Hasil Pencarian  ::  Simpan CSV :: Kembali

"Pada tanggal 27 Maret 2009 Bendungan Situ Gintung mengalami keruntuhan. Keruntuhan bendungan Situ Gintung dianalisis berdasarkan kondisi DAS, waduk, dan bendungan pada 27 Maret 2009. Analisis hidrologi dan analisis stabilitas lereng akan dikombinasikan untuk menganalisis penyebab utama keruntuhan gintung. Analisis DAS menggunakan bantuan perangkat lunak ARC-GIS, penelusuran banjir di waduk menggunakan perangkat lunak HEC-HMS, dan analisis stabilitas lereng menggunakan Geo-Slope. Input data, parameter dan asumsi pemodelan sangat berperan penting untuk memperoleh hasil yang tepat. Hasil analisis hidrologi menunjukan bahwa hujan yang terjadi pada 26 Maret 2009 dengan intensitas hujan 111 mm/ hari hanya tergolong kedalam hujan rencana dengan periode 5 tahunan. Hasil penelusuran banjir di waduk menunjukkan, elevasi muka air saat 27 Maret 2009 hanya 70 cm diatas mercu pelimpah atau 1,3 m di bawah tanggul dengan puncak banjir 36,2 m3/s, sehingga tidak menyebabkan overtopping pada tanggul. Hasil analisis stabilitas tubuh bendungan menunjukan bahwa nilai keamanan lereng adalah 1,19 < 1,5 standar, hal tersebut menunjukkan adanya beberapa perlemahan pada urugan tanah di tanggul seperti terjadi pengikisan setempat dan retakan. Dapat disimpulkan faktor utama keruntuhan bendungan di Situ Gintung disebabkan karena terdapat scouring dan retakan pada badan tanggul.

---

On March, 27th 2009 Situ Gintung dam collapsed. Situ Gintung dam failure has been analyzed based on the condition of watershed, reservoir, and embankment on March, 27 2009. Hydrological analysis and slope stability analysis will be combined to analyze the major causes gintung collapse. Watershed analysis using ARC GIS software, routing in reservoir using HEC HMS model, and stability condition was strudied using Geo-Slope. Input data, parameters, and model assumptions are very important to get the right results. Hydrological analysis results show that rain occurred on March 26, 2009 with a rainfall intensity of 111 mm/day was only classified as rainfall with a return period of 5 years. Reservoir routing show that water level elevation on March, 27 2009 was only 70 cm above the spillway crest or 1,3 m below the embankment crest with a peak flow of 36,2 m3/s, so it wasnt cause overtopping of the embankment. Slope stability analysis results show that the factor of safety of 1,19<1,5 standard, it show that there was the weakening of the dam, such as scouring, erosion, and cracks. It can be concluded that the main factor of the collapsed was caused by scouring and cracks."

"Peta Sumber dan Bahaya Gempa Indonesia Tahun 2017 menunjukkan peningkatan pada nilai bahaya percepatan gempa terutama di wilayah sekitar Jakarta. Gempa menghasilkan pergerakan tanah yang unik, maka satu jenis loading protocol pada uji eksperimental tidak dapat menggambarkan variabilitas dari earthquake demand. Dengan mengeneralisasi penggunaan loading protocol pada suatu komponen struktur dapat mengakibatkan misleading dalam menyimpulkan seismic demand-nya. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan loading protocol pada kinerja struktur serta merupakan bagian dari penelitian skala besar terkait seismic performance pada sambungan antara spun pile dengan pile cap di Indonesia. Metode penelitian dilakukan dengan metode elemen hingga nonlinier menggunakan SAP2000 dan OpenSees dengan objek penelitiannya adalah spun pile hollow serta spun pile dengan beton pengisi. Pada spesimen tersebut, loading protocol pembebanan siklik diberikan dalam bentuk drift ratio dengan tipe loading protocol yang memiliki jumlah siklus serta pola kenaikan/penurunan nilai drift ratio yang berbeda. Pada penelitian ini diketahui bahwa tipe loading protocol pembebanan siklik yang berbeda mempengaruhi kinerja struktur dalam segi penurunan kekakuan (stiffness degradation), kekuatan (strength degradation) serta penyerapan energinya dengan trend yang kurang lebih sama. Berdasarkan penelitian ini, tipe loading protocol yang direkomendasikan untuk digunakan dalam mengetahui kinerja struktur secara optimal adalah tipe TP-01 sama dengan panduan pada ACI 364 di mana tipe loading protocol yang disarankan adalah tipe loading protocol dengan pengulangan pembebanan dalam bentuk drift ratio selama beberapa siklus sebelum pembebanan dilanjutkan dengan kenaikan nilai drift ratio selanjutnya. Pada tipe loading protocol TP-01 walaupun jumlah siklusnya cukup banyak akibat pengulangan pembebanan, tetapi penurunan kekuan dan kekuatan yang terjadi tidak terlalu besar dan penyerapan energinya cukup besar jika dibandingkan dengan tipe loading protocol lainnya.

