Penggunaan Abu Vulkanik Sinabung Terhadap Stabilitas Campuran Aspal Beton (Hot Mix)

Mount Sinabung located in Karo regency North sumatera has continuously been erupting since 2010, generating vast amount of waste in the form of volcanic ash. This research aims to investigate the feasibility of utilizing this volcanic ash in asphalt mixture. We used volcanic ash to replace the conventional filler material from stone crush. Sinabung volcanic ash has lower specific gravity,therefore could fill more void in the asphalt mixture, which can affect the value of Marshall test criteria. Asphalt mixture in this study uses the procedure of Hot Mix Asphalt with mixing temperature ranging from 135°C - 150°C. The result shows that the use of Sinabung volcanic ash is feasible to replace the conventional stone crush filler material in these conditions: optimum asphalt content is 6.85%; percentage of volcanic ash-stone ash 50%-50%. According to national standards issued by Bina Marga of Ministry of Public works, the following values comply with the required value. Bulk density density 2.416 kg/cm3, air void 4.724%, Void in Mineral Aggregat 18.667 Void Fillet withAsphalt 74.706%, stability 1000,992 kg, Marshall quotient 3.132 kN/mm, and flow 3.133 mm.

Perencanaan Hidrolis Pintu Pada Bangunan Pengambilan Air (Intake)

The planning process of an intake water building must be conducted properly, such by considering several aspects namely topography, hydro-climatology, and also hydraulic condition of existing stream. In the planning of intake water building, the dimensions of water gate are based on the existing weir building. The Existing Dam building in this study is Sei Bingei weir. This weir was constructed to detain the flow of Bingei River. The weir is used to collect water to fill the demand of water company (PAM) Tirta Sari Binjai City.

Analisa Probabilitas Perpindahan Moda Transportasi Dari Bus Ke Kereta Api Rute Medan-Kotapinang Menggunakan Metode Stated Preference

The construction of railway line between Rantau Prapat and Kotapinang is expected to ease transportation process from Medan to Kotapinang, which could improve economic activities and become the alternative solution to make a trip. At the moment, existing public transport that covers this route is strictly limited to only medium or big buses. This research aims to identify the characteristic of trip maker and also to analyze the probability of mode shifting from bus to train for the mentioned trip. We use stated preference survey questionnaire, and it was distributed to random minimul sample needed. In order to obtain the utility function of the trip maker, the obtained data was then modeled in binomial logit method using SPSS statistical software. Tthe analyzed attributes difference (Δ) are trip cost difference (ΔX1), waiting time difference (ΔX2), travel time difference (ΔX3). The generated model has 0.114 of R2, and the probability of shifting from bus to train is 31.93% if the trip cost difference was Rp. 30.000. Meanwhile, the probability of shifting is 50.15% if the waiting time difference was less then 30 minutes. Lastly, the probability of shifting is 57.96% if the travel time difference was 1 hour.

Kajian Pemilihan Moda Transportasi Rute Bandara Kuala Namu – Medan

Transportation is defined as the process of moving passengers or goods from one place to another. In transportation planning, mode choice analysis is one of the important things that needs to be conducted in order to obtain traveler’s reasoning and factors that affect their choices. In this study, we conducted mode choice analysis for Kuala Namu airport to Medan trip. Several factors that areinfluential to mode choice are safety, convenience, cost, and travel time. We use Analytical Hierarchy Process (AHP) to analyze the weight of importance of these factors according to the travelers. Questionnaires were distributed followed by interview with respondents that actually make the trip between the two places. The result shows that safety (51.93%) is the main important factor, followedby convenience (36.11%), cost (24.04%), cost (9.01%), and travel time (2.95%). In terms of preferred mode according to travelers, train and private car are the best alternative with the value of 45.20% and 41.75% respectively. The least favorable alternatives are bus (7.43%) and taxi (5.62%).

Kajian Kriteria Perencanaan Dan Metode Pelaksanaan Struktur Reservoir

Reservoir is a building used as a place to hold clean water before being distributed. Artificial resevoir can be a steel tank or reinforced concrete tub. For reservoir that is planned to accommodate large amounts of water capacity, it is usually more effective to use reinforced concrete. Evaluation and analysis of reservoir construction is one of the important aspects to ensure that the reservoir design meets the requirements of strength and stability, as well as functional abilities. The problem that often occurs in reservoir buildings is the occurrence of uncontrolled uplift which results upward movement in the construction of the reservoir, and also the reservoir building often decreases differently due to improper foundation systems. This different decline resulted in cracks on the floor of the reservoir building which in turn will cause damage and malfunction of the reservoir construction. This paper contains a study of planning evaluation and analysis, and the method of implementation of severalconstructions of reservoir structures that have been carried out. The results of this study are expected to provide input and help planners and contractors to build reinforced concrete reservoirs that comply with the correct planning criteria, so that the building can function properly as planned.

