Memanajemen suatu perkerasan jalan, khususnya untuk mendeteksi kekuatannya pada saat ini, menganalisis degradasi kekakuan bahan perkerasan dan mempredisksi umur sisa bagi tahun-tahun mendatang; diperlukan suatu teknologi yang cepat, akurat dan inovatif. Kebutuhan ini juga dikarenakan faktor teknis lainnya yaitu, jaringan jalan yang luas dan terbatasnya anggaran pemeliharaan jalan. Teknologi konvensional yang bersifat merusak (Destructive Testing) dirasakan tidak lagi tepat karena dari segi biaya menjadi sangat mahal dan nilai kepraktisannya menjadi rendah. Khususnya, ketika insinyur perkerasan jalan harus menilai kekuatan tanah dasar suatu konstruksi perkerasan jalan. Kesulitan yang timbul adalah, haruskah menilai kekuatan tanah dasar dengan harus membongkar struktur perkerasan jalan di atasnya ? jika jalan itu panjang, akankah sampling itu efektif sedangkan kondisi tanah di Indonesia lebih banyak variasinya (heterogen).

Studi yang kami lakukan selama tahun 2006 – 2009, telah mengusulkan suatu teknik yang disebut Wavelet Spectrogram Analysis of Surface Wave Technique. Teknik ini merupakan pengembangan teknik SASW dengan berbagai modifikasi dan peningkatan kemampuan analisisnya sehingga bisa menampilkan dua parameter penting dalam kajian dinamik tanah dasar yaitu modulus geser dan rasio pelemahan (damping). Kedua parameter ini sangat penting untuk memodelkan perilaku kekuatan bahan dari berbagai level regangan. Khusus untuk perkerasan, respon material (tanah dasar) setiap regangan yang timbul akibat beban yang bervariasi dapat dimonitor dengan baik.

Untuk mendalami lebih lanjut mengenai bahan ini, silahkan membaca referensi kami di:

Sri Atmaja P. Rosyidi and Mohd. Raihan Taha (2011). Wavelet Spectrogram Analysis of Surface Wave Technique for Dynamic Soil Properties Measurement on Soft Marine Clay Site, Seismic Waves – Research and Analysis, Masaki Kanao (Ed.), ISBN: 978-953-307-944-8, InTech, Available from: http://www.intechopen.com/articles/show/title/wavelet-spectrogram-analysis-of-surface-wave-technique-for-dynamic-soil-properties-measurement-on-so

atau akses link berikut ini: CHAPTER WEB,  FULL PAPER-PDF

Untuk mendukung kelancaran transportasi kereta api, diperlukan prasarana jalan kereta api yang aman secara teknis. Buku ini berisi dasar-dasar perencanaan dan perancangan serta perkembangan teknologi di bidang prasarana jalan rel.  Kebutuhan pembekalan dasar-dasar transportasi jalan rel ini diharapkan dapat meningkatkan wawasan keilmuan dan teknologi bidang transportasi kereta api serta penguasaan berbagai bagian perencanaan yang diperlukan dalam pembangunan suatu jalan rel.  Buku ini masih terfokus pada perencanaan prasarana jalan rel di Indonesia sehingga panduan perencanaan mengacu kepada Peraturan Dinas No.10 tahun 1986 yang diterbitkan oleh PT. Kereta Api, Indonesia.

Buku ini merupakan pengembangan dari modul (buku ajar) perkuliahan yang diterbitkan secara terbatas di Universitas Muhammadiyah Yogyakarta pada mata kuliah prasarana transportasi.  Dengan dipublikasikan secara meluas bagi masyarakat diharapkan buku ini bisa memberikan manfaat dalam pengembangan teknik transportasi di Indonesia serta buku ini dapat dikontribusikan secara lebih menyeluruh sebagai sarana saling bertukar pikiran dalam ilmu pengetahuan dan teknologi.

Kerusakan lingkungan misalnya kekeringan, pemanasan global (efek rumah kaca) dan berbagai bencana yang ditimbulkan akhir-akhir ini seperti bencana banjir, longsor, dan lain sebagainya, adalah disebabkan oleh perilaku manusia dalam penebangan pohon tanpa penanaman kembali, pemakaian energi yang terlalu boros, pengelolaan dan penggunaan air bersih yang berlebihan, pengolahan sampah yang tidak benar, meningkatnya sampah plastik dan penggunaan bahan kertas yang berlebihan. Untuk itu sebagai bentuk kepedulian terhadap lingkungan maka Universitas Muhammadiyah Yogyakarta telah mencanangkan program yaitu menuju kampus hijau atau Go Green Kampus.

Program Go Green Campus UMY, terdiri dari 5 program:

1. Penghijauan dan kebersihan kampus.
2. Penghematan energi (efisiensi energi) dan air bersih.
3. Efisiensi penggunaan kertas.
4. Pengelolaan sampah secara optimal.
5. Penggunaan bahan-bahan daur ulang.

