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All Journal Jurnal Ilmiah Universitas Batanghari Jambi JURNAL SUMBER DAYA AIR Journal of Sustainable Civil Engineering (JOSCE) Menara: Jurnal Teknik Sipil Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil International Journal of Civil Engineering and Infrastructure (IJCEI)
Sembiring, Kristina
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Transportation

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Analisis Struktur Beton Pelat Lantai dan Balok dengan Metode Bekisting Sistem Fix Shoring Arisyi, Luthfan; Dewita, Hikma; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 8 No. 2 (2024)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v8i2.15598

Abstract

In the construction of a building, it is necessary to plan a concrete structure that can make us feel safe and comfortable. The concrete structure itself is very close to making a slab and beam, the design and implementation of a slab and beam has many innovations in the manufacturing process. One of the information during the construction of the structure is formwork with a fixed shoring system. Where when the formwork can be removed quickly enough from the usual time, this will cause a reaction on the structure itself and the fix shoring is the part that reduces the impact of the reaction. The purpose of this study was conducted to find out whether the fix shoring system formwork is able to provide safe results according to the building permit. The fix shoring method based on the results of the analysis obtained, the floor slab concrete structure was able to withstand the deflection that occurred on day 2 (2.891 of the maximum deflection of 8.333). Meanwhile, the elastic deflection only met the requirements on day 3 (Mu<Mcr, 8.729 kN/m < 8.700 kN/m). For the concrete structure itself has a size of 40x70 and 30x70. The conclusion is that the overall results comply with the specified permits from the pedestal to the field. It can be stated that the formwork of the fixed shoring system, on the 3rd day, the formwork can be removed without affecting the state of the concrete structure.
CONTROL OF SCHOOL FACILITIES AND INFRASTRUCTURE PROJECTS OF OGAN KOMERING ILIR REGENCY AND OGAN ILIR REGENCY Sanrach, Handa Dwi; Dewita, Hikma; Sembiring, Kristina; Nabiho, Pio Ranap Tua
International Journal of Civil Engineering and Infrastructure Vol 3, No 2 (2023): IJCEI Volume 3 No. 2
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.3.2.21-30

Abstract

The project and school infrastructure of Ogan Komering Ilir Regency and Ogan Ilir Regency aims to determine project performance. The analysis was carried out based on completed projects in the aspects of time and cost control using the Earned Value Analysis concept which consists of three indicators, namely BCWS, BCWP and ACWP. The analysis was carried out on time deviations (SV), cost deviations (CV), total budget deviations (BV) and was carried out in weeks (21 weeks). From this deviation analysis, productivity and project performance can be analyzed again, such as the time performance index (SPI) and Cost Performance Index (CPI). Based on Earned Value analysis, the schedule deviation (SV) on the project is 0. This means that in Week 21 the heavy work carried out was completed according to plan. Apart from that, the time performance index on the project is 1 (implementation completed according to schedule), while the cost performance index is 1.03 (1.3 > 1 which means expenditure is lower than planned).
EFFECT OF THE USE OF WOOD CHARCOAL ASH ON THE COMPRESSIVE STRENGTH OF NORMAL CONCRETE William, Martin Richardo; Sembiring, Kristina; Bangun, Sempurna; Naibaho, Pio Ranap Tua
International Journal of Civil Engineering and Infrastructure Vol 3, No 2 (2023): IJCEI Volume 3 No. 2
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.3.2.32-39

Abstract

Wood charcoal ash is the result of chemical changes from the burning of wood. Wood charcoal contains silica which is a good binder aggregate for concrete mixtures, it is the same as the function of cement in a concrete mixture. Wood charcoal can also be used as a mixture or addition to the manufacture of reactive concrete. Concrete is a mixture of portland cement, fine aggregate, coarse aggregate and water, with or without additives that form a solid mass. Concrete is prepared from coarse aggregate and fine aggregate. Cement and water interact chemically to bind the aggregate particles into a solid mass (George Winter, 1993). Based on the results of research that has been done, the results obtained on normal concrete of 17.98 Mpa at the age of 7 days and increased at the age of 14 days of 20.73 Mpa, and 28 days of 22.94 Mpa. At the time of normal concrete mixed with wood charcoal ash 3% compressive strength of concrete again increased by 20.43 Mpa at the age of 7 days, but at the age of 14 days of concrete with a mixture of wood charcoal ash increased by 20.82 Mpa and again increased at the age of 28 days by 27.07 Mpa. The decrease continued to occur in concrete with a mixture of wood charcoal ash 8% and 13% at the age of 7 Days, 14 days, and 28 days, the increase in the compressive strength of the optimal concrete is in the concrete mixture of wood charcoal ash 3% at the age of 28 days.
ANALISIS PERHITUNGAN STRUKTUR BUNKER AKSELERATOR ELEKTRON ENERGI TINGGI MENGGUNAKAN ETABS Hutagalung, Jethro Lukito; Naibaho, Pio Ranap Tua; Sembiring, Kristina
Journal of Sustainable Civil Engineering (JOSCE) Vol. 6 No. 02 (2024): JOSCE: Journal of Sustainable Civil Engineering
Publisher : LPPM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47080/josce.v6i02.3611

