UPDATING OF SURAKARTA SEISMIC SITE CLASS MAP BASED ON STANDARD PENETRTION TEST

Yusep Muslih Purwana, Raden Harya Dananjaya, Yusuf Cahyo Nogroho

Abstract

Surakarta is one of the cities in Java island with a high population growth rate, triggering the increase in the construction, especially for high-rise buildings. The city is close to several earthquake sources, causing a high level of seismic hazard. One of the main parameters of earthquake resistant building design is the value of peak ground acceleration at surface level. It is obtained by multiplying the peak ground acceleration in the bedrock by a multiplier factor that depends on the site class conditions of the location. A previous study has been conducted in 2015 using 32 boreholes indicating that around 19.5% of Surakarta area is classified as SC (hard soil), and 80.5% of the rest is SD (medium soil). To increase the accuracy, another 31 additional boreholes data are adopted. The new result shows that Surakarta is divided into three different seismic site class. Around 4.80% the area is classified as SC (hard soil), 94.50% is SD (medium soil), and 0,70% is SE (soft soil). The southern part of Surakarta has a higher level of vulnerability to earthquakes, especially in the border area between Banjarsari, Laweyan, and Serengan subdistricts which have a SE (soft soil) seismic site class.

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References

Aldiamar, F., dkk. (2013). “Kajian Awal Kelas Situs untuk Perencanaan Ketahanan Gempa Struktur Bangunan Gedung di DKI Jakarta”. Jurnal Permukiman, Volume 8, Halaman 108-114.

American Society of Civil Engineers (ASCE). (2010). Minimum Design Loads for Buildings and Other Structures. American Seciety of Civil Engineers, No. 7, ISBN 978-0-7844-1115-5.

Asrurifak, M. dkk. (2013). “Pengembangan Peta Klasifikasi Tanah dan Kedalaman Batuan Dasar untuk Menunjang Pembuatan Peta Mikrozonasi Jakarta dengan Menggunakan Mikrotremor Array”. HATTI 17th Annual Scientific Meeting, Halaman 67-72.

Badan Standardisasi Nasional. (2008). Cara Uji Penetrasi Lapangan dengan SPT. SNI 4153:2008, Jakarta.

Badan Standardisasi Nasional. (2012). Tata Cara Perencanaan Ketahanan Gempa untuk Bangunan Gedung dan Non Gedung. SNI 1726:2012, Jakarta.

Imai, T., & Tenouchi, K. (1982). “Correlation of N-value with S-Wave Velocity and Shear Modulus”. Second Europe Symposium on Penetration Testing, Amsterdam: The Netherlands, Page 67-72.

Jananda, A. S., dkk. (2014). “Pengembangan Peta Kecepatan elombang Geser dan Peta Tahanan Penetrasi Standar di Semarang”. JURNAL KARYA TEKNIK SIPIL, Volume 3, Halaman 167-176.

Kurniawan, M. F., Koesuma, S., Legowo, B. (2019). “Vs30 Mapping and Site Classification in Surakarta City Based on Multichannel Analysis of Surface Waves Method”. Jurnal of Physiscs: Conference Series, Volume 1204, Conference 1.

Kramer, S., L. (1996). Geotechnical Earthquake Engineering. Prentice Hall, New Jersey.

Ohta, Y., & Goto, N. (1978). “Empirical Shear Wave Velocity Equation in Terms of Characteristic Soil Indexes”. Earthquake Engineering and Structural Dynamic, Volume 6, Page 167-187.

Purwana, Y. M., Saido, A. P., Maula, M. A. (2005). “Mapping of hard soil surface of surakarta based on CPT”. 3th International Conference of Geotechnical Engineering, Semarang, 3-4 Agustus 2005.

Sa’adah, U., Purwana, Y. M., Djarwanti, N. (2015). “Analisis risiko Gempa di Kota Surakarta dengan Pendekatan Metode Gumbel”. e-Jurnal MATRIKS TEKNIK SIPIL, Maret 2015, Halaman 30-35.

Warman, R. S., Purwana Y. M., Djarwanti, N. (2015). “The Study on Determination of Seismic Site Class Map of Surakarta”. 10th Indonesian Geotechnical Conference and 19th Annual Scientific Meeting, Jakarta, 14-25 November 2015, Page 207-212.

Warman, R. S., Purwana, Y. M., Djarwanti, N. (2016).”Profil Permukaan Tanah Keras Kota Surakarta Sebagai Informasi Pradesain Pondasi”. e-Jurnal MATRIKS TEKNIK SIPIL, Maret 2016, Halaman 83-91.

DOI: https://doi.org/10.20961/jrrs.v3i2.41085

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