Evaluation on the Soil Flexibility of the Largest HEP Dam Area in East Malaysia using 1-D Equivalent Linear Analysis

Raudhah Ahmadi, Muhammad Haniz Azahari Muhamad Suhaili, Imtiyaz Akbar Najar, Muhammad Azmi Ladi, Nisa Aqila Bakie, Ahmed Faysal Abdullahi

Abstract


This paper presents the evaluation of soil flexibility at the vicinity of the Bakun HEP Dam, the largest in East Malaysia. The dam is located in the Belaga District of Sarawak, approximately 50 km from the active Tubau and Bukit Mersing fault lines. This area experienced earthquakes of magnitudes ranging between 3.5 and 5.4 during the period from 1994 and 2010. This study used global and local earthquake records to evaluate the site specific seismic hazard using a 1-D equivalent linear analysis. SPT data from 15 boreholes are utilized. Soil flexibility, factor of safety, liquefaction probability and potential index are evaluated to ascertain the ground settlement and soil liquefaction effects. The results show that the ground amplification of Belaga District is between 2.445 and 5.146, while the peak ground accelerations (PGA) at ground surface are at a maximum average of 0.25g PGA. The soil factors for Bakun District range from 2.6 - 3.0, for 2% POE in 50 years. This corresponds to a 2475 year return period. The response spectra are found matching with the target design response spectra for Sarawak as reported in the Malaysia National Annex (MS EN 1998-1:2015). The effects of soil liquefaction are found to be insignificant, as a result the nearby Bakun HEP dam is considered safe from any ground settlement. This study highlights the importance of evaluating the ability of new or existing structures in Belaga District to withstand up to 0.25g PGA in case any seismic event should occur in the future. 


Keywords


Soil flexibility; Belaga district Sarawak; seismic design response spectra; soil liquefaction hazard assessment.

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References


R. Hall, and H.T. Breitfeld, “Nature and Demise of the Proto-South China Seaâ€. Bulletin of Geological Society of Malaysia, 63(63) pp. 61-87, 2017

R. McCaffrey, “The Tectonic Framework of the Sumatran Subduction Zone,†Annu. Rev. Earth Planet. Sci., vol. 37 pp. 345-366, 2009.

A. E. Khalil, I. A. Abir, H. Ginsos, H. E. A. Hafiez, and S. Khan, “Probabilistic seismic hazard assessments of Sabah, east Malaysia: accounting for local earthquake activity near Ranau,†Journal of Geophysics and Engineering., vol.15, pp. 13–25, 2017.

A. A. Shah, M. N. Zhafri, J. Delson, and M. B. Navakanesh, “Major Strike-Slip Faults Identified Using Satellite Data in Central Borneo, SE Asia.†Geosciences., vol. 8(5):156 May. 2018.

A. S. W. Yan, “Geological Assessment of the Earthquake Sources & Hazard in Malaysia.†Seminar Teknikal Gempabumi, JMM, Dec. 2011.

M. Syifa, P. R. Kadavi, and C.W. Lee, “An Artificial Intelligence Application for Post-Earthquake Damage Mapping in Palu, Central Sulawesi, Indonesia.†Sensors., vol. 19, 542, 2019.

L. J. Hill, R. S. J. Sparks, and J. C. Rougier, Risk and Uncertainty Assessment for Natural Hazards, Cambridge: Cambridge Unviersity Press, 2013.

D. T. W. Looi, J. C. L. Chiang, H. H. Tsang, and N. T. K. Lam, “Potential Issues Faced on Reservoir-Triggered Earthquakes in Malaysiaâ€. Proceedings of the 1st International Conference on Dam Safety Management and Engineering. ICDSME 2019

R. Vicente, S. Parodi, S. Lagomarsino, H. Varum, and J. A. R. M. Silva, “Seismic Vulnerability Assessment, Damage Scenarios and Loss Estimation: Case Study of The Old City Centre of Coimbra, Portugal.†The 14th World Conference on Earthquake Engineering. 2008.

L. Roslan, R. Ahmadi, K.K.F. Lau, L.T. Trinh and M. Rosyadi “Risk-assessment of hydropower plant susceptible to seismic hazard by 3D spectrum analysis.†3rd International Conference on Civil Engineering and Architecture (ICCEA 2020) IOP Proceeding. 2020.

F. Mulargia, P. B. Stark, and R. J. Geller, “Why is Probabilistic Seismic Hazard Analysis (PSHA) still used?†Physics of the Earth and Planetary Interiors, vol. 264, pp. 63–75, 2017.

S. Firat, N. S. Isik, H. Arman, M. Demir, and I. Vural, “Investigation of the soil amplification factor in the Adapazari region.†Bulletin of Engineering Geology and the Environment, vol.75, pp. 141-152, 2016.

J. W. Pappin, P. H. I. Yim, and C. H. R. Koo, “An approach for seismic design in Malaysia following the principles of Eurocode 8.†Bulletin Jurutera, pp. 22–28, 2011.

Malaysia National Annex to MS EN 1998-1: 2015, Eurocode 8: Design of structures for earthquake resistance - Part 1: General rules, seismic actions and rules for buildings. Department of Standard Malaysia, 2017.

F. M. Nazri, C. G. Tan, and M.A. Rashid, “Investigation of Shear Wave Velocity by using Multi-Channel Analysis of Surface Wave Method for Microzonation Map Development and its Application to Industrial Frame Structuresâ€. Soil Mechanics and Foundation Engineering, 55(2), 110–114, 2018

A. Marto, C. S. Tan, F. Kassim, and N.Z. Yunus, “Seismic impact in Peninsular Malaysia.†The 5th International Geotechnical Symposium-Incheon, 2013. pp. 237–242.

