Jurnal Rekayasa Konstruksi Mekanika Sipil			
            
            
            
            
            
            
            
            Jurnal Rekayasa Konstruksi Mekanika Sipil (JRKMS) UNIKA Santo Thomas Sumatera Utara meliputi kajian di bidang Teknik khususnya Teknik Sipil seperti Matematika teknik, Mekanika teknik, Analisis struktur, Konstruksi baja, Konstruksi beton, Konstruksi kayu, Konstruksi gelas, Mekanika tanah, Teknik Pondasi, Hidrologi, Hidrolika, Bangunan air, Manajemen konstruksi, Dinamika Struktur, Earthquake engineering, Informatika, Ilmu Ukur Tanah, Struktur bangunan sipil, Rekayasa Jalan Raya , serta penelitian-penelitian lain yang terkait
            
            
         
        
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                            Pemodelan Pemilihan Moda Rute Medan–Binjai Antara Kereta Api dan Bus dengan Metode Stated Preference 
                        
                        Zagoto, Indra Markeshwan; 
Sitindaon, Charles; 
Sitohang, Oloan                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 1 No 1 (2018): Volume 1 Nomor 1 Tahun 2018 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v1i1.235                                
                                                    
                        
                            
                                
                                
                                    
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.
                                
                             
                         
                     
                    
                                            
                        
                            Analisis Potensi Likuifaksi Akibat Gempa (Studi Kasus : Reklamasi Pelabuhan Kontainer Belawan Fase-2) 
                        
                        HUTAGALUNG, Mario; 
TARIGAN, Simon Dertha                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 2 No 1 (2019): Volume 2 Nomor 1 Tahun 2019 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v2i1.433                                
                                                    
                        
                            
                                
                                
                                    
One 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.
                                
                             
                         
                     
                    
                                            
                        
                            Identifikasi Sistem Drainase Untuk Penanganan Banjir Kota Medan 
                        
                        SILITONGA, Binsar                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 2 No 1 (2019): Volume 2 Nomor 1 Tahun 2019 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v2i1.434                                
                                                    
                        
                            
                                
                                
                                    
Medan 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.
                                
                             
                         
                     
                    
                                            
                        
                            Pemilihan Moda Transportasi Pematangsiantar menuju Bandara Silangit Dengan Metode Stated Preference 
                        
                        SITINJAK, Laskar Laurensius; 
SITINDAON, Charles                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 2 No 1 (2019): Volume 2 Nomor 1 Tahun 2019 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v2i1.435                                
                                                    
                        
                            
                                
                                
                                    
This 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 
                        
                        SITOHANG, Oloan; 
SITUMORANG, Anto Ervin                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 2 No 1 (2019): Volume 2 Nomor 1 Tahun 2019 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v2i1.436                                
                                                    
                        
                            
                                
                                
                                    
In 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%).
                                
                             
                         
                     
                    
                                            
                        
                            Adopsi Life Cycle Costing Untuk Bangunan Gedung Diklat Muara Enim 
                        
                        KAMING, Peter; 
LIANO, Ign. Himawan; 
SIGIT, W. Alexander                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 2 No 2 (2019): Volume 2 Nomor 2 Tahun 2019 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v2i2.525                                
                                                    
                        
                            
                                
                                
                                    
Both initial cost for construction and future costs for operation and maintenance of buildings are very important that must be considered by the building owner. Therefore, estimating Life Cycle Cost (LCC) in long term is a must in determining the amount of money spent for the building projects. The objective of this study is to apply a method for LCC to estimate overall costs starting from initial, maintenance, and operational costs. In this study, the LCC also incorporated inflation and bank interest rates in long-term perspective. In this study, LCC was implemented in a building that functioned as a training facility in a building complex in the Muara Enim District. Southern Sumatera. By using the LCC method for estimating cost for a period of 25 years, result shows that the proportion initial cost of construction is 39.12%, maintenance and replacement cost is 16.28%; and operational cost is 44.61%.
                                
                             
                         
                     
                    
                                            
                        
                            Analisis Faktor-Faktor Eksternal Yang Mempengaruhi Produktivitas Tenaga Kerja Pada Pekerjaan Pembuatan Batako 
                        
                        HENONG, Sebastianus Baki; 
LAKE, Reginaldo Ch.                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 2 No 2 (2019): Volume 2 Nomor 2 Tahun 2019 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v2i2.526                                
                                                    
                        
                            
                                
                                
                                    
productivity 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..
                                
                             
                         
                     
                    
                                            
                        
                            Pengaruh Epoxy Terhadap Sifat Mekanik Beton Dengan Bahan Tambah Kaca Sebagai Substitusi Agregat Halus 
                        
                        LISANTONO, Ade; 
TANDEAN, Evander                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 2 No 2 (2019): Volume 2 Nomor 2 Tahun 2019 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v2i2.521                                
                                                    
                        
                            
                                
                                
                                    
y concrete consists of cement, water, sand and gravel. To increase the adhesion of concrete materials is adding epoxy to the concrete. While, to make the concrete has a good in water-resistant is adding glass powder which is expected to fill the air cavity in the concrete. This study aims to determine the adhesion of epoxy to glass with aggregates in a concrete ixture. Substitution of fine aggregate with glass powder is 50% by weight of fine aggregate and the use of epoxy is 10% by weight of cement. Test specimens were cylindrical with the size of (150 × 300) mm. Specimens with the size of (500 × 100 × 100) mm were also made. The Tests were carried out at the age of 14 and 28 days of concrete. Three variations were made, namely normal concrete, concrete with glass powder, and concrete with glass powder plus epoxy. The test results show that the substitution of glass powder can improve the mechanical properties of concrete, while the addition of epoxy does not significantly influence the mechanical properties of concrete with glass powder.
                                
                             
                         
                     
                    
                                            
                        
                            Studi Desain Reklamasi Dengan Timbunan Bertahap dan Prefabricated Vertical Drain dengan Metode Elemen Hingga 
                        
                        ONGGO, Anthonius; 
TARIGAN, Simon Dertha                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 2 No 1 (2019): Volume 2 Nomor 1 Tahun 2019 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v2i1.432                                
                                                    
                        
                            
                                
                                
                                    
Soft 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.
                                
                             
                         
                     
                    
                                            
                        
                            Kajian Infrastruktur Ramah Lingkungan Di Perkotaan 
                        
                        ERVIANTO, Wulfram I.                        
                         Jurnal Rekayasa Konstruksi Mekanika Sipil Vol 2 No 2 (2019): Volume 2 Nomor 2 Tahun 2019 
                        
                        Publisher : Fakultas Teknik Universitas Katolik Santo Thomas 
                        
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                                    DOI: 10.54367/jrkms.v2i2.527                                
                                                    
                        
                            
                                
                                
                                    
The 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.