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All Journal Journal of Nutrition College The Indonesian Biomedical Journal Universa Medicina Jurnal Medik Veteriner Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan JMTS: Jurnal Mitra Teknik Sipil Infotech: Journal of Technology Information Jurnal Teknik Sipil Cendekia (JTSC) Jurnal Abdimas Kesehatan Jurnal Farmasi Sains dan Terapan (Journal of Pharmacy Science and Practice)
Wijaya, Hendy
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Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Environmental Science Health Professions Immunology & microbiology Medicine & Pharmacology Nursing Public Health Veterinary

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PREDIKSI PENURUNAN BANGUNAN TINGGI YANG BERLOKASI DI JAKARTA UTARA Susiyanti, Meli; Wijaya, Hendy; Iskandar, Ali
JMTS: Jurnal Mitra Teknik Sipil Volume 8, Nomor 3, Agustus 2025
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v8i3.20389

Abstract

Buildings can experience land subsidence caused by immediate settlement due to loading and consolidation. Land subsidence is a natural phenomenon and requires attention in areas around the coast or alluvial plains because the soil is very soft. Pile foundations are part of the construction that functions to transfer the load from the construction above to the hard soil layer that is very deep. This study discusses the settlement of the high-rise building studied located in the North Jakarta area. Data collection of soil, buildings and foundations was carried out and then analyzed using a 3D analysis program (finite difference method). The analysis was carried out to determine the amount of settlement that will occur and how long the settlement will continue. The settlement of the pile group foundation in this study was caused by elastic compression of the piles and consolidation settlement. The time required to reach 90% consolidation was 110961 days or 308 years from the beginning of the project period. The settlement that occurred when the building was completed was 1231.54 mm, during the 100-year project period was 2214.65 mm, and the largest settlement was when the soil was 90% consolidated at 2676.11 mm. Abstrak Bangunan dapat mengalami penurunan tanah yang disebabkan oleh penurunan segera akibat pembebanan dan konsolidasi. Penurunan tanah merupakan suatu fenomena alam dan perlu perhatian di daerah sekitar pantai atau dataran alluvial karena tanahnya sangat lunak. Fondasi tiang pancang merupakan bagian konstruksi yang berfungsi untuk mentransfer beban dari konstruksi di atasnya ke lapisan tanah keras yang letaknya sangat dalam. Penelitian ini membahas mengenai penurunan bangunan tinggi yang diteliti terletak di kawasan Jakarta Utara. Pengumpulan data tanah, bangunan dan fondasi dilakukan untuk kemudian dianalisis dengan bantuan program analisis 3D (metode beda hingga). Analisis dilakukan untuk mencari besarnya penurunan yang akan terjadi dan sampai kapan penurunan terus terjadi. Penurunan fondasi kelompok tiang dalam penelitian ini diakibatkan oleh kompresi elastis tiang dan penurunan konsolidasi. Waktu yang dibutuhkan untuk mencapai konsolidasi 90% adalah 110961 hari atau 308 tahun sejak awal masa proyek. Penurunan yang terjadi pada saat bangunan selesai adalah sebesar 1231,54 mm, pada saat masa proyek 100 tahun sebesar 2214,65 mm, dan penurunan terbesar yaitu pada saat tanah terkonsolidasi 90% sebesar 2676,11 mm.
PARAMETER IDENTIFICATION OF Cc IN SOFT SOIL THROUGH BACK ANALYSIS OF VACUUM PRELOADING Gunawan, Mikael Dylan; Wijaya, Hendy; Iskandar, Ali
JMTS: Jurnal Mitra Teknik Sipil Volume 8, Nomor 3, Agustus 2025
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v8i3.34141

