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Yusrizal Lubis
Universitas Harapan Medan
Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Kajian Desain Struktur Balok Pada Gedung Bertingkat Berdasarkan SNI 2847:2013 pada Gedung Menara BRI Medan Yusrizal Lubis; Diana Suita
Jurnal Simetri Rekayasa Vol 3 No 2 (2021): Edisi Oktober 2021
Publisher : Universitas Harapan Medan

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The BRI Medan Tower Building is a multi-storey building consisting of 12 floors and 2 basements, so that in planning the structure it must be designed to be strong and safe enough to withstand the load carried and withstand external influences on the structure. Previously, the BRI Medan Tower Building was a building with old design standards. Thus, this thesis aims to evaluate the design of beam structures in existing buildings based on SNI 2847:2013 concerning Requirements for Structural Concrete for Buildings. The method used is the beam analysis method using SNI 2847:2013. From the analysis results, it is found that the evaluation of beam analysis calculations obtained with the results in the field is the same. The installed compression reinforcement has not yielded so that the beam cross section is a tension controlled section. The flexural reinforcement distance in the beam is D10-200. The results of the evaluation of the beam analysis calculation obtained the amount of tensile reinforcement 14D25 and 4D25 and compression reinforcement 12D25 has been able to carry the load on the beam, so it can be concluded that the results of the planning have met the applicable requirements. SNI 2847:2013 can be used for planning reinforced concrete structures because the results obtained at the time of planning with the results in the field are the same.
PENGGUNAAN OLI BEKAS SEBAGAI BAHAN TAMBAH TERHADAP KARAKTERISTIK MARSHALL PADA DAUR ULANG OLI BEKAS Yusrizal Lubis; Kartika Indah Sari
Jurnal Simetri Rekayasa Vol 1 No 2 (2019): Edisi November
Publisher : Universitas Harapan Medan

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Recycling methods can be used to reduce road construction costs. One of the recycling methods is mixing asphalt with used oil (lubricating oil), this method has been used by several AMP (Asphalt Mixing Plate) companies for asphalt mixtures. However, there is no reference / reference for the percentage of the oil mixture that is commonly used as an asphalt mixture. It is feared that an inappropriate oil mixture will cause damage or make the asphalt mixture not according to the specified specifications such as the stability and flow value of the asphalt mixture. The method used is an experiment, where 15 test objects are made using asphalt pen 60/70 to determine the KAO, after the KAO value is obtained, then used oil is mixed with variations of 1%, 2%, and 3%. From this research, the value of Stability and Flow in used oil mixtures with a variation of 1% Used oil obtained a stability value of 1033,936 kg and a flow of 3,21 mm, with the addition of 2% used oil, a stability value of 1037,246 kg and a flow of 3,25 were obtained. mm, the addition of 3% used oil obtained a stability value of 1040,142 kg and a flow of 3,30 mm. As the variation of the mixture of Stability and Flow values ​​increases, the percentage of addition of used oil mixture at 1%, 2%, 3%, Stability and flow values ​​meet the 2010 general specifications (revision 3), where the stability value has a minimum of 800 and the flow value a minimum of 2 and a maximum of 4. From the results of the marshall test of used oil mixtures, which start from a variation of 1% to 3% seen from the marshall parameters and data processing, the variation that is used as the optimum asphalt content in used oil added ingredients is the used oil variation of 3%.
Pengaruh Lentur Balok Sloof Beton Bertulang Pada Struktur Kolam Renang Pada Apartement Mansyur Residence Kartika Indah Sari; Yusrizal lubis; Juli Ratna Sari
Jurnal Simetri Rekayasa Vol 3 No 2 (2021): Edisi Oktober 2021
Publisher : Universitas Harapan Medan