Program ini mulai dicanangkan pada tahun ini dan melibatkan semua civitas akademika UMY. “Untuk mewujudkan program Go Green ini harus kita mulai dari pihak internal kita sendiri dimana semua pihak civitas akademika UMY seperti unit kegiatan mahasiswa, dosen, karyawan dan pejabat struktural kampus UMY ikut dalam program ini” .

Penghijauan (penanaman bibit tanaman di UMY), juga dilakukan penghijauan di luar kampus yaitu di beberapa desa binaan UMY di DIY, dan juga melakukan pengembangan laboratorium pertanian terpadu di Brosot Kulonprogo. Program ini diharapkan juga akan memberikan dampak positif bagi kegiatan akademik di kampus. Dengan semakin hijau dan asrinya lingkungan kampus maka mahasiswa juga menjadi lebih nyaman dan fokus mengikuti kegiatan akademik di kampus, serta meningkatkan aktivitas penelitian khususnya untuk pelestarian lingkungan.

Sumber foto: www.umy.ac.id

Pengumuman Akademik

Kepada Mahasiswa/Mahasiswi yang mengambil MK. Perencanaan Transportasi CEC 716 di Jurusan Teknik Sipil UMY. Bahwa, jawaban ujian akhir semester (UAS) telah ditempel pada papan pengumuman di JTS UMY. File (softcopy) juga bisa diunduh melalui :

Klik ini : JAWABAN UJIAN AKHIR SEMESTER PT_CEC 716_2011/2012

atau copy and paste link berikut ini:

http://www.box.com/s/nhu7csqlt065gmurja2h

Terima kasih.

Earthquake Impacts of the Mw 7.6, Padang, Indonesia, 30 September 2009 (Kesan Gempa 7.6 Mw Padang Indonesia, 30 September 2009)

Sri Atmaja P. Rosyidi, Tajul Anuar Jamaluddin, Lim Choun Sian & Mohd. Raihan Taha

ABSTRACT

The earthquake of 30 September 2009, 7.6 MW that strucked the city of Padang, Padang Pariaman and nearby areas in West Sumatra, Indonesia, killed more than 1200 people. Thousands of damaged houses, buildings and infrastructure have been reported with low to severe damage level. This research reports the effect of the Padang earthquake in terms of building damages and landslides that occurred in the city of Padang, Padang Pariaman, Pariaman and Agam. Analysis on earthquake effects was carried out based on the geology, geotechnical, building damages and geohazards data collected from various sources and field works in affected areas. Results from field work showed that damages on the building structures in Padang and Padang Pariaman was due to the quality of construction which did not meet the building code and standard requirements, and the effect of geological conditions, i.e., ground amplification on deep layer of alluvial deposit. Some observed damage in the buildings were related to the building location constructed on the fault lines and soil or rock layers discontinuity.  From the site visit, it was found that landslide cases which occurred in Pariaman and Agam after the earthquake were caused by the topography, geomorphology of area and steep slopes. Further studies should be carried out for hazard risks identification and assessment in order to prepare for future earthquakes.

Keywords: Geohazard; geology, ground amplification; landslide, Padang earthquake

Published:  Sains Malaysiana Journal (ISSN: 0126-6039), Vol 40, Number 12, December 2011,pp. 1393-1405

SAINS MALAYSIANA is indexed and abstracted in ISI Thomson Reuters (Science Citation Index Expanded/SciSearch®, Journal Citation Reports/Science Edition), SCOPUS, Chemical Abstracts, Google-Scholar, MyAis and Zentralblatt MATH. The Impact Factor – JCR/SE 2010 is 0.152.

Link: Abstract and References I Full Text PDF (9.0 MB) I

Call for Papers

Conference Announcement and Call for Papers on Sustainable Innovation for Enhancing Global Competitiveness in Asian Countries 

International Conference on Sustainable Innovation (ICoSi 2012) and 3^rd International Joint- Seminar (IJS 2012)

19-21 March 2012, Universitas Muhammadiyah Yogyakarta, Indonesia

Background

The era of globalization beginning from the second half of the twentieth century is largely characterized by tremendous changes in physical appearance of human achievements, and these changes evidently remain continue. This is especially demonstrated by breakthroughs in science and technology which constitute a backbone of the modern civilization. While rapid progress of technology gives impetus to vast industrialization that significantly contributes to economic growth of a country, the focus on the short-term economic growth has led to the world’s malaises such as macroeconomic imbalances; moral decadence, family breakthrough; growing inequality and environmental destruction.

To overcome the problems, mutual understanding among nations and countries, and thus among civilizations must be developed by considering inner capacity of every localities and developing the world based on ethical values. Regional consideration in terms of cultural differences, political platform of a country, economic achievements, environmental resources, social capital and the like obtain significance in the regard.