Abstract

The soft soil problem is one of the most common problems in the geotechnical field because the consolidation process in these soils takes a long time. One of the main problems that will be discussed in this research is the high compressibility of soft soil. The project reviewed in this research has clay soil characteristics with soft consistency so that the soil improvement method carried out in this project is vacuum preloading. In this research, a back analysis will be carried out based on the monitoring data available in this project where the modeling to be used is modeling with a finite element approach. The purpose of this back analysis is to obtain appropriate parameters based on monitoring data, the parameters adjusted in the back analysis are consolidation parameters in the form of Cc, Cs, e0, kx, and ky. In this study, it only focuses on one of the consolidation parameters obtained from back analysis, namely the Cc parameter where the purpose of taking the Cc parameter in this study is to measure the high or low compressibility that occurs in soft soil in the project in this study. Based on the results of the back analysis obtained, the Cc value obtained from the 3 settlement plates ranges from 0.7 - 0.75 where the value indicates that the soft soil has high compressibility. Abstrak Permasalahan tanah lunak merupakan salah satu masalah yang sering terjadi pada bidang geoteknik karena proses konsolidasi pada tanah tersebut memakan waktu yang lama. Salah satu permasalahan utama yang akan dibahas pada penelitian ini adalah kompresibilitas yang tinggi pada tanah lunak. Proyek yang ditinjau pada penelitian ini memiliki karakteristik tanah lempung dengan konsistensi lunak sehingga metode perbaikan tanah yang dilakukan pada proyek ini adalah vacuum preloading. Pada penelitian ini akan dilakukan back analysis berdasarkan data monitoring yang tersedia pada proyek ini dimana pemodelan yang akan digunakan berupa pemodelan dengan pendekatan finite element. Tujuan dari back analysis ini adalah untuk mendapatkan parameter yang sesuai berdasarkan data monitoring, parameter yang disesuaikan pada back analysis yaitu parameter konsolidasi berupa Cc, Cs, e0, kx, dan ky. Pada penelitian ini, hanya berfokus pada salah satu parameter konsolidasi yang diperoleh dari back analysis yaitu parameter Cc dimana tujuan pengambilan parameter Cc pada penelitian ini adalah untuk mengukur tinggi atau rendahnya kompresibilitas yang terjadi pada tanah lunak pada proyek dalam penelitian ini. Berdasarkan hasil back analysis yang diperoleh, nilai Cc yang diperoleh dari 3 settlement plate berkisar antara 0,7 – 0,75 dimana nilai tersebut menunjukkan bahwa tanah lunak memiliki kompresibilitas yang tinggi.
STATISTICAL CORRECTION OF A DYNAMIC PILE BEARING CAPACITY FORMULA BASED ON PDA DATA Angelina, Sherlin; Wijaya, Hendy; Iskandar, Ali; Johan, Agus; Kawanda, Aksan; Purnomo, Daniel Tri
JMTS: Jurnal Mitra Teknik Sipil Volume 8, Nomor 3, Agustus 2025
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v8i3.34184

