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All Journal Civil Engineering Forum Teknik Sipil Inersia : Jurnal Teknik Sipil dan Arsitektur MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil Jurnal Teknik Sipil dan Perencanaan Jurnal Tata Kota dan Daerah Journal of Engineering and Technological Sciences Jurnal HPJI (Himpunan Pengembangan Jalan Indonesia) Semesta Teknika Teknisia Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Civil Engineering Journal Rang Teknik Journal Jurnal Pengembangan Rekayasa dan Teknologi Journal of the Civil Engineering Forum Jurnal Ilmiah Multidisiplin Indonesia ASEAN Natural Disaster Mitigation and Education Journal

Iman Satyarno

Universitas Gadjah Mada

Author-ID : 374648

Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Mechanical Engineering Physics Social Sciences Transportation Other

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STUDI NUMERIK RESPON STRUKTUR MODIFIKASI BANTALAN BETON UNTUK NON-BALLASTED TRACK Danang Purwanto; Iman Satyarno; Andreas Triwiyono
TEKNISIA Vol. XXIV, No. 1, Mei 2019
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol24.iss1.art2

According to Rencana Induk Perkeretaapian Nasional (RIPNas), making plans for the development of Indonesian railways until the next 2030. The targets for the development of railway networks and services to be achieved in 2030 include a national network of 12,100 km (spread on Java-Bali, Sumatra, Kalimantan, Sulawesi and Papua). Construction of railway track is generally divided into two main types, namely, ballasted tracks and non-ballast tracks. In this study the non-ballasted track or ballastless track is to modify the width of the sleeper that will be used without using ballasts on the railroad tracks. This is done to reduce the use of coarse aggregates in ballasts so that if used in areas that do not have natural resources in the form of coarse aggregates a railway track can be built. The research will be carried out according to the condition of the soil gravel, dense sand, medium dense sand, silty medium dense dan loose sand. Different types of soil cause different responses or behaviors from the modification of the sleeper that are located above the ground. This study will discuss the analysis of rail displacement and rail bending stress that occur in the modification of railroad concrete sleeper for non-ballast use in some soil conditions. The study was conducted with software SAP2000 version 2014 to analyze displacement and rail bending stress on concrete sleeper modification with dimensions 400 x 2440 mm2; 1200 x 2440 mm2; 2000 x 2440 mm2; 2800 x 2440 mm2 dan 3600 x 2440 mm2 for each different type of soil to determine the dimensions of modification of concrete sleeper that can be used. According AREMA(1999) Result of rail displacement rail may not exceed 6 mm and rail bending stress may not exceed 75 N/mm2.

KUAT LENTUR PANEL DINDING BETON BUSA DENGAN LAPIS GRC DAN WIREMESH Lilis Tiyani; Iman Satyarno; Ashar Saputra
TEKNISIA Vol. XXIV, No. 2, November 2019
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol24.iss2.art2

Lightweight concrete is high in demand as it offers lighter specific gravity which makes the load on the structure smaller. In this research, lightweight concrete was produced by mixing water, cement, sand and foam. Besides aiming to obtain lighter specific gravity, the target of this research was also to design lightweight foam concrete with compressive strength equal to the one of commonly used materials for walls of around 3-5 MPa. However, foam concrete has relatively weaker tensile strength, that it would be inadequate when it has to hold the vertical force of the wall when it is applied as wall panels. This research was conducted to examine the flexural strength of the use of GRC coating and wiremesh for wall panels. Cylinder test was performed using tools with a size of 150 mm in diameter x 300 mm in length to analyze the modulus of elasticity at 28 days old, and three cubical test tools for each variance with a size of 50 mm x 50 mm x 50 were employed to test the tensile strength at 28 days old. A number of wall panel specimens with a thickness of 50 mm, width of 400 mm and length of 800 mm were used to measure the flexural strength. The tests performed in this research resulted in modulus of elasticity of 6856,6 MPa, tensile strength of 0,7 MPa. The flexural strength of wall panels without GRC outer layer and without wiremesh reinforcement was found at 1,5 MPa. Meanwhile, the flexural strength of the wall panel with GRC outer layer without wiremesh reinforcement was found at 4,6 MPa. Finally, the wall panel applied with GRC outer layer and wiremesh reinforcement showed a flexural strength 5,3 MPa.

