DOI: https://doi.org/10.9744/ced.21.2.97-106

Seismic Vulnerability Maps of Ratu Agung District, Bengkulu City, Indonesia

Lindung Zalbuin Mase

Abstract


During the 8.6 Mw Bengkulu-Mentawai Earthquake Ratu Agung District was identified as an impacted area. This paper aims to deliver the seismic vulnerability based on geophysical observation. This study was initiated by performing the ambient noise measurement to obtain the geophysical characteristic, such as amplification and predominant frequency. Furthermore, the vulnerability index analysis was performed from the geophysical information collected from the investigation. To observe the tendency of ground damage during the earthquake, ground damages analysis is also performed. All results are depicted into the microzonation maps. The results showed that the amplification and predominant frequency on site are generally ranging from 3 to 5 and 5 to 8 Hz, respectively. The seismic vulnerability index in study area is up to 10-3. The results showed that during the Bengkulu-Mentawai Earthquake, the investigated sites could be possible to undergo crack settlement which can trigger massive sand boiling in the study area.

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References


  1. Mase, L.Z., One Dimensional Site Response Analysis of Liquefaction Potential along Coastal Area of Bengkulu City, Indonesia, Civil Engineering Dimension, 20(2), 2018, pp. 57-69.

  2. Mase, L.Z., Reliability Study of Spectral Acceleration Designs Against Earthquakes in Bengkulu City, Indonesia, International Journal of Technology, 9(5), 2018, 910-924.

  3. Farid, M. and Hadi, A.I., Measurement of Shear Strain in Map Liquefaction Area for Earthquake Mitigation in Bengkulu City, Telkomnika, 16(4), 2018, pp. 1597-1606.

  4. Refrizon, Hadi, A.I., Lestari, K., and Octari, T., Analysis of Peak Ground Acceleration and Seismic Vulnerability in Ratu Agung Bengkulu City, In: Proceeding of Semirata FMIPA UNILA, Lampung, 10-12 May, 2013, Indonesia (in Indo-nesian)

  5. Mase, L.Z., Earthquake Characteristic in Bengkulu City, Teknosia, 2(15), 2015, pp. 25-34. (in Indonesian).

  6. Mase, L.Z., and Somantri, A.K., Liquefaction Potential Analysis in Lempuing Sub-District Based on the Critical Peak Ground Acceleration, Potensi, 25(1), 2016, pp. 1-11.

  7. Mase, L.Z., Liquefaction Potential Analysis Along Coastal Area of Bengkulu Province due to the 2007 Mw 8.6 Bengkulu Earthquake, Journal of Engineering and Technological Sciences, 49(6), 2017, pp. 721-736.

  8. Hausler, E. and Anderson, A., Observation of the 12 and 13 September 2007 Earthquake, Sumatra, Indonesia. Build Change Report, Denver, Colorado, USA, 2007.

  9. Lachet, C., Hatzfeld, D., Bard, P. Y., Theodulidis, N., Papaioannou, C., and Savvaidis, A., Site Effects and Microzonation in the City of Thessaloniki (Greece) Comparison of Different Approaches, Bulletin of the Seismological Society of America, 86(6), 1996, pp.1692-1703.

  10. El-Hady, S., Fergany, E.A.A., Othman, A., and Mohamed, G.E.A., Seismic Microzonation of Marsa Alam, Egypt using Inversion HVSR of Microtremor Observations, Journal of Seismology, 16(1), 2012, pp. 55-66.

  11. Mase, L.Z., Likitlersuang, S., Tobita, T., Chaiprakaikeow, S., and Soralump, S., Local Site Investigation of Liquefied Soils Caused by Earthquake in Northern Thailand, Journal of Earthquake Engineering, 2018, pp.1-24. (online first)

  12. Kanai, K. and T. Tanaka., Measurement of the Microtremor, Bulletin of Earthquake Research Institute, 32(1), 1954, pp. 199–209.

  13. Nakamura, Y., A Method for Dynamic Characteristics Estimation of Subsurface using Microtremor on the Ground Surface, Railway Technical Research Institute: Quarterly Reports, 30(1), 1989, pp. 25-33.