Abstract

The calculation of pile bearing capacity using a dynamic formula is considered a practical approach for evaluating the capacity of foundation piles. However, its results are often questioned when compared to the CAPWAP analysis outcomes derived from PDA testing. This study aims to assess the accuracy of the dynamic formula, develop a correction model using a statistical approach in the form MLR, and evaluate the effectiveness of the resulting correction model in predicting pile bearing capacity. A total of 84 pile datasets were utilized in this research, comprising various pile dimensions and PDA-derived parameters, including the maximum energy transferred to the pile (EMX), permanent pile settlement (S = DFN), and elastic settlement (C = DMX – DFN). The analysis results indicated that the dynamic formula could be corrected using the MLR approach. The correction model produced multiplier coefficients of 1.09 for parameter S and 0.67 for parameter C, with a coefficient of determination of 0.96 and a MAPE value of 19.21%, which represents the average deviation of the predicted results from the actual values and falls into the accurate category based on Lewis’ classification. The model is deemed sufficiently reliable for use as an alternative method in the preliminary evaluation of pile bearing capacity. Abstrak Perhitungan daya dukung tiang menggunakan formula dinamik merupakan pendekatan praktis dalam mengevaluasi kapasitas tiang fondasi. Namun, hasil perhitungannya kerap diragukan jika dibandingkan dengan hasil analisis CAPWAP dari uji PDA. Penelitian ini bertujuan untuk mengevaluasi akurasi formula dinamik, mengembangkan model koreksi dengan pendekatan statistik berupa MLR, serta menilai efektivitas model koreksi yang dihasilkan dalam memprediksi daya dukung tiang. Pada penelitian ini digunakan 84 data tiang dengan variasi dimensi tiang dan parameter dari uji PDA yang berupa energi maksimum yang tertransfer ke tiang (EMX), penurunan permanen tiang (S = DFN), dan penurunan elastis tiang (C = DMX – DFN). Hasil analisis menunjukkan bahwa formula dinamik dapat dikoreksi melalui pendekatan MLR. Model koreksi menghasilkan koefisien pengali untuk parameter S sebesar 1,09 dan C sebesar 0,67, serta memiliki koefisien determinasi sebesar 0,96 dan nilai MAPE yang menunjukkan rata-rata deviasi hasil prediksi terhadap aktual sebesar 19,21%, yang termasuk dalam kategori akurat menurut klasifikasi Lewis. Model ini dinilai cukup andal untuk digunakan sebagai pendekatan alternatif dalam tahap evaluasi awal daya dukung tiang.
ANALYSIS OF LOAD TRANSFER PLATFORM THICKNESS ON LOAD TRANSFER EFFECTIVENESS AND ROAD STABILITY IN SOFT SOIL Andrawan, Andrawan; Wijaya, Hendy; Iskandar, Ali; Johan, Albert
JMTS: Jurnal Mitra Teknik Sipil Volume 8, Nomor 3, Agustus 2025
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v8i3.34188

Abstract

Reinforcement of road embankments on soft soils is a common challenge in infrastructure projects, especially in conditions of low bearing capacity and large settlement potential. One widely used solution is the pile embankment system with the addition of granular Load Transfer Platform. This study aims to numerically evaluate the effect of variations in LTP quality and thickness on system performance. Modeling was conducted using the two-dimensional finite element method, with variations in CBR values of 40% and 45%, and LTP thicknesses of 1 m, 1.5 m, and 2 m. The parameters analyzed include the amount of embankment settlement, slope safety factor, axial force on piles, and visualization of arching effect. The results showed that increasing the quality and thickness of the LTP was able to reduce embankment settlement and increase the factor of safety, especially under short-term conditions. The axial force on the piles also increased as the stiffness of the LTP increased, although at a certain thickness it was thought that there was more optimal force attenuation. These findings indicate the importance of appropriate LTP configuration in the design of soft soil reinforcement systems. Abstrak Perkuatan timbunan jalan di atas tanah lunak merupakan tantangan umum dalam proyek infrastruktur, khususnya pada kondisi daya dukung rendah dan potensi penurunan yang besar. Salah satu solusi yang banyak digunakan adalah sistem pile embankment dengan penambahan load transfer platform (LTP) berbahan granular. Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi kualitas dan ketebalan LTP terhadap kinerja sistem secara numerik. Pemodelan dilakukan menggunakan metode elemen hingga dua dimensi, dengan variasi nilai CBR sebesar 40% dan 45%, serta ketebalan LTP 1 m, 1,5 m, dan 2 m. Parameter yang dianalisis meliputi besarnya penurunan timbunan, faktor keamanan lereng, gaya aksial pada tiang pancang, serta visualisasi arching effect. Hasil penelitian menunjukkan bahwa peningkatan kualitas dan ketebalan LTP mampu menurunkan penurunan timbunan dan meningkatkan faktor keamanan, khususnya pada kondisi jangka pendek. Gaya aksial pada tiang juga meningkat seiring peningkatan kekakuan LTP, meskipun pada ketebalan tertentu diduga terjadi peredaman gaya yang lebih optimal. Temuan ini menunjukkan pentingnya konfigurasi LTP yang tepat dalam desain sistem perkuatan tanah lunak.
Optimized RT-qPCR Detection of Hepatic Lipopolysaccharide-Binding Protein in Diet-Induced Obese Mice Tjahjono, Yudy; Wedharga, I Gede Putu Adhi; Novita, Bernadette Dian; Tahalele, Paul; Wijaya, Hendy; Soediono, Endang Isbandiati; Hendrata, Adi Pramono; Dewi, Sianty; Wijaya, Sumi; Ervina, Martha; Kuncorojakti, Suryo
Jurnal Medik Veteriner Vol. 8 No. 2 (2025): October
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jmv.vol8.iss2.2025.308-317

