Jurnal Rekayasa Konstruksi Mekanika Sipil
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Analisis Faktor-Faktor Eksternal Yang Mempengaruhi Produktivitas Tenaga Kerja Pada Pekerjaan Pembuatan Batako
Full text linkproductivity is the ratio between output and input, or the comparison between product results and the total resources used. Based on several field observations, the productivity of labor spread across the city of Kupang, especially in brick production, varies greatly. As a result of varying productivity, the results obtained are also very varied. This research was completed with a multiple regression analysis method that began with the collection of raw data through site surveys the distribution of questionnaires to respondents including the owners of brick companies and brick workers in the city of Kupang. Of the five external factors that are used to determine how they affect the productivity of brickworkers in Kupang City, the influence factor is the weather. The significant value of the effect of X3 on Y was 0.279 > 0.05 and the t value was 2.095 > t table 2.00758. Thus it can be concluded that H3 is accepted which means there is an influence of X3 on Y. While the other four factors namely the distance of raw materials to the production machine, cleanliness, wages and motivation do not affect the productivity of the brickworkers.
Kajian Infrastruktur Ramah Lingkungan Di Perkotaan
Full text linkThe city is an important part of the population as a space to work and socialize with fellow residents who occupy it. Not surprisingly, most of the population moves towards the city to get a more established livelihood. Data shows that the majority of the population living in the villages began to move to the city for various reasons, as indicated by the high rate of urbanization from year to year. One day the village will lose its role as a food barn for residents of the region. On the other hand, infrastructure needs in urban areas tend to increase which results in a decline in natural resources, especially those that are not renewable.To maintain a balance between the capabilities of nature providing various types of natural resources and infrastructure needs that continue to increase from year to year. The right approach is needed by implementing environmentally friendly development. This study discusses environmentally friendly approaches that are implemented in several infrastructures, namely (1) Eco-friendly sea port consisting of 23 important factors, (2) Environmentally friendly airport consisting of eight aspects, (3) environmentally friendly train station that covers three aspects, (a) in the train station environment, (b) along the railroad, through a tree planting greening program that absorbs CO_2 emissions, (c) Appropriate use of water quality and amount, for toilet purposes on trains using used water or rainwater harvested during rain
Identifikasi Sistem Drainase Untuk Penanganan Banjir Kota Medan
Full text linkMedan City as the capital city of North Sumatra Province has experienced a fairly rapid development in recent years. Various development sectors grow and develop along with increasing economic growth. The housing, services and trade sector is a significant sector of progress. This has resulted in increased intensity and expansion of land use in urban areas. The cause of the flood problem in Medan City is not only absolutely in the downstream of the river, but also in the upstream and middle of the river. The more critical the water catchment area in the Deli river, which is the main watershed that flows in Medan City, where it is estimated that the good condition of the land currently only ranges from 3-4%, causing the flow of the flow to be greater in the downstream. Thus the management and control of the flood in Medan needs to be taken into account with regard to the topographic conditions
Analisis Kondisi Keruntuhan Dan Beban Tekuk Kolom Profil Baja
Full text linkThis study discussed the H and WF steel profiles that encountered axial compressive forces. A structural element with a straight geometry was loaded by axial compressive forces which is started from 1 N until the highest load that could be achieved. This simulations was done by finite element method program of Ansys R18.0. In this study, an analysis of the H and WF steel profiles was carried out to obtain failure conditions and the value of buckling load that can be achieved from the steel profile with variations in type of restraints. The buckling load analysis is carried out theoretically (literature) and compared with eigenvalue buckling by Ansys R18.0. The buckling load generated by Ansys R18.0 will also be analyzed to obtain the effective length conversion factor (K) and then compare it with the K value got from the existing literature.The results showed both H and WF steel profile underwent failure by flexural buckling conditions, meanwhile the largest buckling load is 1.452,5729 kN of H 200x200x12x8 profile with fixed-fixed type of restraints, and the smallest buckling load was found 1,7639 kN of WF 100x50x7x5 profile with fixed-free type of restraints by the theoretical analysis. The effective length conversion factor (K) by using Ansys R18.0 was found 6% smaller than the existing literature. The buckling loads calculated by Ansys R18.0 was found 12% greater than the results of theoretical analysi
Hubungan Antara Pola Tutupan Lahan Terbangun Dan Laju Infiltrasi Air Hujan