---

There is an increase of hazard value on earthquake acceleration around Jakarta. Earthquake produce unique ground movements, so one type of loading protocol for experimental test cannot determine the variability of earthquake demand. By generalizing the use of loading protocols on a structural component can lead to misleading in fulfilling its seismic demand. This study aims to determine the effect of differences in loading protocols on a structure performance, also this study is also a part of a large-scale research related to seismic performance in the connection between spun pile and pile cap in Indonesia. The research method is carried out by the nonlinear finite element method using SAP2000 and OpenSees with the research object is a spun pile hollow and spun pile with concrete infill. In these specimens, the cyclic loading with loading protocol is given in the form of a drift ratio with several type of loading protocol that has a different number of cycles, drift ratio pattern (increasing/decreasing) and the sequence of the loading protocol. Based on this research, it is known that different type of loading protocols affects the structure performance in terms of stiffness degradation, strength degradation and energy dissipation, the degradation has a similar trend. The result also shows that the recommended type of loading protocol that can be used on assessing a structure seismic performance optimally is the loading protocol TP-01, this type of loading protocol is same as the recommended type from ACI 364, where in this type of loading protocol there are a repetition of loading in the form of drift ratio for several cycles before the loading followed by an increase in the next value of drift ratio. With loading protocol TP-01, eventhough the number of cycles is quite a lot due to repetiotion loading, the stiffness and strength degradation that occurs is not too large and the energy dissipation of the structure is quite large, compared to the other types of loading protocol.

"

"ABSTRAKThe study assumes that Srinagarind Dam of Kanchanaburi province will be collapsed by overtopping with a final breach of trapezoidal shape due to heavy rainstorm. Subsequently, various forms of demolitions and dynamic flooding are identified using Dam Break and Hydrodynamic models of MIKE 11 by applying the principle of the Probable Maximum Flood (PMF). Srinagarind dam is a rock fill dam with it is crest at +185.00 m. from Mean Sea Level (MSL) and store a maximum volume of 17,745 million m3 of water at the beginning of the break. For dynamic flooding prediction, the maximum breach outflow discharge was 11,307 m3/s with a velocity of 5.39 m/s at 62.29 hours after the break. In addition, the maximum discharge, water level and flood duration at cross sections of main rivers are also extracted for flood zone identification into 4 zones which include: at Ban Phu Thong Maeo, Wang Dong Sub-district, Mueang Kanchanaburi district, the discharge is 14,231 m3/s, the maximum water level is +56.56 m. (MSL.) at 68.28 hr. after dam failure. At Ban Nuea, Ban Nuea Sub-district, Mueang Kanchanaburi district, the discharge is 14,081 m3/s and the maximum water level is +41.59 m. (MSL.) at 83.21 hr. after dam failure. At Ban Wang Khanai, Wang Khanai Sub-district, Tha Muang district, the discharge is 13,244 m3/s and the maximum water level is +37.671 m. (MSL.) at 93.24 hr. after dam failure. At Ban Luk Kae, Ban Don Khamin Sub-district, Tha Maka District, the discharge was 12,047 m3/s, the maximum water level is +18.92 m. (MSL.) at 107.26 hours after dam failure. Land use land cover (LULC) types are affected by the flood after the dam-break which would cover an area of 1,172.21 sq.km. (1) Urban and built-up area (City, town, and commercial areas), (2) Paddy field, (3) Field crop, (4) Orchard, (5) Horticulture, (6) Pasture and farm house, (7) Evergreen forest, (8) Deciduous forest, (9) Natural water bodies (10) Reservoir (11) Rangeland, and (12) Mine and pits are included. The most affected LULC is paddy field that covers an area of 331.88 sq.km. (28.32%). The second and third largest affected LULC are rangeland and field crop areas that covered an area of 285.66 sq.km. (24.37%) and 267.02 sq.km. (22.78%). The least affected LULC is a deciduous forest that covers area of 15.49 sq.km. (1.32%)."