TINJAUAN GEOTEKNIK KEAMANAN REMBESAN DAN PEMBEBANAN GEMPA PADA STABILITAS LERENG (Studi: Bendungan Way Sekampung) R. Abadirulian Ervantara; Ahmad Rifa'i; Iman Satyarno
Rang Teknik Journal Vol 5, No 2 (2022): Vol. 5 No. 2 Juni 2022
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Abstract : Way Sekampung Dam is built to optimize the utilization of the Way Sekampung watershed. It is classified as an embankment dam with upright core which is following with a high risk of failure. The research of dam slope stability become an effort to fulfill dam safety. This study is based on the effects of seepage and seismicity. The seepage review is focused on what is the safety of the dam against potential piping, while for seismicity it is carried out under earthquake loading which using a modified earthquake coefficient approach. Based on the calculation of the seepage modeling using SEEP/W at the flood water level (FWL) and normal water level (NWL) obtained a value of the calculated safety factor (SFcal) of ≥ SFmin = 4 and, it can be said to be safe against piping. Slope stability modeling with SLOPE/W at post construction, flood water level (FWL),normal water level (NWL), and low water level (LWL), under earthquake loading conditions, it is found that the calculated safety factor (SFcal) varies in each loading condition. In the OBE loading conditions; the calculated safety factor value (SFcal) is greater than SFmin, indicating that the slope stability at the Way Sekampung Dam is safe. The simulation with MDE loading conditions, show results of the dam slope stability modeling in several variation resulted in SFcal < SFmin. This shows that the slope stability at the Way Sekampung Dam is not safe, have the potential to experience damage and collapse. Keywords: embankment dam, slope stability, seepage, earthquake, SEEP/W and SLOPE/W

EVALUASI SISTEM DRAINASE UNDERPASS YOGYAKARTA INTERNATIONAL AIRPORT (YIA) Yudhi Ardiansyah; Iman Satyarno; Radianta Triatmadja; Intan Supraba
Rang Teknik Journal Vol 5, No 2 (2022): Vol. 5 No. 2 Juni 2022
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Evaluasi terhadap sistem drainase underpass YIA perlu dilakukan untuk mengetahui kemampuan sistem drainase yang terdiri atas saluran samping, bak penampung dan pompa dalam mencegah terjadinya genangan. Evaluasi saluran samping dilakukan dengan membandingkan debit maksimum pada kala ulang 2, 5, 10, 25, 50 dan 100 tahun dengan kapasitas saluran terbangun. Adapun evaluasi bak penampung dan pompa dilakukan dengan melakukan simulasi routing volume akumulasi air yang masuk pada durasi hujan (td) sama dengan waktu konsentrasi (tc), 2tc, 3tc dan durasi hujan lebat dominan. Hasil evaluasi menunjukkan dimensi saluran samping yang terpasang mampu menanggulangi debit maksimum limpasan sampai dengan kala ulang 100 tahun. Evaluasi terhadap bak penampung menunjukkan untuk td=tc,td=2tc dan td=3tc kondisi sump pit akan aman apabila minimal 2 unit pompa dioperasikan secara bersamaan. Sedangkan untuk durasi lebih ekstrem (durasi hujan lebat dominan) 2 unit pompa hanya mampu mengatasi overcapacity akibat hujan dengan kala ulang 2 sampai dengan 10 tahun. Hasil evaluasi pada kinerja pompa menunjukkan faktor keamanan pompa menunjukkan nilai < 1 apabila yang beroperasi hanya 1 unit pompa sedangkan untuk kondisi 2 unit pompa beroperasi bersamaan nilai faktor keamaanan menunjukkan angka di atas 1 (aman) untuk durasi hujan singkat. Pada hujan dengan durasi ekstrem, faktor keamanan menunjukkan angka aman untuk hujan dengan kala ulang rendah