Abstract

Badan Riset dan Inovasi Nasional (BRIN) sedang mengembangkan Gedung Akselerator Elektron Energi Tinggi (AEET) di Lebak Bulus, Jakarta Selatan, sebagai bagian dari upaya untuk mendukung penelitian dan inovasi ilmiah di Indonesia. Salah satu komponen utama dalam proyek ini adalah pembangunan Bunker yang dirancang untuk memiliki ketahanan tinggi terhadap radiasi dan gempa bumi, dengan mempertimbangkan wilayah Indonesia yang rawan gempa. Desain Bunker ini memperhitungkan percepatan gempa dasar (Peak Ground Acceleration atau PGA) sebesar 0,3g sesuai dengan kondisi geologis setempat. Penelitian ini bertujuan untuk menganalisis dan menghitung ulang struktur kolom dan pelat bunker AEET sesuai dengan Standar Nasional Indonesia (SNI). Metode penelitian yang digunakan meliputi studi literatur untuk memahami teori dan standar yang relevan, pengolahan data lapangan, pemodelan struktur menggunakan software ETABS, analisis gaya dalam, serta perhitungan manual menggunakan Excel untuk memverifikasi hasil pemodelan. Hasil penelitian menunjukkan bahwa struktur kolom dan pelat bunker AEET mampu menahan beban aksial, geser, dan momen yang terjadi selama operasional, serta memenuhi seluruh persyaratan keamanan dan ketahanan gempa sesuai standar SNI. Desain ulang yang dilakukan meningkatkan keamanan struktur dan memastikan operasional yang aman dan efisien dalam jangka panjang. Penelitian ini juga merekomendasikan penggunaan material modern dan penerapan sistem pemantauan struktural secara real-time untuk memastikan keberlanjutan dan keselamatan fasilitas ini di masa depan. Penelitian ini memberikan kontribusi penting dalam pengembangan infrastruktur penelitian di Indonesia, memastikan bahwa fasilitas AEET tidak hanya berteknologi canggih, tetapi juga aman dan tangguh dalam menghadapi kondisi geologi yang menantang.
TIME AND COST MANAGEMENT ANALYSIS OF THE FORMWORK AND REINFORCEMENT WORK (COLUMNS, BEAMS, AND SLABS) FOR THE 2ND FLOOR AMENITIES IN THE OFFICE BUILDING DEVELOPMENT PROJECT OF THE KNOWLEDGE HUB BSD CITY Nosi, Leonardus; Bangun, Sempurna; Sembiring, Kristina; Naibaho, Pio Ranap Tua
International Journal of Civil Engineering and Infrastructure Vol 4, No 2 (2024): IJCEI Volume 4 No. 2
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.4.2.23-36

Abstract

A project is a business activity that is complex, non-routine in nature, has limited time, budget and resources and has its own specifications for the product to be produced. With the existence of several limitations in working on a project, an organization in the project is needed to manage the resources (equipment, budget, and workforce) owned so that they can carry out synchronous activities so that the project objectives can be achieved. In construction projects every building material uses concrete material, which in practice, especially in the last 10-20 years, concrete has been increasingly used. To obtain the planned concrete shape and to harden it, we need formwork or moulds. The Knowledge Hub BSD City office building project is built on an area of 1.1 hectares covering a building area of 54,956 m2 consisting of 11 floors. This location is located on Jalan Raya BSD Barat, Sampora, Cisauk District, Tangerang Regency, Banten Province. The research objective for the analysis of these calculations starts from calculating the duration of each job based on cost and time calculations obtained from existing technical drawing data. The research method used is the calculation of formwork (columns, beams and slabs) through the Microsoft Excel application.
Analisis Waktu pada Pekerjaan Tambahan Proyek Pembangunan Gedung PT. Petrokimia Gresik Nurafifah, Nabilah Mawadah; Dewita, Hikma; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 9 No. 1 (2025)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v9i1.16449