Abstract

High-throughput RT-qPCR results on hepatic lipopolysaccharide-binding protein (LBP) expression in obese subjects are essential, as they reveal the endotoxin’s role in the development of obesity and non-communicable disease (NCD). This study aimed to optimize RT-qPCR detection of LBP in diet-induced obese mice. This study primarily focused on addressing high variability through reference gene normalization. A total of six male C57BL/6 mice aged 6 weeks were randomly allocated into two dietary treatments (n = 3), consisting of mice fed with the standard chow diet (SCD group) and mice fed with the high-fat and high sucrose diet (HFHS group) ad libitum for 8 weeks. Relative quantification strategies involving the standard 2-ΔΔCt method (calibrator as mean) and the modified 2-ΔΔCt method (calibrator as individual sample-matched biological replicates) were compared in terms of their variability. Obesity was successfully induced in the HFHS treatment group, as indicated by significantly higher body weight, calorie intake, and LBP relative expressions compared to the SCD group. In addition, a sample-specific calibrator approach using the modified 2-ΔΔCt method resulted in lower variability in relative gene expression levels. A modified 2-ΔΔCt method, which utilizes a sample-specific calibrator to counteract sample-specific variability, was successfully employed to address high variability in RT-qPCR results.
Deteksi populasi Cd3+Cd4+Cd25+Foxp3+ T-regulator pada Limpa Mencit Galur Balb/c dan Swiss-webster yang Mudah dan Cepat dengan Metode Flow Cytometry Tjahjono, Yudy; Wijaya, Hendy; Esar, Senny Yesery; Caroline, Caroline; Jafet, Nico; Kusuma, I Made Andika Bara; Chrisantia, Oryza; Bhendy, Maria Theresia Primadewy; Palpialy, Sindi Siska; Soehadi, Shellin; Wilianto, Yufita Ratnasari
Jurnal Farmasi Sains dan Terapan (Journal of Pharmacy Science and Practice) Vol. 9 No. 2 (2022): October
Publisher : Faculty of Pharmacy, Widya Mandala Surabaya Catholic University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/jfst.v9i2.4079

Abstract

Sel T-regulator (Treg) memainkan peran kunci dalam mengendalikan autoimunitas, respon alergi, peradangan, dan respons terhadap infeksi. Sel T Cd4+ yang secara konstitutif mengekspresikan Cd25 dan protein forkhead 3 (Foxp3; yaitu, Cd3+Cd4+Cd25+Foxp3+) atau disebut juga sebagai Treg fungsional, telah terbukti memainkan peran utama dalam pemeliharaan toleransi dan homeostasis imun, sehingga deteksi Treg fungsional sangat penting dilakukan sebagai salah satu parameter imunomodulasi. Penelitian ini bertujuan untuk mendeteksi populasi sel Treg (Cd3+Cd4+Cd25+Foxp3+) pada organ limpa mencit galur Balb/c dan Swiss-webster dengan menggunakan metode yang mudah, cepat, serta terjangkau. Metode deteksi sel Treg dilakukan dengan cara isolasi organ limpa mencit Balb/c dan Swiss-webster kemudian dilakukan preparasi dan deteksi sel menggunakan instrumen flow cytometry. Hasil populasi sel Treg yang didapatkan berturut-turut pada mencit Balb/c dan Swiss-webster adalah 2,02 ± 0,36% dan 3,14 ± 1,64% dari total populasi yang dideteksi dengan hanya membutuhkan waktu 145 menit sejak pembedahan. Berdasarkan hasil tersebut dapat disimpulkan bahwa pengamatan populasi sel Treg pada splenosit mencit galur Balb/c dan Swiss-webster dengan flow cytometry dapat dilakukan dengan mudah dan praktis dengan pewarnaan kombinasi antibodi yang tertera pada manuskrip ini. Selain itu, metode pewarnaan yang tertera dapat digunakan sebagai salah satu acuan untuk mendeteksi imunomodulator pada berbagai model hewan coba yang menggunakan mencit galur Balb/c dan Swiss-webster, khususnya yang berhubungan dengan populasi sel Treg.
Modified High-Fat High-Sucrose Diet Promotes Obesity and Alters Colonic Cytokines Novita, Bernadette Dian; Wedharga, I Gede Putu Adhi; Tjahjono, Yudy; Wijaya, Hendy; Theodora, Imelda; Ervina, Martha; Wilianto, Yufita Ratnasari; Dewi, Sianty; Parengkuan, Irene Lingkan; Herjunianto, Herjunianto; Ghasani, Sabrina Maria; Limantoro, Michael Christian; Jaya, Ferdinand Wiliam
The Indonesian Biomedical Journal Vol 17, No 5 (2025)
Publisher : The Prodia Education and Research Institute (PERI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18585/inabj.v17i5.3807

