Vol. 27 No. 1 (2020)

Dam is a useful infrastructure for human life. It helps supporting social and economic development. Damages to dams may cause negative impacts such as casualties and destruction. Thus, mitigation for dam related disaster has to be performed. This study uses derivatives of 1D and 2D shallow water wave equations. This equation is based on the principle of mass and momentum conservation. Furthermore, it is discretized using finite difference Forward Time Center Space (FTCS) scheme. Hansen

AbstractThe management and regulation of large inventories of embankment dams requires the use of tools and analytical techniques that can provide a uniform basis for comparison. Index Condition and Risk Assessment were two of those tools. Those two assessment can be combined to make an comprehensive assessment because it's main data are visual condition of dam. With those similarity, how to develop dam assessment based on dam's condition and safety are the main goals of this research. On these research, Condition Index with index from 1 to 5 are used for the condition assessment. Meanwhile,…

Runway is an area in an airport for aircrafts to land and take off. The maintenance of the facilities on both the airside and landside must be taken care of in order to maximize the performance of the airport. Based on the aircraft type service plan of Balikpapan Sultan Aji Muhammad Sulaiman Sepinggan Airport and to maximize the performance of airports at present and in the future, an assessment of the condition of the runway with a Pavement Condition Index (PCI) value parameter on the flexible pavement to obtain the optimal repair or maintenance needs was carried out. The PCI obtained in…

PPP scheme has stimulate increasing the volume of infrastructure development in Indonesia from the period of 2014 and planned until 2025, where the toll road business is carried out by business entities with a concession period. In the PPP scheme, various variables need to be considered, including project cost, project complexity, strong public support, and performance indicators in each phase of toll road concession. The construction phase in the PPP scheme in Indonesia is the responsibility of the business entity regulated in PP No. 43 of 2013. Determination of project delivery on toll road…

AbtractExisting special bridges such as cable-stayed bridges which are complex in structure need to be evaluated against SNI 1725:2016 and SNI 2833:2016. Dr. Ir. Soekarno Bridge located in Manado, North Sulawesi, was used as case study. Analysis based on the performance of the bridge was conducted using the Nonlinear Static Pushover Analysis (NSPA) with three different load distributions and Nonlinear Time History Analysis (NLTHA). Due to the standard load of the bridge, the deflection was still below the allowable deflection. Girder has an overstress of 12% in the Service Ic combination. The…

AbstrakStudi ini melakukan kajian yang signifikan terhadap kemungkinan terjadinya retak awal dan perambatannya yang rentan terjadi pada struktur-struktur di daerah marine. Retak beton yang terjadi merambat terutama di sepanjang interface zone yang secara signifikan dikondisikan oleh karakteristik agregat. Karakteristik agregat sebagai pengisi beton memiliki peran signifikan sebagai media pelepasan energi regangan dan dikenal sebagai energi fraktur. Hubungan energi fraktur dengan sifat material belum diidentifikasi secara jelas, dan sebagian besar studi menunjukkan ketidakpekaan relatif…

AbstrakStandar Nasional Indonesia (SNI) nomor 03-2834-2000 (SNI 03-2834-2000) memberikan empat jenis slope gradasi gabungan agregat kasar dan halus dalam pembuatan beton normal. Investigasi empat jenis slope gradasi agregat gabungan ini akan dilakukan untuk mengetahui pengaruhnya terhadap kuat tekan dan fracture toughness dari beton. Material dasar penyusun beton yang berasal dari Sungai Palu dan memenuhi kriteria standar SNl yang dipakai dalam membuat benda uji. Uji kuat tekan beton digunakan kubus berdimensi 150x150x150 mm dalam menentukan nilai kuat tekan beton (fc

AbstrakDesain hidrograf banjir diperlukan untuk merencanakan infrastruktur sumber daya air seperti waduk atau bendungan. Umumnya lokasi rencana infrastruktur sumber daya air belum tersedia data hidrologi untuk mendapatkan hidrograf banjir. Model hidrograf satuan sintetis (HSS) digunakan untuk memperoleh hidrograf banjir pada lokasi yang belum tersedia data hidrologi (ungauged). Model hidrograf satuan sintetis sangat populer digunakan di Indonesia karena keterbatasan data yang tersedia dan penggunaannya yang sederhana yaitu berdasarkan karakteristik DAS. Namun untuk mendapatkan hasil hidrograf…

Warm asphalt technology is an alternative for road pavement structures. One method to improve the performance of warm mix asphalt is by using fiber as an additive. This study aimed to analyze the effect of using aramid and polyolefin fibers in warm mix asphalt through several tests, to provide recommendations for the optimum fiber content. 4-point bending and triaxial tests on the DAC-16 asphalt mix sample with a fiber proportion of 0.05% of the total sample weight resulted in an increase in fatigue life of 100% and a decrease in creep coefficient of 20%. Then, a tensile test was conducted on…

This research is the continuation of previous research conducted by the author, where in this research a wave equation is developed using total acceleration equation for a function f (x, z, t) and formulated using a complete velocity potential. Based on the wave equation, shoaling-breaking model is developed and the breaker height produced by the model is examined. There is a conformity between breaker height a model and breaker height produced by the previous research. AbstrakPenelitian ini merupakan kelanjutan dari penelitian sebelumnya yang dilakukan oleh penulis, dimana pada penelitian…