"ABSTRAKThe study assumes that Srinagarind Dam of Kanchanaburi province will be collapsed by overtopping with a final breach of trapezoidal shape due to heavy rainstorm. Subsequently, various forms of demolitions and dynamic flooding are identified using Dam Break and Hydrodynamic models of MIKE 11 by applying the principle of the Probable Maximum Flood (PMF). Srinagarind dam is a rock fill dam with it is crest at +185.00 m. from Mean Sea Level (MSL) and store a maximum volume of 17,745 million m3 of water at the beginning of the break. For dynamic flooding prediction, the maximum breach outflow discharge was 11,307 m3/s with a velocity of 5.39 m/s at 62.29 hours after the break. In addition, the maximum discharge, water level and flood duration at cross sections of main rivers are also extracted for flood zone identification into 4 zones which include: at Ban Phu Thong Maeo, Wang Dong Sub-district, Mueang Kanchanaburi district, the discharge is 14,231 m3/s, the maximum water level is +56.56 m. (MSL.) at 68.28 hr. after dam failure. At Ban Nuea, Ban Nuea Sub-district, Mueang Kanchanaburi district, the discharge is 14,081 m3/s and the maximum water level is +41.59 m. (MSL.) at 83.21 hr. after dam failure. At Ban Wang Khanai, Wang Khanai Sub-district, Tha Muang district, the discharge is 13,244 m3/s and the maximum water level is +37.671 m. (MSL.) at 93.24 hr. after dam failure. At Ban Luk Kae, Ban Don Khamin Sub-district, Tha Maka District, the discharge was 12,047 m3/s, the maximum water level is +18.92 m. (MSL.) at 107.26 hours after dam failure. Land use land cover (LULC) types are affected by the flood after the dam-break which would cover an area of 1,172.21 sq.km. (1) Urban and built-up area (City, town, and commercial areas), (2) Paddy field, (3) Field crop, (4) Orchard, (5) Horticulture, (6) Pasture and farm house, (7) Evergreen forest, (8) Deciduous forest, (9) Natural water bodies (10) Reservoir (11) Rangeland, and (12) Mine and pits are included. The most affected LULC is paddy field that covers an area of 331.88 sq.km. (28.32%). The second and third largest affected LULC are rangeland and field crop areas that covered an area of 285.66 sq.km. (24.37%) and 267.02 sq.km. (22.78%). The least affected LULC is a deciduous forest that covers area of 15.49 sq.km. (1.32%)."

"Tesis ini merupakan sebuah kajian pada Daerah Hilir Situ Gintung pasca bencana. Produksi ruang pada daerah resapan/ruang terbuka hijau dan pola hubungan kegiatan masyarakat merupakan sebuah siklus yang menjadi basis intervensi disain dengan mempertimbangkan faktor keseimbangan antara manusia dan lingkungan secara berkelanjutan. Usulan pemanfaatan daerah hilir sebagai Sentra Pertanian Organik dan Perikanan Darat merupakan optimalisasi boundaries-batas garis sempadan sungai dan ruang terbuka hijau sebagai generator ekonomi alternatif yang dikelola dan dimanfaatkan bersama untuk meningkatkan taraf hidup masyarakat. Penataan kawasan diarahkan untuk mendukung keberadaan sentra budidaya tersebut agar terbentuk pola hubungan kegiatan masyarakat dan produksi ruang yang aman, nyaman, produktif dan berkelanjutan di masa mendatang.