  14. Atakan, K, The Need for Standardized Approach for Estimating the Local Site Effects based on Ambient Noise Recordings, In: Mucciarelli, M, Herak, M, Cassidy, J.F., Editors, Proceeding of the NATO Advanced Research Workshop on Increasing Seismic Safety by Combining Engineering Technologies and Seismological Data, Dubrovnik, Croatia 19–21 September 2007: The NATO Science for Peace and Security Series-C: Environmental Security, XVIII. pp 3-15, 2009.

  15. Lachet, C. and Bard, P.Y., Numerical and Theoretical Investigations on the Possibilities and Limitations of Nakamura's Technique, Physics of the Earth, 42(1), 1994, pp. 377–397.

  16. Koçkar, M.K. and Akgün, H. (2012), Evaluation of the Site Effects of the Ankara Basin, Turkey, Journal of Applied Geophysics, 83(1), 2012, pp. 120-134.

  17. Bonnefoy-Claudet, S., Cornou, C., Bard, P.Y., Cotton, F., Moczo, P., Kristek, J., and Fah, D., H/V ratio: A Tool for Site Effects Evaluation, Results from 1-D Noise Simulations, Geophysical Journal International, 167(2), 2006, pp. 827–837.

  18. Raptakis, D.G., Manakou, M.V., Chavez-Garcia, F.J., Makra, K.A., and Pitilakis, K.D., 3D Configuration of Mygdonian Basin and Preliminary Estimate of its Site Response, Soil Dynamics and Earthquake Engineering, 25(1), 2005, pp. 871–887.

  19. Nakamura, Y., Seismic Vulnerability Indices for Ground and Structures using Microtremor, In: Proceeding of World Congress on Railway Research in Florence, Italy, 16-19 November, 1997. pp. 1-7.

  20. Ishihara, K., Introduction to Dynamic Soil Mechanism, University of Tokyo, 1978. (in Japanese)

  21. Kanai, K., and Tanaka, T., On Microtremor VIII, Bulletin of the Earthquake Research Institute, University of Tokyo, 39(1), 1961, pp. 97-114.

  22. SESAME., Guidelines for the Implementation of H/V Spectral Ratio Technique on Ambient Vibrations: Measurements, Processing, and Interpretations, European Commission – Research General Directorate Project No. EVG1-CT-2000-00026, SESAME, 2004.

  23. Gosar, A., Study on the Applicability of the Microtremor HVSR Method to Support Seismic Microzonation in the Town of Idrija (W Slovenia). Natural Hazards and Earth System Sciences, 17(6), 2017, pp. 925-937.

  24. Gosar, A., Site Effects and Soil-Structure Resonance Study in the Kobarid Basin (NW Slovenia) using Microtremors, Natural Hazards and Earth System Sciences, 10(4), 2010, pp.761-772.

  25. Choobasti, A.J., Naghizadehrokni, M., and Rezaei, S., Liquefation Assesment by Microtremor Measurements in Babol City, the 5th International Conference on Geotechnique, Construction Materials, and Environmental, Osaka, Japan, 16-18 Nov, 2015.

  26. Huang, H.C. and Tseng, Y.S., Characteristic of Soil Liquefaction using H/V of Microtremors in Yuanlin Area, Taiwan, Terrestrial, Atmospheric, and Oceanic (TAO) Science Journal, 13(3), 2002, pp. 325-338.
  27. Kramer, S.L., Geotechnical Earthquake Engineering, Prentice Hall, New Jersey, USA, 1996.

  28. Soralump, S., and Feungaugsorn, J., Probabilistic Analysis of Liquefaction Potential: The First Eyewitness Case in Thailand, In: the 18th National Convention of Civil Engineering, Chiang Mai, Thailand, 8-10 May, 2013, pp. 301-307.

  29. Lukkunaprasit, P., Ruangrassamee, A., Boonyatee, T., Chintanapakdee, C., Jankaew, K., Thanasisathit, N., and Chandrangsu, T., Performances of Structures in the Mw 6.1 Mae Lao Earthquake in Thailand on May 5, 2014 and Implication for Future Construction, Earthquake Engineering, 20(2), 2016, pp. 219-242.

  30. Castro, G., Empirical Methods in Liquefaction Evaluation, Proceedings of the 1st Annual Leonardo Zeevaert International Conference, Mexico City, Mexico, November, 1985. pp. 1-41.

  31. Castro, G., On the Behavior of Soils during Earthquakes–Liquefaction, Developments in Geotechnical Engineering, 42(1), 1987, pp. 169-204.





DOI: https://doi.org/10.9744/ced.21.2.97-106



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