Abstract

BACKGROUND: Western dietary patterns are often associated with increasing non-communicable diseases, including inflammatory bowel disease (IBD). In experimental models, a high-fat high-sucrose (HFHS) diet is used to mimic metabolic and inflammatory effects of such diets, however the data regarding colonic inflammation in Indonesia remain limited. Therefore, this study was conducted evaluated the impact of HFHS feeding on colonic interleukin (IL)-6, IL-10 expression, and the IL-6/IL-10 ratio.METHODS: Six weeks old male C57BL/6 mice were randomly assigned to a normal fat diet (NFD) or HFHS diet group and fed ad libitum for 8 weeks. Colonic tissues were collected, and IL-6 and IL-10 expression was analyzed by immunohistochemistry.RESULTS: HFHS-fed mice showed significant increases in body weight (increased by 22.44%, p=0.0047) and caloric intake (increased by 125.17%, p=0.0000), confirming obesity induction. Colitis was also evident, with higher histological colitis scores (p=0.0072). However, colonic IL-6 (increased by 9.12%, p=0.1236), IL-10 (increased by 1.49%, p=0.8013), and the IL-6/IL-10 ratio (increased by 7.38%, p=0.4000) showed no significant differences compared to NFD.CONCLUSION: In C57BL/6 mice, an 8-week modified HFHS diet induced obesity, increased caloric intake, and mucosal injury, but did not significantly alter colonic IL-6, IL-10, or their ratio. This suggests preserved mucosal immune homeostasis consistent with an early compensatory phase rather than overt cytokine-driven inflammation. Longer or more intensive exposure may disrupt this balance, highlighting the need for further studies to define the temporal threshold and clarify immune microbiome interactions in colitis progression.KEYWORDS: high-fat high-sucrose diet, colon inflammation, IL-6, IL-10, obesity mice
Pelatihan Pembuatan Water Kefir sebagai Minuman Probiotik Caroline, Caroline; Ervina, Martha; Hadinugroho, Wuryanto; Esar, Senny Yesery; Wijaya, Hendy; Tjahjono, Yudi; Handayani, Yuliastuti Ika; Sutedja, Anita Maya
Jurnal Abdimas Kesehatan (JAK) Vol. 6 No. 2 (2024): Juni
Publisher : Universitas Baiturrahim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36565/jak.v6i2.620

Abstract

Christ the King of Surabaya Parish through the Socio-Economic Development Section (PSE) in collaboration with Widya Mandala Catholic University Surabaya, was committed to assisting the Indonesian government's program in terms of improving the post-pandemic family economy through training in making health drinks from herbal ingredients, namely water kefir, which has been used as a probiotic drink. The training participants were underprivileged families in the Parish of Christ the King Surabaya. The training was carried out for 1 day with presentation of material by the team, training implementation and training evaluation by filling out pre-tests, post-tests and questionnaires as well as 30 days of assistance for participants who were interested in developing products to improve their economy. The results of the training show high enthusiasm from the participants, an increase in the knowledge of the participants which was marked by an increase in the value of the posttest compared to the pretest and the desire of the participants to produce and market products to improve the family economy
ANALISIS PERBANDINGAN PENURUNAN TERHADAP DAYA DUKUNG FONDASI TIANG PADA TANAH EKSPANSIF DI KARAWANG JAWA BARAT Lai, Jason Lai Wijaya; Wijaya, Hendy; Yuwono, Amelia
JMTS: Jurnal Mitra Teknik Sipil Volume 6, Nomor 4, November 2023
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v6i4.24694

