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Studi Perbandingan Kekuatan Profil IWF, Hexagonal Beam dan Octagonal Beam dengan Perhitungan Manual dan Metode Elemen Hingga: Comparative Study of IWF Profile Strength, Hexagonal Beam and Octagonal Beam with Manual Calculations and Finite Element Method Zarmihan, Rezaldi Pramanda; Pratiwi, Vitta; Krisnadi, Sutedjo
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 11 No. 2 (2022): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v11i2.165

Abstract

A castellated beam is formed from the IWF body profile cutting pattern, and the cuts are then adjusted between the pieces and then welded to put them back together. The advantage of modifying the IWF profile into a castellated beam is that it can increase the moment of inertia of the section (Ix), and this increase affects the bending capacity of the castellated beam profile and the ability of the profile to withstand loads. However, these profile modifications have limitations that are used to minimize the occurrence of extreme failures, and one of the limitations is that the modified profile may not exceed 50% of the height increase from the initial profile height. In this study, the profile capabilities of IWF, Hexagonal Beam, and Octagonal Beam will be compared with a total of 3 models of centralized loads that can be carried. In this study, two methods will be used, namely manual calculation and finite element method. From the results of the analysis that has been carried out with both methods, it can be seen that the effect of modifying the IWF profile into hexagonal beams and octagonal beams can increase the load capacity of the profiles. However, the highest profile capability increase occurred in model 1 or IWF profile 150x75x5x7, which was modified to model 2 or hexagonal beam 220x75x5x7. The increase in the profile was 34.83% for manual method calculations and finite element method calculations, an increase of 12.15 %. The highest comparison between the manual calculation method and the finite element method occurs in the hexagonal profile beam measuring 240x75x5x7 with a difference of 21.39%. Based on the research that has been done, it can be concluded from the three profiles that it is better if the profile used is model 2.
The Effect of Socialization on the Implementation of the MBKM Curriculum Policy for Civil Engineering Students at Universitas Komputer Indonesia Pratiwi, VItta
JISIP: Jurnal Ilmu Sosial dan Pendidikan Vol 6, No 3 (2022): JISIP (Jurnal Ilmu Sosial dan Pendidikan)
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/jisip.v6i3.3270

Abstract

The goal of this study was to see how socialization affected the implementation of the "Merdeka Belajar Kampus Merdeka" (MBKM, Independent Campus Free to Learn) policy for students in the Engineering Department at Universitas Komputer Indonesia. The data from the SPADA DIKTI questionnaire results were mapped using quantitative methods and SWOT analysis with survey respondents from the Civil Engineering Department at Universitas Komputer Indonesia. The study's findings should provide an overview of the effect of socialization on student interest in participating in the MBKM Program. The MBKM questionnaire results show that respondents see a positive improvement in the MBKM policy, but the policy's weakness is the dissemination of MBKM information, which is still very limited. Poor socialization indicates that students' interest in participating is very low, as evidenced by the questionnaire results, which show that there is a small relationship between MBKM knowledge (63 percent) and student interest in the mediocre MBKM program (71.2 percent ). Although students are aware that MBKM provides benefits for increasing competence, soft skills, and benefits for the post-graduate period, threats such as funding concerns cause students to decline participation in the MBKM Program. Effective socialization is critical; socialization of MBKM implementation should use student-favored social media channels, because social media channels can influence the current generation more than information on the official website or channel of Higher Education.
Perencanaan Prasarana Dan Sarana Sistem Pengendalian Banjir Kota Administrasi Jakarta Pusat Pratiwi, Vitta; Rahajoeningroem, Tri
Indonesian Community Service and Empowerment Journal (IComSE) Vol. 1 No. 1 (2020): Indonesian Community Service and Empowerment Journal (IComSE)
Publisher : Divisi Pengabdian dan Pemberdayaan Masyarakat (DP2M) UNIKOM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1296.128 KB) | DOI: 10.34010/icomse.v1i1.2794