---

This thesis is a study on Downstream Areas in Situ Gintung post-disaster areas. Production of space by the community activity relationship in the green space as a catchment area is a cycle that becomes the basis of design interventions that considers the balance of human and the environment in a sustainable manner. The proposed utilization of downstream areas as Organic Agriculture and Fisheries Center, is the optimization of boundary demarcation line, rivers and open spaces as an alternative economic generators that is managed and utilized together to improve standard living of the community. The planning aimed for the areas tend to supports the existence of such center in order to form the pattern of community activities and relations of space production that is safe, comfortable, productive and sustainable in the future."

"Bendungan merupakan sebuah bangunan yang mempunyai risiko tinggi jika terjadi keruntuhan yang disebabkan oleh gempa bumi. Keruntuhan akibat gempa bumi pada bendungan dapat menyebabkan adanya korban jiwa, dan juga kerugian materi pada penduduk yang bermukim dekat dengan bendungan. Tujuan dilakukan penelitian ini adalah untuk mengevaluasi dan merekomendasikan pola operasi pada bendungan di Pulau Jawa dan untuk mengklasifikasikan risiko dan bahaya yang terjadi pada konstruksi bendungan akibat adanya gempa bumi di Pulau Jawa. Pada analisis risiko gempa bumi pada sistem operasi bendungan di pulau jawa ini menggunakan metode analisis kualitatif dengan melakukan wawancara kepada narasumber yang sudah ahli dan berpengalaman selama berpuluh tahun di bidang kegempaan maupun keairan setelah itu dianalisis menggunakan metode Miles dan Hubberman mulai dari pengumpulan data, reduksi data, penyajian data, dan kesimpulan. Setelah didapatkan hasil dari analisis dengan metode Miles dan Huberman dilakukan proses perbandingan dengan bendungan yang dijadikan benchmarking. Hasil dari analisis dan perbandingan menunjukan bahwa adanya kesamaan antara pendapat narasumber dan pola operasi bendungan mengenai adanya pengerukan pada bendungan yang diadakan minimal 5 (lima) tahun sekali untuk menghindari adanya pengendapan baik untuk lumpur ataupun sampah. disamping itu, perlu dilakukan pemeliharaan di lingkungan sekitar bendungan seperti memperbaiki jalur dan pagar hewan ternak, melakukan penanaman kembali pada daerah yang terkena erosi dan parit di bendungan, dan pembersihan rumput liar guna memperbaiki ekosistem di sekitar bendungan. Dan juga risiko terjadinya kerusakan bendungan akibat gempa bumi dapat dilihat dari dimana lokasi bendungan tersebut dibangun. Sebuah bendungan yang berada di wilayah dengan risiko gempa bumi yang tinggi, memiliki risiko lebih rendah jika dibangun dengan prinsip-prinsip rekayasa bangunan tahan gempa bumi. Di sisi lain, sebuah bangunan yang terletak di suatu daerah dengan sejarah kegempaan kecil, namun berada di tanah yang berpotensi likuifaksi mugkin memiliki risiko gempa bumi yang tinggi.

---

The dam is one of construction that has a high risk of collapse if caused by an earthquake. A collapse due to an earthquake in a dam can cause casualties, and also material loss to residents who live near the dam. The purpose of this research is to evaluate and recommend operating patterns on dams in Java and to classify risks and dangers that occur in dam construction due to earthquakes in Java. In the analysis of earthquake risk in the dam operating system on the island of Java using qualitative analysis methods by conducting interviews with experts who are experts and experienced for decades in the field of seismicity and water after it is analyzed using the Miles and Hubberman methods starting from data collection, data reduction, data presentation, and conclusion. After obtaining the results of the analysis using the Miles and Huberman method, a comparison process with the dam is used as a benchmarking. The results of the analysis and comparison show that there are similarities between the opinion of the sources and the pattern of dam operations regarding the dredging of the dam which is held at least once every 5 (five) years to avoid any deposition either for mud or garbage. In addition, maintenance needs to be carried out in the environment around the dam such as repairing animal lanes and fences, replanting erosion affected areas and ditches in the dam, and cleaning weeds to improve the ecosystem around the dam. And also the risk of damages caused by earthquakes can be seen from where the location of the dam was built. A dam in an area with high earthquake risk has a lower risk if it is built with the principles of earthquake resistant building engineering. On the other hand, a building that is located in an area with a small earthquake history, but is located on land that has the potential for liquefaction may have a high risk of earthquake."