Asian countries can take productive roles as they have shifted from just a home of cheap labor and programming skills to a powerhouse of economic growth generated by innovation in technology. The venture is how Asian countries wisely gear those opportunities to the design and implementation of more sound and sustainable innovation to elevate the Asian countries’ competitive advantages.

Conference Themes

The main theme of the conference is “Sustainable innovation for Enhancing Global Competitiveness in Asian Countries”.

The conference welcomes conceptual and research-based papers related to the following sub-themes:

1. Enhancement of innovative and effective government in cross cultural and religious perspective
2. Policy innovation, mass media, educational and legal governance issues
3. Roles of technology in supporting good governance
4. Energy conservation in information technology
5. Sustainable and conservation issues in built environment
6. Innovation is Islamic economies, banking and financial system
7. Roles of agriculture in food and energy security
8. Trend in agriculture and environment sustainability
9. Enhancing environmental quality in food production
10. Sustainable innovation in health issues
11. Sustainable innovations in disasters management
12. Economic development and sustainability
13. Innovation, growth and sustainability
14. Learning, capability building and innovation
15. Innovation studies and sustainability
16. Transnational knowledge, technology and governance networks and sustainable innovation

Submission details

There will be two tracks for abstract submissions; papers and posters. Abstracts should be maximum 500 words and must be submitted online via the conference website: http://icosi.umy.ac.id/online-submission  latest by 30 November 2011. Acceptance of all abstracts will be based on relevance for sustainable innovation issues stated in the conference themes, originality and overall quality. Final acceptance of abstract will be communicated by 1 December 2011 via email.

Full papers of 3000-9000 words (maximum) are to be submitted latest by 31 December 2011 (Submission directly in full paper version is accepted although the abstract has not been submitted). Acceptance full paper notification will be informed by 31January 2012.

Click here to see the Paper guideline and structure

Important dates

1. Call for papers,  15 September 2011
2. Abstract submission deadline,   30 November 2011
3. Acceptance of abstract notification , 1 December 2011
4. Full paper submission deadline, 31 December 2011 ((Submission directly in full paper version is accepted although the abstract has not been submitted)
5. Acceptance of full paper notification,  31 January 2012

Detail information, please visit: http://icosi.umy.ac.id/call-for-papers

Soil liquefaction potential is one of main problems in non-compacted granular soil deposit due to dynamic excitation caused by earthquake or other huge dynamic sources. This offered research is to continue the work from previous research for developing the 2-D and 3-D tomography technique in soil liquefaction potential mapping based on the shear wave velocity measurements. Duration of research work is 2 years, where the location of study is in Indonesia (selected provinces and sites). Funding of this research is still proposed to national agencies.

I would like to invite the researchers and scientists in this such area to join and participate in the research. Please do not hesitate to contact me (email) at atmaja[dot]sri[at]gmail[dot]com. Thank you!

Previous research: FAULT AND LIQUEFACTION ASSESSMENT USING GEO-RESISTIVITY AND SEISMIC TECHNIQUE

The earthquake of 6.3 MW scales in Yogyakarta on May 27, 2006 caused widespread destruction to the heavily populated and relatively prosperous region. In the case of geotechnical damages, ground surface cracks, permanent displacement landslides and liquefactions were a mostly ground failure events observed. Liquefaction triggered by the Yogyakarta earthquake in which liquefied sediments were ejected through ground fissures during the earthquake were also found in certain locations. In several areas, the building foundations were severely affected by ground deformation.  Housing units built on the hillside were heavily damaged or totally collapsed due to ground failure. Almost all geotechnical damages occurred not only near the main fault in Yogyakarta (known as Opak fault) but also existed on surface of other underground faults. The underground faults have been difficult to identify due to the limited information from geological maps and deeper soil profiles. In order to observe the underground faults cross section in the geotechnical damage area and liquefaction potential map, integrated soil investigation, geo-electric resistivity (electrical resistivity sounding) and seismic measurements were conducted in selected area. The discontinuity of soil layers in fault locations were clearly found in the sub-surface depth around 6 to 30 m. It was also found that local liquefaction were found in several sites in which the water table was relatively shallow and close to the fault lines. Ground settlements and horizontal displacement were also observed in several sites where signs of liquefaction were found nearby. Liquefaction potential was observed by seismic measurement, laboratory and SPT tests. The result showed that the severe building damage were close to the fault lines where the local liquefaction and soil boiling were recognized as well.

TOPIK 1. Analisis likuifaksi dan penurunan tanah 2-D untuk daerah deposit rawan bencana berdasarkan kecepatan gelombang geser.

Pembimbing: Sri Atmaja P. Rosyidi, Ph.D.

Likuifaksi merupakan fenomena pencairan tanah yang lazim terjadi pada lokasi tanah deposit pasir tidak padat dengan gradasi yang relatif seragam, akibat meningkatnya Read the rest of this entry »