Judul: Analisis Struktur Box Girder Jembatan Fly Over Rawabuaya Sisi Barat Terhadap Gempa
Abstrak: The Rawabuaya flyover bridge is the solution that is offered by the local government to overcome the traffic jam that often happens in the Rawabuaya area. It has an extremely vital function to disentangle the traffic congestion; therefore the structure must be strong in holding the on-going load, specifically the seismic load. The seismic load is dangerous to a structure because it has period that causes the structure to repeatedly shaken. If the movements happened continually, the structure will collapse ― depending on how much earthquake load that is being loaded on the structure. Therefore, it is essential to conduct an structure analytical on the earthquake resistance level of Rawabuaya flyover bridge based on the "Standar Perencanaan Ketahanan Gempa Untuk Struktur Bangunan Gedung dan Non-Gedung" RSNI 03-1726-2010 and "Peta Zonasi Gempa Indonesia 2010" to know further about the on-going deformation. This research is done thoroughly by recognizing the maximum forces in the combination of ultimate loads based on the most recent rules of encumbering, including the rules regarding the seismic load. The maximum forces in the combination of ultimate loads will then compared with the forces' nominal values, especially those that related to the seismic load. From the research, it can be concluded that the values of maximum forces in the combination of ultimate loads have the combined seismic load that works on the upper structure of box girder as well as on the structure beneath the pier of Rawabuaya flyover bridge with a maximum momentum values of 800300,80 KNm that applies to Pier P6B with the combination of the singular ultimate load, the additional dead load, the prestress load, and the “T” truck load. Impairment to the structure is bound to happen if the combination of ultimate load is forced to work continuously on the Rawabuaya flyover bridge. Meanwhile, the result of the compared maximum forces in the combination of ultimate load with the values of nominal forces indicates that the Rawabuaya flyover bridge has a large amount of seismic load with 10% difference. It means this structure can resist 90% of ultimate seismic load, which requires the usage of reinforcements on the upper structure of box girder as well as the on the structure beneath the pier to increase the concrete stress power and the tendon on the upper structure of box girder to increase the tensile of the concrete.
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Judul: Analisis dan Desain Jembatan Frame, Kolom “V”, Box Girder, dengan Mempertimbangkan Beban Gempa
Abstrak: The growing of economic, social, cultural and environmental influenced by the availability of infrastructure, such as bridges. The bridges often used as a city icon. Selection of bridge structures important to adapt the structural strength and stability, serviceability structure, durability, ease of implementation, economic, and aesthetic. Strength of bridge structure in Indonesia is strongly influenced by earthquake load. Therefore, the construction of flyover Simpang Jam Batam needs to be built and studied. This study aims to analyze and design the frame bridge with "V"column and boxgirder, consider to earthquake load, and design reinforced concrete structures. The methods are data collection, preliminary dimension, modeling in CSI Bridge, and reinforcement design. The study started at April to July 2013 in Department of Civil and Environmental Engineering, Bogor Agricultural University. The result is the maximum forces obtained occurs in combination ULS-4a and SLS-4a, that moment values are 66298.6 kNm and 37494 kNm, whereas shear force values are 9735.71 kN and 6346.73 kN. Based on the results, boxgirder flexural reinforcement at top slab is D19-100 and D19-200, bottom slab and web are D16-150. Meanwhile, boxgirder shear reinforcement needs only at web is D16-150. Column "V" reinforcement is D25-150 to flexural and D16-150 to shear.
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Judul: Plant propagation and induction of somaclonal variation on Dianthus caryophyllus Linn. through in vitro culture
Abstrak: Penelitian ini bertujuan pertama untuk mendapatkan metode perbanyakan in vitro Dianthus caryophyllus Linn. yang menghasilkan planlet tegar, mampu tumbuh dan berkembang menjadi tanaman dewasa dan berproduksi (berbunga), dengan menggunakan retardan. Tujuan kedua mendapatkan metode untuk memperoleh keragaman somaklon melalui tehnik in vitro baik tanpa radiasi maupun dengan radiasi.
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