R. B. Ahmadi, I.A. Najar, A. F. Abdullahi, N. M. Sa’don, H. Hamza, and N. A. Najar, “Computational Investigation of Soil Liquefaction Susceptibility Based on Standard Penetration Test Value of Miri district (Sarawak, Malaysia)â€. International Journal of Advanced Science and Technology, 29(7), pp. 2732-2742, 2020

D. Basu, and A. Dey “1D Nonlinear Ground Response Analysis of Soils in IIT Guwahati and Liquefaction potential Identification.†16th World Conference on Earthquake Engineering, January 2017, pp. 1–12. 2017

H. Sana, S.K. Nath, and K.S. Gujral, “Site Response Analysis of the Kashmir valley during the 8 October 2005 Kashmir Earthquake (Mw 7.6) using a Geotechnical Datasetâ€. Bulletin of Engineering Geology and the Environment, 78(4), pp. 2551–2563, 2019

S. S. Kumar, A. Dey, and A. M. Krishna, “Importance of Site-Specific Dynamic Soil Properties for Seismic Ground Response Studies.†International Journal of Geotechnical Earthquake Engineering, vol. 9(1), pp. 78–98, 2018.

C. C. Tsai, and H.W. Liu, “Site Response Analysis of Vertical Ground Motion in Consideration of Soil Non-linearityâ€. Soil Dynamics and Earthquake Engineering, 102(2), pp.124–136, 2017

K. Afshari, and J. P. Stewart, “Insights from California Vertical Arrays on the Effectiveness of Ground Response Analysis with Alternative Damping Modelsâ€. Bulletin of the Seismological Society of America, 109(4), pp. 1250–1264, 2019.

T. D. Ancheta, Y. Bozorgnia, R. Darragh, W. J. Silva, B. Chiou, J. P. Stewart, D. M. Boore, R. Graves, N. A. Abrahamson, K. W. Campbell, I. M. Idriss, R. R. Youngs, and G. M. Atkinson, “PEER NGA-West2 Database : A Database of Ground Motions Recorded in Shallow Crustal Earthquakes in Active Tectonic.†15th World Conference on Earthquake Engineering, 2012.

N. A. Bakar, K. C. Ghee, N. A. Safiee, and N. N. N. Daud “Effect of Flexible Soil in Seismic Hazard Assessment for Structural Design in Kuala Lumpur.†Interrnational Journal of Geotechnical Earthquake Engineering. vol. 10. pp. 30- 40, 2019.

P. K. Dammala, A. M. Krishna, S. Bhattacharya, G. Nikitas, and M. Rouholamin, “Dynamic soil properties for seismic ground response studies in Northeastern India.†Soil Dynamics and Earthquake Engineering, vol. 100, pp. 357–370, 2017.

H. H. Tsang, J. L. Wilson, N. T. K. Lam, and R. K. L. Su, “A Design Spectrum Model for Flexible Soil Sites in Regions of Low-to-Moderate Seismicityâ€. Soil Dynamics and Earthquake Engineering 92: 36-45, 2017

V. W. Lee, and M. D. Trifunac, “Should average shear-wave velocity in the top 30m of soil be used to describe seismic amplification?†Soil Dynamics and Earthquake Engineering, vol. 30(11), pp. 1250–1258, 2010.

N. S. H. Harith, F. Tongkul, A. Adnan, and A. V. Shoushtari “Seismic hazard analysis for East Malaysia based on a proposed ground motion prediction equation†IOP Conf. Series: Materials Science and Engineering, 615, 2019.

S. S. Kumar, A. M. Krishna, and A. Dey, “Dynamic properties and liquefaction behaviour of cohesive soil in northeast India under staged cyclic loading.†Journal of Rock Mechanics and Geotechnical Engineering, vol 10(5), pp. 958–967, 2018.

S. A. Esha, A. S. M. F. Hossain, M. A. Habib, M. B. Hossain, and M. A. N. Islam, “Earthquake Ground Response Analysis of Banasree Residential Area Using SHAKE 2000†Proceedings of the 4th International Conference on Civil Engineering for Sustainable Development (ICCESD 2018), 9-11 February 2018

G. Babayev, and L. Telesca, “Site specific ground motion modeling and seismic response analysis for microzonation of Baku, Azerbaijan.†Acta Geophysica, vol. 64(6), pp. 2151–2170, 2016.

I. M. Idriss and R. W. Boulanger, “Semi-empirical procedures for evaluating liquefaction potential during earthquakes.†Soil Dyn Earthq Eng vol. 26, pp. 115–130, 2006

H. Javdanian, “Evaluation of soil liquefaction potential using energy approach: experimental and statistical investigationâ€. Bulletin of Engineering Geology and the Environment, 78(3), pp. 1697-1708, 2019

S. Sengupta and S. Kolathayar, “Evalauation of Liquefaction Potential of Soil at Power Plant Site in Chittagong, Bangladesh†International Journal of Geotechnical Earthquake Engineering. Vol. 11, Issue 1, January-June 2020

Z. Lamat, Y. Jamian, and M. A. A. Eskandar. “Site Specific Ground Response Spectra of Bakun.†Pertanika J. Sci. & Technol. vol. 25 (S), pp. 23 – 28, 2017.

Y. M. A. Hashash, M. I. Musgrove, J. A. Harmon, D. R. Groholski, C. A. Philips and D. Park, “DEEPSOIL 6.1, User Manual. Urbana, IL: Board of Trustees of University of Illinois at Urbana-Campaign. 2016




DOI: http://dx.doi.org/10.18517/ijaseit.11.4.12281

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