, I. M. and Tokimatsu, K. 1986. "Moduli and damping factors for dynamic analyses of cohesionless soils". J. Geotech. Eng. 112(11): 1016-1032.
Sharif, E. Y., Al Bis, A. A. and Harb, M. K. 2008. “An Application of Geophysical Techniques for Determining Dynamic Properties of the Ground in Dubailand Area, UAE”. Arab Center for Engineering Studies.

Files

History

  • Receive Date: 12 June 2014
  • Accept Date: 12 June 2014

Share

How to cite

Statistics