Abstract

The time analysis of the additional work of the PT. Petrokimia Gresik Building Construction project aims to determine the delay and acceleration during the implementation of additional work to meet the SLF (Certificate of Functioning) requirements on the work items of emergency stairs, fire extinguisher, GWT and electrical which have a contract value of Rp 3,556,641,848, - with a planned project completion time of 19 weeks located on Jl. Tanah Abang II no. 63, Central Jakarta, DKI Jakarta. In this study using the Earned Value Concept method, which is a method that can analyze time and provide an overview of conditions at the time of realization which includes indicators in the form of BCWS and BCWP. At the time of the implementation of the additional work, in fifth weeks to twelveth seen from the value of the schedule variant (SV) shows a positive number (+) which means the work is carried out faster than planned. However, the evaluation of week 15 to week 17 seen from the schedule variance value (SV) has a negative value (-) which means there is a delay from the plan schedule at the time of implementation. But the delay did not really affect the project completion time at the end because previously there was an acceleration of work. At the end of the SPI calculation, it has a value of 1 = 1, which means that the work implementation time is in accordance with the planned time of 19 weeks.
Analisis Program Keselamatan dan Kesehatan Kerja (K3) serta Pengaruh terhadap Keberhasilan Proyek Pembangunan Gedung PT. Petrokimia Gresik Zulma, Nabillah; Dewita, Hikma; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 9 No. 1 (2025)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v9i1.16450

Abstract

The Occupational Safety and Health (K3) program is very important in implementing building projects. The possibility of work-related accidents and illnesses is often caused by the contractor's failure to implement the program (K3) as intended. A project can be said to be successful if there are no serious accidents or zero accidents. When implementing a building project, it is important to utilize an effective safety and health management system during construction (SMK3). The aim of this research is to understand SMK3 procedures, determine the impact of implementing SMK3, and determine the main factors that influence the success of PT projects. Petrokimia Gresik regarding building construction. This research is quantitative research using two methods, namely assessment based on Key Performance Indicators (KPI) and data analysis using the multiple linear regression method. The data collection method was through distributing questionnaires and the instrument used was a Likert scale. After conducting an assessment based on the Key Performance Indicator (KPI), the implementation of SMK3 in the PT building construction project. Petrochemicals are in line with targets. Furthermore, the research results show that the influence of occupational safety and health (K3) has a positive impact on achieving PT project objectives. Petrochemicals are affected by safety and health issues which have an impact on better implementation of SMK3. The dominant factor that influences project success based on the variables studied is occupational health.
STRUCTURAL ANALYSIS OF LINAC AND BRACHYTHERAPY BUNKER DESIGN (CASE STUDY: RADEN MATTAHER REGIONAL GENERAL HOSPITAL, JAMBI) Syahroni, Alif Ihsan; Naibaho, Pio Ranap Tua; Sembiring, Kristina
International Journal of Civil Engineering and Infrastructure Vol. 5 No. 1 (2025): IJCEI Volume 5 No. 1
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The LINAC and Brachytherapy bunkers constructed at RSUD Raden Mattaher Jambi are part of a strategic healthcare development initiative by the Jambi Provincial Government. These bunkerstructures possess specialized characteristics to ensure maximum protection against radiationexposure, utilizing thick reinforced concrete and, in some areas, lead-lined layers. RadiationShielding Concrete (RSC), also known as heavyweight concrete, is used for this purpose, typicallyhaving a density greater than 2600 kg/m³. Designed to attenuate gamma rays, X-rays, andneutrons, the effectiveness of RSC depends significantly on its density. Studies indicate thatconcrete with densities between 3012–3820 kg/m³ achieves linear attenuation coefficients (μ)ranging from 0.224 to 0.265 cm⁻¹, demonstrating high shielding capability. During construction,deviations occurred between the Detail Engineering Design (DED) and the actual fieldimplementation (As-Built Drawing or ABD) due to site conditions and safety considerations. Thisstudy aims to analyze the structural differences between DED and ABD. Structural analysis wasconducted using ETABS software to obtain internal forces in the structural elements, followed bymanual verification. Results show that the columns are capable of resisting axial loads andmoments, with reinforcement ratios within the required 1%–6% of gross concrete area (Ag).Variations in internal forces were identified between DED and ABD. In the floor slab analysis, theDED design failed to meet flexural strength requirements (Mu > ϕMn), while the ABD designachieved sufficient nominal capacity (Mu < ϕMn), enhancing the structure’s performance underservice loads. Keywords: Bunker, Structural Analysis, LINAC, Brachytherapy, Radiation Shielding Concrete
Analisis Perhitungan Rancangan Bangunan Gudang (Studi Kasus: Gudang Konsolidasi Block C.05 SBU Marunda – Jakarta) (In Press) S, Daniel; Tua Naibaho, Pio Ranap; Sembiring, Kristina
Menara: Jurnal Teknik Sipil Vol. 21 No. 1 (2026): Menara : Jurnal Teknik Sipil
Publisher : Teknik Sipil, Fakultas Teknik Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jmenara.v21i1.56496