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Reinforced concrete is a combination of concrete and steel reinforcement, which work together for the given load. Steel reinforcement will provide a strong tensile that is not owned by concrete. In the design of reinforced structures, the most important thing when doing the design is the loan that occurs due to the load that the structure is holding. Flexible concrete structures should be designed to have sufficient rigidity to limit borrowing that might weaken the strength or serviceability of the structure under working loads. The first step is analyzing reinforced concrete beams by calculating the external forces (Ultimate Moment) using the SAP2000 application with known materials from the data and working drawings, then comparing the results of the calculation of internal forces with the moment of resistance on materials with MuMn requirements. The calculation of the moment of resistance (Mn) is based on (SNI 2847: 2013). After calculating the Momentum and nominal limits, Mu = 9.0304 kN.m < Mn = 66,832 KN.m, so as to secure the construction of the concrete sloof against the loan.
Perbaikan Nilai CBR Tanah Lempung Lunak Dengan Stabilitas Dua Tahap dengan Menggunakan Abu Vulkanik Yusrizal Lubis; Diana Suita
Jurnal Simetri Rekayasa Vol 2 No 1 (2020): Article April 2020
Publisher : Universitas Harapan Medan

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Soil with unfavorable characteristics often creates new problems, one of which is soft clay. Therefore, a soil improvement method is needed to change the characteristics of the soil. Two-stage stabilization using bukho rock ash and volcanic ash has the potential to overcome this problem. Based on the results of the study, the optimum CBR value was 9.245% from two-stage stabilization of soft clay soils with 12% bukho rock ash and 4% volcanic ash added. The addition of 6% bukho rock ash and 4% volcanic ash obtained 100% soil density. The addition of 9% bukho rock ash and 4% volcanic ash obtained 100% soil density. The addition of 12% bukho rock ash and 4% volcanic ash obtained 100% soil density. This shows that the effect of two-stage stabilization based on percentage variations can increase soil density.
Teoritikal Bentuk Bore Tsunami Menggunakan Metode Dambreak Dan Wavemaker Dengan Sistem DualSPHysics Kartika Indah Sari; Yusrizal Lubis; Ditya Andrean Supit
Jurnal Simetri Rekayasa Vol 4 No 1 (2022): Edisi April 2022
Publisher : Universitas Harapan Medan

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A tsunami is a large water wave with the impact of damage and destruction on facilities and infrastructure when it spreads to the mainland. In general, a tsunami approaching the coast forms a bore wave when a single uniform (solitary) wave in a tsunami breaks when it enters the coast. This research was conducted to determine the transition process of tsunami waves to form a bore, as well as to determine the characteristics of the tsunami bore shape. The bore tsunami research was carried out using the dambreak and wavemaker methods using the DualSPHysics simulation computational program, the dimensions of the open channel at the dambreak were 20.7 m x 1.43 m x 1.5 m. The beach modeling on the dambreak has dimensions of 12.7 m x 0.64 m with a slope of 1:20. The channel dimensions on the wavemaker are 135 m x 2 m x 5 m. The wavemaker beach model has dimensions of 60 m x 3 m with a slope of 1:20. The total number of particles in the dambreak simulation is 24,638,764. The simulation results provide information that the bore wave is the result of the transition of a solitary wave breaking as it approaches the shoreline. The wave height that was formed at the beginning of the formation will continue to increase in height until it approaches the shoreline
KAJIAN JARINGAN IRIGASI SALURAN PRIMER PADA KAWASAN KARANG ANYER KABUPATEN SIMALUNGUN Yusrizal Lubis; Diana Suita; Kartika Indah Sari
Jurnal Simetri Rekayasa Vol 3 No 1 (2021): Edisi April 2021
Publisher : Universitas Harapan Medan

