Judul: Analisis Struktur Pilar dan Pondasi Jembatan pada Proyek Jalan Tol Cimanggis-Cibitung
Abstrak: In order to distribute the superstructure’s load, substructure should be designed in such a way as to observe the condition of the landscape, soil bearing capacity, type and dimensions of substructural components, selection of materials and construction methods, as well as considering the environmental conditions in which the structure is built . This study aims to determine the flood water level of Cikeas River and plan the structure of the bridge foundation and pier on Cimanggis- Cibitung’s Tollway Projects. Pier’s structure which to be reviewed is P40 pier which has 17.8 m height and is located on the Cikeas River flow. Flood water level return 50 years period of Cikeas River is 2.4 m. Based on the analysis of soil carrying capacity, the selected soil bearing capacity using data of NSPT is 5210.541 kN with a kind of bored pile foundation, depth of 22 m, and a diameter of 1.2 m. The foundation is planned amount to 30 pieces (5 x 6 pieces) with an efficiency is 0.668. The foundation plan has met the safety criteria of the category axial load, lateral load, and the risk of structure settlement. Pier is designed “Y” shaped which has size 4x4 m. Pier is design with bending and shear steel but do not require torque steel.
Keyword: soil bearing capacity, bridge foundations, flood water level

Judul: Strength Analysis of Bridge Structure Based on Earthquake Load (Case Study: Cisomang Bridge Pubaleunyi Toll STA 100+700)
Abstrak: Kejadian-kejadian gempa besar yang pernah terjadi di Indonesia, mengisyaratkan bahwa upaya preventif perlu dilakukan dalam perancangan struktural pada suatu jembatan. Tujuan dari penelitian ini adalah menganalisis besarnya gaya dalam maksimum pada kondisi layan dan ultimit, menghitung jumlah tulangan PCI girder dan pier column, serta menganalisis periode getar, kekakuan struktur, dan displacement yang terjadi. Penelitian menggunakan Data sekunder as built drawing jembatan berupa data gambar dan dimensi girder, deck, pier head, dan pier column serta data material Jembatan Cisomang. Metode yang digunakan adalah pemodelan dan analisis gaya dalam menggunakan software CSI Bridge ver 22. Nilai kekakuan dari struktur Jembatan Cisomang didapatkan sebesar 176.682,1 kN/m. Besarnya perpindahan yang terjadi masih dibawah nilai displacement izin sebesar 168 mm. Girder dapat menahan momen dengan jumlah tendon 21 diameter 13 mm dan tulangan lentur (162D16). Namun, jumlah tendon dan tulangan lentur tersebut tidak memenuhi syarat tulangan lentur maksimum. Tulangan eksisting pada pier column mampu menahan gaya dalam yang bekerja sehingga tidak diperlukan tambahan tulangan., Major earthquakes that have occurred in Indonesia indicate that preventive measures need to be taken in the structural design of a bridge. The purpose of this study is to analyze the maximum internal force at service and ultimate conditions, calculate the amount of PCI girder and pier column reinforcement, and analyze the period of vibration, structural stiffness, and displacement that occur. The study used secondary data as built drawing bridges in the form of drawing data and dimensions of girders, decks, pier heads, and pier columns as well as material data for the Cisomang Bridge. The method used is modeling and force analysis using CSI Bridge ver 22 software. The stiffness value of the Cisomang Bridge structure is 176,682.1 kN/m. The amount of displacement that occurs is still below the allowable displacement value of 168 mm. The girder can withstand moments with a total of 21 tendons with a diameter of 13 mm and flexural reinforcement (162D16). However, the number of tendons and flexural reinforcement does not meet the requirements for maximum flexural reinforcement. The existing reinforcement in the pier column is able to withstand the working internal forces so that no additional reinforcement is needed.
Keyword: CSI Bridge, displacement, gempa, PCI girder

Judul: Ornithonyssus Bursa (Berlese, 1888) Famili Macronyssidae yang Menyerang Unggas Dan Penaggulangannnya
Abstrak: Ornithonyssus bursa adalah tungau penghisap darah pada unggas di daerah tropis dan subtropis. Tungau ini relatif kecil, dengan panjang tubuh antara 700-1000 mikron dan lebarnya 250-490 mikron. Tubuhnya bulat berwarna coklat kekuningan sebelum menghisap darh dan berwarna merah setelah menghisap darah dari induk semangnya.
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