Abstract

Dalam perencanaan pembangunan bangunan harus melalui tahapan-tahapan tertentu seperti, pemilihan material, besi baja, beton, kayu. Material baja umumnya digunakan sebagai tiang penyangga utama yang biasa disebut kolom dan balok. Penggunaan struktur baja pada sebuah bangunan saat ini sedang banyak diminati oleh berbagai konsumen, terlebih pada pembangunan gudang. Penelitian ini akan menganalisis pemodelan struktur Gudang Konsolidasi Marunda Jakarta menggunakan software ETABS v.21 dan secara manual mengecek gaya dalam yang bekerja untuk mengetahui kapasitas pada bagian yang ditinjau yaitu kolom baja profil HB- 350.350.12.19 dan balok baja profil IWF-250.125.6.9 sesuai SNI 1726:2019, SNI 1727:2020, SNI 1729:2020, dan SNI 2847:2019. Dari hasil analisa didapatkan kolom HB-350.350.12.19, tidak melebihi nilai kekuatan nominal yang artinya profil aman. Dimana ϕMn ≥ Mu 537,408 kN.m ≥ 43,6050 kN.m profil aman terhadap gaya momen ultimit, dan ϕPn ≥ Pu 3600,54 kN ≥ 265,02 kN profil aman terhadap gaya aksial. Dan untuk profil balok IWF-250.125.6.9, tidak melebihi nilai kekuatan nominal yang artinya profil aman. Dimana ϕMn ≥ Mu 76,0758 kN.m ≥ 3,4866 kN.m profil aman terhadap gaya momen ultimit, ϕVn ≥ Vu 190,08 kN ≥ 2,6884 kN profil aman terhadap gaya geser dan lendutan yang terjadi masih dibawah lendutan ijin 0,608 mm < 16,67 mm.
Analisis Biaya dan Waktu Percepatan Proyek Pembangunan Rusun At-Tanwir Cianjur dengan Penambahan Jam Kerja Menggunakan Metode TCTO Nurhikmah, Salmah; Dewita, Hikma; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 9 No. 2 (2025)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v9i2.17785

Abstract

 The At-Tanwir Foundation’s Flats Construction Project at Cianjur Regency, West Java; aims to provide housing for students and promote education. Therefore, expediting the construction process for immediate utilization is essential to meet the housing needs. One alternative for expediting the project is to increase working hours using the time-cost trade-off method. The purpose of acceleration is to anticipate delays in the project and shorten the project implementation time. This study uses data such as Project RAB, Plan S Curve, a List of Unit Prices of Materials, Tools, and Labor, and an Analysis of Unit Prices of Work. Microsoft Project 2019 software assists in data processing to identify critical paths. After accelerating work on critical activities, the analysis showed that by adding 3 hours of overtime, the project duration can be reduced to 100 working days, which is 15% faster than the normal duration of 119 working days. The optimal cost for this duration is IDR 808,750,195.52, which is 0,69% lower than the normal cost of IDR 803,164,902.33, with a cost difference of IDR 5,585,293.19.
Co-Authors Abdul Ghofar Al Hasyir, Muhammad Humaam Arisyi, Luthfan Azhar, Moh. Bambang Priyambodo, Bambang Bambang Sunarto Bangun, Sempurna Dewita, Hikma Hutagalung, Jethro Lukito Laksono, Arvidya Esta Lisa, Ulfa Sama Nabiho, Pio Ranap Tua Nosi, Leonardus Nurafifah, Nabilah Mawadah Nurhayati, Yayah Nurhikmah, Salmah Pio Ranap Tua Naibaho S, Daniel Sanrach, Handa Dwi Soenarto, Bambang Sri Maharani Syahroni, Alif Ihsan William, Martin Richardo Zulma, Nabillah