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The Kerasaan irrigation area is an irrigation area located in Pematang Bandar District, Simalungun Regency, North Sumatra Province. With a functional area of ​​5000 (Ha) and a primary irrigation channel area of ​​31.02 (km). In optimizing irrigation performance in the Kerasaan irrigation area, maintenance of the irrigation network infrastructure must be carried out, one of which is by evaluating the irrigation channels in the area. This evaluation aims to identify and analyze the condition and function of irrigation assets in the Kerasaan irrigation area, so as to optimize the function of the irrigation canal to irrigate the lands in the irrigation area. The method used in evaluating the irrigation canal is the observation of method by tracing the irrigation network using a tool (GPS) to find out the coordinates of the channel point and documenting asset damage with a camera/mobile phone. Based on the results of the analysis, the total length of damage to the channel structure of the pair is 10 m from a combination of several segments in 2 canals in the primary channel with a total damage index of 0.70%. In the Kerasaan primary channel from the survey results as far as (± 1500 m) in the field, there are 1 unit of side spillway building, 2 units for tapping, and 2 units of mud bag building. The results of the analysis can be used for planning the construction of irrigation buildings by planning structures, sluice gates and measuring buildings.
KAJIAN PERBANDINGAN OPTIMALISASI PENJADWALAN DAN BIAYA PROYEK DENGAN METODE LEAST COST SCHEDULING Yusrizal Lubis; Diana Suita
Jurnal Simetri Rekayasa Vol 2 No 2 (2020): Edisi Oktober 2020
Publisher : Universitas Harapan Medan

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In making a comparison of the unit price of work (HSP) using the 2016 SNI regulations in the implementation of the construction of the AJIBATA Public Health Center, which is located on Jln. Construction of 2 AJIBATA, Pardemean AJIBATA, District, AJIBATA, Toba Regency, North Sumatra Province. The comparison is carried out using the 2016 Work Unit Price Analysis (AHSP) and the 2021 Work Unit Price Analysis (AHSP) by comparing the two analyzes used to see the comparison of material prices, wages, in each year and also the results of the second comparison. This analysis can be used as a reference in the future in carrying out the construction of other public facilities. In this stage, the data obtained directly in the field are used and also the plan drawing data used in calculating all the volumes of work to be carried out. The price of materials and wages in each region is very influential in the implementation of project development, so research is carried out to get a better price so that the use of funds can be maximized as well as possible. In the comparison of Work Unit Price Analysis (AHSP) 2016 and Work Unit Price Analysis (AHSP) 2021, the cost comparison of all work items between the two analyzes is 15%, of which the 2016 Unit Price Analysis (AHSP) has a cost of IDR 3,758. 157,389,76 and Analysis of Work Unit Price (AHSP) 2021 Rp. 4,337,533,610,2, . From the results of the second comparison, the analysis used does not include overhead / profit.
STABILITAS TANAH GAMBUT MENGGUNAKAN KAPUR (CaO) DITINJAU DARI PENGUJIAN KUAT TEKAN BEBAS (UNCONFINED COMPRESSION TEST) Diana Suita; Yusrizal Lubis
Jurnal Simetri Rekayasa Vol 4 No 1 (2022): Edisi April 2022
Publisher : Universitas Harapan Medan

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Organic soils pose many obstacles to the construction that will be built on it and are generally caused by physical properties of organic soils which have very high water content and low carrying capacity. The physical properties of a material will greatly affect the mechanical properties of the material as well as the organic soil. The mechanical properties of organic soils are very low, for example the value of free compressive strength (UCT). One method to increase the carrying capacity of the soil is by adding or mixing with materials that have a high soil carrying capacity. Adding lime to the sample in this study is expected to increase the carrying capacity of organic soil against free compressive strength (UCT). Then the sample is given the addition of lime with an additional percentage of 2%, 4%, 6%, 8%, 10% to see the comparison of the value of compressive strength (qu), after the addition of lime. The results of free compressive strength testing showed soil behavior in a sample condition with the addition of lime up to 10% experienced an increase in qu. The more the mixture of lime in the soil sample, the greater the value of free compressive strength (qu). In the original soil the value of free compressive strength (qu) was 0.837 kg / cm2, the soil was remoulded at 0.886 kg / cm2, and the free compressive strength (qu) at the addition of lime 10% was 1.132 kg / cm2.
Co-Authors Diana Suita Ditya Andrean Supit Juli Ratna Sari Kartika Indah Sari