Full text linkKupang City is an area in Indonesia which has a relatively low number of rainy days. This causes the supply of clean water or drinking water in Kupang City to decrease. The high infiltration rate not only increases the amount of water stored in the soil, but also reduces flooding and erosion caused by run off. This study aims to model the relationship between infiltration and discharge capability for each type of samples land by using linear regression method. For this reason, a water absorption test was conducted on the built up area based on the infiltration rate. The results of experiments and calculations using linear regression shown that area often received heavy load such as vehichles had lower infiltration rate leading to slow inundation height decrease. While areas rarely received heavy load had higher infiltration rate. Even though the difference is only around 2-3 cm / 5 minutes, it indicates that the availability of open areas is still needed to support the implementation of the zero run-off model in urban built area
Pemilihan Moda Transportasi Pematangsiantar menuju Bandara Silangit Dengan Metode Stated Preference
Full text linkThis study aims to understand user’s mode choice preference between bus and private car in making trip from Pematangsiantar to Silangit Airport. We collected responses from 188 respondents who make the trip between aforementioned route. Majority (36% and 41%) states that tariff is the reason to choose bus, and convenience for private cars respectively. The utility function for choosing bus over car is: (Ubus–car) = 0.127 - 0.042X1 - 0.012X2 - 0.019X3 + 0.072X4 + 0.282X5; where: X1 = difference in cost, X2 = time difference, X3 = headway difference, X4 = service difference and X5 = difference in frequency. This study finds that users mode choice preference is sensitive to the difference in service and frequency. The increase in these two attributes improves probability in choosing bus. Further, the probability of choosing bus is still high if there is no change in cost, time, headway difference of the current condition
Analisis Efektifitas Halte Di Kota Medan
Full text linkIn the city of Medan, bus shelter where passengers could wait for Angkot (local paratransit) to stop has not been fully utilized. In this study, we evaluate the effectiveness of bus shelters along main corridor in Medan. The evaluation is conducted based on official government standard, occupancy level, and also user perception. We have surveyed 35 shelters, among which 16 stops (45.71%) are mid-block, 8 stops (22.86%) are farside, and 11 types (31.43%) are near-side. In accordance with bus stop standards, only 9 stops (25.71%) are considered . The results of this study indicate that the factors that influence the use of shelters in waiting for Angkot are as follows: awareness about shelters location, distance to reach shelters, waiting times at shelters, shelter facilities. The effectiveness of using bus stops in Medan City is 32.58%, which means the shelter in this corridor is considered veryineffective (between 20.10% -40.00%)
Analisis Potensi Likuifaksi Akibat Gempa (Studi Kasus : Reklamasi Pelabuhan Kontainer Belawan Fase-2)
Full text linkOne of the impacts caused by an earthquake is the strength loss of the soil due to cyclic stresses calledliquefaction. Liquifaction usually occurs in loose sand. The objective of this study is to determine thepotential of liquefaction in observed project. The project observed in this study is reclamation project.Analysis for potential liquefaction is done using the Simplified Procedure Method. Firstly, determinethe value of peak acceleration in bedrock in the study area based on the 2010 Indonesian EarthquakeHazard Map. Secondly, collect soil data based on CPT-u testing. Based on these data, the accelerationvalue (Amplification/Deamplification) can be found on each soil layer when being moved from thebedrock to the ground surface. By comparing the average shear stress caused by the acceleration ofthe earthquake to the effective vertical stress at each soil layer, we can obtain the value of CyclicStress Ratio. Lastly, calculate CRR (Cyclic Resistant Ratio) which is the value of soil resistance toliquefaction. Based on CRR value, it can be seen the corrected conus penetration value (qc1N). Thethree parameters are then connected in the NCEER 1996 chart to assess which soil layers arepotentially liquefied or not during an earthquake
Studi Desain Reklamasi Dengan Timbunan Bertahap dan Prefabricated Vertical Drain dengan Metode Elemen Hingga
Full text linkSoft clay substantial settlement and requires longer time to finish consolidation. The observed project in this study is reclamation project. Reclamation is carried out with a gradual piling method so that the strength gain occurs in the soil layer under reclaimed soil. Piling is done repeatedly, with an initial elevation of +2m, second piling with a total elevation of +5m, and the third piling with a total elevation +8mASL. Piling material in this project is compacted sand material, with specified specifications. The use of sand material results in the potential for liquefaction. Therefore it is necessary to conduct soil improvement, and PVD with preloading is chosen which is useful for accelerating the consolidation time. The Prefabricated Vertical Drain method is installed along the reclamation area. This study aims to analyze the soil settlement over time both using PVD and without using PVD. The effect of PVD installation by preloading was analyzed using PLAXIS 2D with axisymmetric for single-drain, and was further modeled in multi drain using plane strain. Single drain modeling into multi drain needs to be done axisymmetic equivalence to plane strain. The soil parameters used are the results of the N-SPT value correlation from various sources
Analisa Probabilitas Perpindahan Moda Transportasi Dari Bus Ke Kereta Api Rute Medan-Kotapinang Menggunakan Metode Stated Preference
Full text linkThe 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