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All Journal Journal of Engineering and Technological Sciences Simposium II UNIID 2017 Inersia : Jurnal Teknik Sipil
I Wayan Sengara
Institut Teknologi Bandung
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering

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PEMILIHAN BENTUK MODEL PENILAIAN RISIKO BENCANA GEMPA BUMI UNTUK RUAS JALAN NASIONAL DI INDONESIA Mona Foralisa Toyfur; Krishna S. Pribadi; Sony S. Wibowo; I Wayan Sengara
Simposium II UNIID 2017 Vol 2 (2017)
Publisher : Simposium II UNIID 2017

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (358.276 KB)

Abstract

Indonesia merupakan negara yang sangat rawan terhadap bencana alam. Bencana alam banjir, gempa bumi, longsor, gempa bumi, dan tsunami merupakan bencana alam yang banyak berpengaruh terhadap jalan dan jembatan di Indonesia. Gempa bumi merupakan bencana yang kejadiannya sulit diprediksi, tetapi dampak merusak gempa bumi sangat besar dibanding dengan bencana banjir yang selalu terjadi secara periodik. Pemerintah Indonesia belum memiliki manajemen risiko bencana alam yang menyeluruh untuk ruas jalan, terutama tahap mitigasi. Pada saat ini baru tersedia dan diterapkan pedoman untuk tahap tanggap darurat (setelah terjadi bencana). Pada saat ini telah berkembang model penilaian kuantitatif, kualitatif dan semi kuantitatif sebagai alat untuk menilai risiko bencana. Pemilihan bentuk model penilaian yang tepat sangat penting berkaitan dengan keluaran yang diharapkan. Masing-masing bentuk model penilaian memiliki kebutuhan masukan jumlah dan ketelitian/akurasi data. Penelitian ini bertujuan untuk memilih model penilaian risiko bencana gempa bumi untuk ruas jalan nasional. Metodologi yang digunakan adalah dengan studi literatur dan pengambilan data primer dengan wawancara. Hasil studi literatur dan pengamatan lapangan memperlihatkan bahwa model penilaian semi kuantitatif merupakan model yang paling cocok digunakan untuk Indonesia
Development of Risk Coefficient for Input to New Indonesian Seismic Building Codes I Wayan Sengara; Indra Djati Sidhi; Andri Mulia; Muhammad Asrurifak; Daniel Hutabarat
Journal of Engineering and Technological Sciences Vol. 48 No. 1 (2016)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2016.48.1.5

Abstract

In 2010 a national team (Team 9) developed the hazard curve and maximum considered earthquake (MCE) for the whole Indonesian area. The results were further applied in this study. Risk-targeted ground motions (RTGM) with 1% probability of building collapse in 50 years were developed by integrating the hazard curve with the structural capacity distribution. Parametric study on various variables that affect the log-normal standard deviation suggests a value of 0.7. In the effort to obtain the RTGM for the whole Indonesian region, integration was carried out using definite integration in which the curves are split into thin vertical strips and the areas below each curve are multiplied and summed. Detailed procedures and verification are given in this paper. An example of RTGM calculation was carried out for Jakarta City and then applied to the whole Indonesian region. Risk coefficients defining the ratio between RTGM and MCE were eventually developed and mapped. Risk coefficient development was generated for two periods of interest, i.e. a short time period (T = 0.2 seconds) and a 1-second period, respectively. Based on the results, for the period of 1.0 seconds 55% of Indonesian cities/districts have a risk coefficient in the range of 0.9 to 1.1 and about 37% in the range of 0.7 to 0.9, with only 5% in the range of 1.1 to 1.25.
ANALISIS POTENSI LIKUIFAKSI DENGAN PENDEKATAN PROBABILISTIK (PERFORMANCE-BASED EVALUATION) DI KOTA PADANG, SUMATERA BARAT Rena Misliniyati; FX Toha; I Wayan Sengara
Inersia: Jurnal Teknik Sipil Vol 4, No 2 (2012)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1250.191 KB) | DOI: 10.33369/ijts.4.2.13-24

Abstract

Evaluation of liquefaction potential by the conventional way are based on deterministic methods. The methods use only one condition of earthquake load as parameter in liquefaction analysis. Actually, the strength of earthquake loads are varies. In the other words, there is the uncertainty magnitude of earthquake loading. The uncertainty can be taken into analysis only by using a probabilistic approach. This study describes how to analyze liquefaction by probabilistic method. The method used was performance-based evaluation, developed byKramer and Mayfield (2005, 2007). This method include contributions from all levels of magnitude earthquake (hazard levels) in liquefaction analysis. The research location is in Padang, West Sumatra. Soil Investigation data used are N-SPT and shear wave velocity spread in the city of Padang. Earthquake load parameters used were obtained from PSHA and deagregation analysis. The results of this study show the variation of liquefaction potential across the city of Padang based on liquefaction return period. The location with great potentialfor liquefaction (FS <1) by the probability more than 50% were in the coastal region and northern parts of Padang.
Co-Authors Andri Mulia Daniel Hutabarat FX Toha Indra Djati Sidhi Krishna S. Pribadi Muhammad Asrurifak Rena Misliniyati Sony S. Wibowo Toyfur, Mona Foralisa