Abstract

ABSTRACT The effort to countermeasure flood and puddle in DKI Jakarta is one of the priority programs implemented by the Government in order to create Jakarta as the capital of the Republic of Indonesia that is comfortable to carry out social, cultural and economic activities, thus giving a positive impact to the economy of DKI Jakarta and Indonesia. In the effort to handle the puddle and flood problems above the need of infrastructure planning and flood control means especially in central Jakarta, so as to reduce the points of the puddle and flooding and the impact caused. With this activity is expected to produce a design of infrastructure development and a means of quality flood control that means that the development can be felt by all components of the community. This activity is conducted in two areas namely Petamburan (Jati Pinggir) and Kalibaru Timur. This methodology of implementation of activities consist of preparation and preliminary stages, field survey and data analysis as well as the formulation of channel design concept as well as simulated of drainage system and flood control modeling. The analysis of precipitation frequencies of the plan uses a 5-year anniversary with the Gumbell type 1 method. The problems in the Petamburan region are the basic elevation of the irregular channels, the number of basins in the middle of the channel, the capacity of channels that have been unable to receive debit plans and elevation of the land is generally lower than the elevation of the disposal channel Broad catchment area of 21.50 Ha, assuming the flow coefficient of 0.85 and the rainfall intensity is used at 5 years of 225.7 mm, resulting in flood discharge calculation of Q = 5.73 m3/second and plus existing pump 0.75 m3/sec. Handling of normalization with base tilt to 0.0028. Redimensioning is changed to uniform i.e. B = 1.20 m; H = 1.20 m. As for East Kalibaru region the thing that concern is the narrowing of the channel in the downstream. The Tc value is 121.26 minutes, I of 38.67 mm/h and Q = 8.47 m3/sec. Specification of the pump used is a submersible type axial flow with a capacity of 2 m3/sec. Key words: Flood, rainfall, discharge, intensity, pump ABSTRAK Upaya penanggulangan banjir dan genangan di wilayah DKI Jakarta merupakan salah satu program prioritas yang dilaksanakan pemerintah dalam rangka menciptakan Jakarta sebagai ibukota Negara Republik Indonesia yang nyaman untuk melaksanakan kegiatan sosial, budaya maupun ekonomi, sehingga memberi dampak yang positif bagi perekonomian Provinsi DKI Jakarta maupun Indonesia. Dalam upaya penanganan permasalahan genangan dan banjir di atas dibutuhkan perencanaan prasarana dan sarana pengendali banjir khususnya di Jakarta Pusat, sehingga dapat mengurangi titik-titik genangan dan banjir serta dampak yang ditimbulkan. Dengan adanya kegiatan ini diharapkan dapat menghasilkan suatu desain pembangunan prasarana dan sarana pengendali banjir yang berkualitas yaitu yang bermakna bahwa pembangunan tersebut dapat dirasakan oleh seluruh komponen masyarakat. Pada kegiatan ini dilakukan di dua wilayah yaitu Petamburan (Jati Pinggir) dan Kalibaru Timur. Metodologi pelaksanaan kegiatan ini terdiri atas tahap persiapan dan pendahuluan, survey lapangan dan analisis data serta penyusunan konsep desain saluran serta simulasi pemodelan sistem drainase dan pengendalian banjir. Analisis frekuensi curah hujan rencana menggunakan kala ulang 5 tahun dengan metode Gumbell tipe 1. Permasalahan di wilayah Petamburan adalah elevasi dasar saluran tidak beraturan, banyaknya cekungan di tengah saluran, kapasitas saluran yang sudah tidak mampu menerima debit rencana dan elevasi lahan umumnya lebih rendah daripada elevasi saluran pembuang. Luas catchment area seluas 21.50 Ha, dengan asumsi koefisien pengaliran sebesar 0.85 dan intensitas curah hujan digunakan kala ulang 5 tahun sebesar 225.7 mm, sehingga didapat perhitungan debit banjir sebesar Q = 5.73 m3/detik dan ditambah pompa eksisting 0.75 m3/detik. Dilakukan penanganan normalisasi dengan kemiringan dasar menjadi 0.0028. Redimensi diubah menjadi seragam yaitu B = 1.20 m; H = 1.20 m. Sedangkan untuk wilayah Kalibaru Timur hal yang menjadi perhatian adalah penyempitan saluran di hilir. Nilai Tc adalah 121.26 menit, I sebesar 38.67 mm/jam dan Q = 8.47 m3/detik. Spesifikasi pompa yang dipergunakan merupakan tipe submersible axial flow dengan kapasitas 2 m3/detik. Kata kunci: Banjir, curah hujan, debit, intensitas, pompa
COMPARISON OF MAINTENANCE OF AUTOMATIC AND CONVENTIONAL DRIP IRRIGATION SYSTEMS ON HORENSO CROPS (Greenhouse Keboenumiku Cibodas-Lembang): Perbandingan Maintenance Metode Sistem Irigasi Tetes Otomatis Dan Metode Konvesional Pada Tanaman Bayam Jepang/Horenso Ibnu Isa, Fatwa; Pratiwi, Vitta
Menara: Jurnal Teknik Sipil Vol. 19 No. 1 (2024): 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.v19i1.38965