Abstract

The bearing capacity of a foundation is one of the factors in calculating the design of a structure. The calculation for bearing capacity and settlement is controlled by the characteristics of the soil. Expansive soil is a type of soil where it has a drastic swelling and shrinking characteristics based water content contained inside. This journal will discuss one of the factory construction projects located in Karawang, West Java. The foundation is of spun concrete pile with a diameter of 35 cm. Soil data testing consisted of 12 borelog tests, 38 cpt tests, and 24 laboratory tests. Calculation of bearing capacity used are of six methods. Two methods are used for settlement calculation. Results of theoretical calculations will be compared with results from Pile Driving Analyzer (PDA). The difference in settlement calculation based on semi-empirical method is 0.02% for W-1288 pile, and 2.39% for W-1623 pile. As for the Davisson method, the difference in settlement calculations is 20.02% for W-1288 pile, and 13.82% for W-1623 pile. The comparison between the relationship of ultimate bearing capacity (RMX) and maximum settlement value (DMX) has no correlation because of the different factors that differ in soil characteristics on each tested pile. Abstrak Daya dukung sebuah fondasi adalah salah satu faktor dalam perhitungan desain pembangunan sebuah struktur. Faktor perhitungan daya dukung dan penurunan tanah dikendalikan oleh karakteristik tanah yang tersedia. Tanah ekspansif adalah salah satu macam tanah dimana tanah tersebut memiliki karakteristik kembang dan susut yang drastis berdasarkan kadar air yang terkandung didalamnya. Jurnal ini akan membahasa salah satu proyek pembangunan pabrik yang terletak di Karawang, Jawa Barat. Fondasi yang diperhitungkan dan dibangunan adalah fondasi tiang pancang beton spun dengan ukuran diameter 35cm. Pengujian data tanah berupa 12 uji borelog, 38 uji sondir, serta 24 uji sampel laboratorium. Perhitungan daya dukung fondasi akan menggunakan enam metode dalam perhitungan. Perhitungan penurunan akan menggunakan dua metode yakni metode semi-empiris dan metode Davisson. Hasil perhitungan teoritis akan dibandingkan dengan hasil pengujian fondasi dengan sistem Pile Driving Analyzer (PDA). Perbedaan perhitungan penurunan berdasarkan metode semi–empiris adalah 0,02% untuk tiang W-1288, dan 2,39% untuk tiang W-1623. Sedangkan untuk metode Davisson, perbedaan perhitungan penurunan adalah 20,02% untuk tiang W-1288, dan 13,82% untuk tiang W-1623. Selanjutnya, perbandingan antara hubungan nilai daya dukung ultimit (RMX) terhadap nilai penurunan maksimum (DMX) tidak memiliki korelasi dikarenakan terdapat faktor perbedaan parameter tanah pada setiap tiang yang diuji.
EVALUASI PENGGUNAAN RANGKA BAJA HOLLOW SEBAGAI SISTEM PENYANGGA BEKISTING PLAT LANTAI PADA PROYEK X Wijaya, Angga; Wijaya, Hendy
JMTS: Jurnal Mitra Teknik Sipil Volume 7, Nomor 1, Februari 2024
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v7i1.26666