Perencanaan Jembatan Beton Prategang Dengan Bentang 24 Meter Berdasarkan Standar Nasional Indonesia (SNI)

Bridge is used to connect divided road sections, which are seperated by obstacles such as deep valley, river, lake, irigation canals, railway, and also grade seperated roadway. The construction of a bridge must comply with several requirements namely stiffness, deflection, and load bearing requirement. This research is a structural analysis and design of prestressed concrete girder beam with 24m length and 6.5m width. Working loads are dead load (MS), additional dead load (MA), vehicle load (TD), braking load (TB), pedestrian load (TP), and wind load (EW). Internal forces are obtained using Finite Element Method in SAP2000 nonlinear. Design of the bridge structure follows the national standar SNI 1725:2016 and RSNI T-12-2004. Result of structural design and analysis of the prestressed concrete girder beam uses 4 prestressed beam (160cm height, 1.83m distance between beam), 20cm bridge slab, and diaphragm with the dimension of 20x165x125cm . The number of tendon used in the design is 3, and each tendon comprises of 12 strand. The amount of prestressed force caused by jacking is Pj=5351.30 kN with loss prestress 24.52%. Deflection caused on the prestressed beam is dmaks = 12.6 mm (<dijin =80 mm), and occuring stress is 8696 kPa (< allowed stress 18675 kPa).

Studi Potensi Air Buangan Permukaan Perkotaan Sebagai Sumber Air Irigasi

Indonesia geographical location (60LU-110LS) causes most of its region experience heavy amount of rainfall. Overflowing rain water is consequently ample in amount, and potentially a great source for irrigation. Both urban and subburbs part of Medan, where some primary livelihood is in agriculture, benefit from this natural event. However the level of availability all year is not certain. Too much in rainy season means flood, and too little means drought in dry season. Farmers normally neglected the importance of storing rain water in rainy season in order to supply the dry season, and thus becomes problem for farmers. How much water can potentially be used for agriculture in urban area, what is the relationship between water amount with soil texture, types of certain-soil-suitable crop, plant growth period. This research aims to analyze and answer this particular question.

Pemodelan Pemilihan Moda Rute Medan–Binjai Antara Kereta Api dan Bus dengan Metode Stated Preference

The objective of this research is to construct a user mode choice model between BRT Mebidang and Sri Lelawangsa railway line, and further to test the sensitivity of trip user choice toward certain change in attributes value. Data were collected using stated preference survey, and analysed using logit biner model. Based on user responses, it was found that 50.96% trip purpose is related to family/social matter, while the main reason to travel using both modes is convenience. The tility function of Mebidang bus is given as follow: UBM-KA = 7.256 - 0.565X1 - 0.031X2 + 0.101X3 - 0.071X4 + 0.088X5 where X1 is cost, X2 is time, X3 is headway, X4 is accesstime, dan X5 is service quality. The model shows that cost, time, and access time negatively affect Mebidang bus utility thus will lower the probability of user choosing bus over rail. In terms of sensitivity, access time and service quality are considered more sensitive in affecting the probability of choosing bus.

The Construction and Structure Reliability of Jam Gadang: The Heritage of West Sumatera

The Big Ben (Jam Gadang) is a tower building of 28.295 meters height positioned as the landmark and the heritage of both Bukittinggi city and West Sumatra province. It was built in 1926 by architects Yazin and Sutan Gigi Ameh as the gift from the Queen of the Netherlands to the controleur (secretary of Bukittinggi City). Major perception of the people that Jam Gadang was build by using masonry for the entire building. Following massive earthquakes in 2007 the Indonesian Heritage Trust in cooperation with the Shared Heritage Program of the Netherlands initiate full investigation of the tower. The activity was aimed at gathering data of the structure and analyzes the reliability of the current structure of the building. The result of such activities found that the construction of Jam Gadang consist of reinforced concrete with the compressive strength ≥ 25Mpa on average, the foundation consists of full stone with the prism shape until -1,800 mm. The column have a dimension with variation of 800 mm x 800 mm at the first floor and 400 mm x 400 mm at the top floor of the tower, with 18 mm longitudinal and 10 mm shear reinforcement, the beam and plate have the composite structure of steel beam H 105.90.10.25. The modeling and analysis of the structural reliability of Jam Gadang tower for earthquake load based on the Indonesian Code SNI-03-2847- 2002, with maximum lateral deformation of (δmax) 63.00 mm which is smaller than lateral deformation limit of 83.70 mm.

Tingkat Kepuasan Mahasiswa Terhadap Kualitas Pelayanan Angkot di Kota Medan

In general, urban transportation experiences similar problem, which is the low level of public transport occupancy. There are numerous factors that can cause such condition, of which can be summarized in the form of service quality shortcoming. Service quality of such public facility is measured and evaluated based on user experience, and planners utilize it to plan for future improvements. Importance-Performance Analysis is used in this research to identify aspects of service that are expected to be on top of enhancement priority list. Based on 159 students’ responses, it was found that six service criterias are in high-priority-quadrant. These are crowding, sitting comfort, hygiene, driver behavior, driver cleanliness, and security. Specifically, driver behavior aspect is regarded as highly prioritized, whereas on the contrary angkot fare and operating time are considered good enough and thus placed on low-priority list.