Abstract

Drip irrigation systems are installed in drylands that can provide stable water so that water delivery is better. With the development of technology drip irrigation systems can be controlled automatically which includes electronic devices to command the state of a system. This research uses 2 methods, namely the conventional method and the automatic drip irrigation method which aims to determine the need for water and fertilizer in Japanese spinach/horenso plants and compare maintenance from cost, time and human labor. The results of the study of water released using conventional methods amounted to 29,228 liters and automatic drip irrigation method amounted to 10,000 liters. The difference of 19,228 liters with a percentage of 66.78%, it can be interpreted that the automatic drip irrigation method is more efficient. The fertilizer spent using the conventional method was 20,120 liters and the automatic drip irrigation method was 9,000. The difference of 11,120 liters with a percentage of 55.26%, it can be interpreted that the automatic drip irrigation method is more efficient. The need for water and fertilizer using the automatic drip irrigation system method is more efficient and effective because in giving it not too much is wasted than using conventional methods.
Identifikasi Penyebab Banjir di Kawasan Cicaheum Kota Bandung - Jawa Barat Sasmita, Firza Sastra; Pratiwi, Vitta
CRANE: Civil Engineering Research Journal Vol 5 No 1 (2024): CRANE
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Ilmu Komputer, Universitas Komputer Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34010/crane.v5i1.10184

Abstract

Abstrak. Wilayah di Indonesia selalu mengalami banjir dan air menggenang setiap tahunnya ketika datang musim hujan, wilayah perkotaan paling utama. Banjir serta menggenangnya air sering terjadi di Kota Bandung, karena faktor curah hujan tinggi, berubahnya area tangkapan air di sekitar kota bandung yang berubah jadi suatu bangunan rumah masyarakat dan sejenisnya.. Berdasarkan opini diatas, telah dilakukan penelitian untuk mengetahui penyebab banjir yang terjadi di wilayah Cicaheum Kota Bandung, apakah akibat perubahan alih fungsi lahan atau memang intensitas hujan yang terjadi di kawasan tersebut tinggi, dengan studi kasus sungai dan DAS Cipamokolan. Pada pnelitian ini, analisis hidrologi menggunakan data curah hujan periode 25 tahun, untuk mendapatkan debit banjir. Analisis debit banjir rencana menggunakan Metode Rasional. Untuk analisis tata guna lahan sendiri menggunakan software Arc-GIS. Berdasarkan hasil analisis, pada tahun 2006 presentase luas lahan untuk Permukiman 8%, Ladang/Tegalan 92%. Sedangkan pada tahun 2018 presentase luas lahan untuk Permukiman 29%, Hutan Tanaman 1%, dan Pertanian Lahan Kering 70%. Berdasarkan hasil analisis, alih fungsi area terjadi meningkatnya koeffisien air di permukaan, C2006 = 0.616132507 , naik jadi C2018 = 0.657100383. Sebagian besar dari alternative perhitungan yang ada menunjukkan Intensitas Hujan sangat berpengaruh terhadap banjir cicaheum dengan perubahan sebesar 21%. Jumlah debit aliran sungai 2018 lebih tinggi dari 2006. Kata kunci: Banjir, Intensitas Hujan, Tata Guna Lahan, Arc-GIS, Debit Banjir
KAJIAN MODEL FISIK RAMBATAN BANJIR DI SEKITAR BANGUNAN AKIBAT DAMBREAK KONFIGURASI 4 BANGUNAN DAN BANGUNAN MIRING Pratiwi, Vitta
Majalah Ilmiah UNIKOM Vol. 12 No. 1 (2014): Majalah Ilmiah Unikom
Publisher : Universitas Komputer Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1691.533 KB)

Abstract

Model fisik mengenai rambatan banjir disekitar bangunan akibat dam-break merupakan hal yang menarik untuk dikaji, karena kerusakan yang ditimbulkan oleh dam-break berhubungan dengan hilangnya nyawa manusia dan kerusakan infrastruktur yang mendukung kehidupan manusia. Pembuatan model fisik di laboratorium diharapkan dapat memberikan gambaran langsung mengenai rambatan banjir di sekitar bangunan akibat dam-break. Model fisik rambatan banjir ini akan sangat berguna untuk menilai layak atau tidaknya situ/embung dengan bangunan yang padat di sekitarnya. Penilaian ini dapat digunakan se-bagai pertimbangan untuk merancang ulang situ/embung sebagai bagian dari mitigasi bencana.Eksperimen yang dikembangkan dalam penelitian ini berupa model fisik ramba-tan banjir akibat dam-break di sekitar bangunan. Untuk mendapatkan simulasi dam-break, digunakan pintu (gate) yang dibuka tiba-tiba, sedangkan model ban-gunan disimulasikan dengan balok kayu yang ditempatkan 3 m di depan pintu. Simulasi dilakukan dengan dua konfigurasi bangunan yaitu: 4 bangunan perse-gi sejajar dengan posisi tegak dan 1 bangunan persegi panjang dengan posisi miring, yang semuanya di running dengan menggunakan debit tetap.