Abstract

In the construction industry, the protection of formwork is a crucial aspect in designing and constructing sturdy and safe structures. Therefore, the success of an effective and efficient formwork support system plays a crucial role in ensuring the safety of the structure. One solution implemented in this industry is the use of hollow steel (square-shaped pipes) as a formwork support system for floor plates. This study presents the results of the analysis of hollow steel used in construction, particularly in buildings. The research aims to determine the ability of hollow steel in supporting the load of floor formwork. Data collection methods involve observation, interviews, and testing using a structural analysis program to determine the strength of hollow steel in supporting the load of floor formwork. The research results indicate that the hollow steel frame has a deflection of 0.0641 m, where the deflection is still below the maximum allowable limit. The hollow steel frame produces balanced lateral forces and moment forces, making it safe for use. However, the strength ratio of the steel frame does not meet the requirements due to a strength ratio greater than 1. Therefore, additional support is needed in the middle of the floor plate. Abstrak Dalam industri konstruksi, perlindungan terhadap bekisting merupakan aspek yang sangat krusial dalam merancang dan membangun struktur yang kokoh dan aman. Oleh karena itu, keberhasilan sistem penyangga bekisting yang efektif dan efisien memiliki peran yang sangat penting dalam memastikan keselamatan struktur. Salah satu solusi yang telah diimplementasikan di dalam industri ini adalah penerapan baja hollow (pipa berbentuk kotak) sebagai sistem penyangga bekisting plat lantai. Studi ini menyajikan hasil analisis baja hollow yang digunakan dalam konstruksi khususnya pada bangunan. Penelitian ini bertujuan untuk mengetahui kemampuan baja hollow dalam menahan beban bekisting plat lantai. Metode pengumpulan data dilakukan dengan melakukan pengamatan dan melakukan wawancara, serta untuk metode pengujian dilakukan dengan menggunakan salah satu program analisis struktur untuk menentukan kekuatan baja hollow dalam menahan beban bekisting plat lantai. Hasil penelitian menunjukkan bahwa rangka baja hollow memiliki lendutan sebesar 0,0641 m dimana besar lendutan yang terjadi masih di bawah batas maksimum lendutan yang diperbolehkan dan rangka baja hollow menghasilkan gaya dalam lintang dan gaya dalam momen yang seimbang, sehingga rangka hollow aman untuk digunakan. Namun rasio kekuatan dari rangka baja belum memenuhi persyaratan karena terdapat rasio kekuatan yang lebih besar dari pada 1, maka diperlukan penyangga tambahan pada bagian tengah plat lantai.
Co-Authors Andrawan, Andrawan Andy Prabowo Angelina, Sherlin Angga Wijaya, Angga Aniek Prihatiningsih Anita Maya Sutedja Arif Sandjaya Bhendy, Maria Theresia Primadewy Carolina, Erny Caroline Caroline Chrisantia, Oryza Christopher Esar, Senny Yesery Five, Johny Ghasani, Sabrina Maria Gotharia, Eduard Antero Gregorius Sandjaja Sentosa Gunawan, Mikael Dylan Handayani, Yuliastuti Ika Hendrata, Adi Pramono Herjunianto Herjunianto Irene Lingkan Parengkuan Iskandar, Ali Jafet, Nico Jaya, Ferdinand Wiliam Johan, Agus Johan, Albert Jonathan Jonathan Jong, FX Himawan Haryanto Kawanda, Aksan Kuncorojakti, Suryo Kusuma, I Made Andika Bara Lai, Jason Lai Wijaya Limantoro, Michael Christian Liucius, Yenny Untari Lo, Alvin Lucia Hendriati Malonda, Franklin Vincentius Martha Ervina Muhammad Raihan Suganda Novita, Bernadette Dian Palpialy, Sindi Siska Paul L Tahalele Prihatingingsih, Aniek Purnomo, Daniel Tri Putra, Brilliant Dwi Ricky Putra Sianty Dewi Silvester Boenyamin, Michael Siti Surdijati, Siti Soediono, Endang Isbandiati Soehadi, Shellin Sumi WIjaya, Sumi Susiyanti, Meli Tascia Adde Marcellia Teguh Widodo Theodora, Imelda Tjahjono, Yudi Tjahjono, Yudy Valentino, Ralf Josh Hilliard Wedharga, I Gede Putu Adhi Wilianto, Yufita Ratnasari Wuryanto Hadinugroho