PERENCANAAN KAWASAN HUNIAN KOMUNAL SEMENTARA DENGAN KONSEP MULTI-FUNGSI DALAM PERSPEKTIF PENGEMBANGAN WILAYAH KOTA PALU Anisa; Ashar Saputra; Iman Satyarno
Jurnal Tata Kota dan Daerah Vol. 14 No. 2 (2022): Jurnal Tata Kota dan Daerah
Publisher : Department of Urban and Regional Planning, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.takoda.2022.014.02.4

Gempa bumi 2018 di Kota Palu menyebabkan kerusakan fasilitas umum dan aset masyarakat, hal ini mengharuskan para korban mengungsi ke hunian sementara hingga rumah mereka selesai direkonstruksi atau memperoleh hunian baru. Problematika masyarakat menolak relokasi, masyarakat tidak nyaman tinggal di hunian sementara, hingga pembangunan fasilitas hunian sementara yang meningkatkan biaya pembangunan. Hal ini memecah fokus rehabilitasi dan rekonstruksi. Berdasarkan fenomena tersebut dapat disimpulkan bahwa dalam situasi darurat regulasi tidak lagi diprioritaskan, sehingga fasilitas penting seperti hunian sementara perlu dipersiapkan secara matang. Penelitian ini bertujuan merencanakan sistem fasilitas hunian sementara dengan konsep multi-fungsi. Pengumpulan data dilakukan dengan survey instansional, pengisian kuesioner, dan mengkaji pustaka. Penelitian ini dilakukan secara kuantitatif dengan menggunakan metode Analisis Hirarki Proses (AHP), dimana peneliti menggunakan kriteria dari 4 Stakeholder untuk menentukan lokasi alternatif yang cocok dikembangkan menjadi kawasan hunian komunal sementara. Penelitian ini juga mengkolaborasikan analisis klasifikasi tingkat bahaya dan klasifikasi kepadatan penduduk. Hasil dari penelitian ini menunjukkan bahwa kawasan hunian komunal sementara terdiri atas tiga hirarki yaitu Kecamatan Mantikulore sebagai Pusat hunian komunal sementara. Kecamatan Palu selatan, Kecamatan Tatanga dan Kecamatan Ulujadi, Kecamatan Palu Utara, dan Kecamatan Tawaeli akan menjadi Sub-pusat pelayanan hunian komunal sementara. adapun Kecamatan Palu Barat dan Kecamatan Palu Timur menjadi kawasan terlayani. Kata Kunci : huntara, hirarki pelayanan, multifungsi, Kota Palu

Seismic Performance Evaluation of Wharf Based on ASCE 61-14 Kukuh Adhi Kafie; Andreas Triwiyono; Iman Satyarno; Hsuan-Teh Hu
Journal of the Civil Engineering Forum Vol. 9 No. 3 (September 2023)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.6749

The adequacy of the structural performance of a wharf in withstanding seismic loads is of paramount importance. Therefore, this research aims to conduct an accurate pushover analysis on the adequacy of a wharf located in North Sulawesi, Indonesia. The study provides a comprehensive overview of the seismic performance of the wharf by examining displacement and strain parameters of its plastic hinge components under various loading conditions. To simulate accidental torsion, the wharf structure was analyzed by introducing variations in the eccentricity offset of the lateral pushover load of -5%, 0%, and 5% from the center of mass. The analysis of the torsion behavior involved a comprehensive examination of four control points located at each corner of the wharf plan. Additionally, the investigation took into account, the crucial aspect of soil-structure interaction by considering the equivalent fixity depth of the pile, which was used to evaluate the fixity length of the structure. In order to determine the target displacement of the wharf, analysis was performed in accordance with the established methodologies outlined in FEMA 356. It is also important to note that the seismic performance of the wharf was evaluated based on acceptance criteria in the form of strain limits imposed on various components, including concrete elements, reinforcing steel, and steel pipes, as prescribed by ASCE 61-14. In this study, a total of 30 models were examined, and the obtained results showed that the structure exhibited controlled and repairable damage even when subjected to a 475-year earthquake return period (CLE: Contingency Level Earthquake). Following this, the analysis of variations in displacement control point served to determine the inherent torsion exhibited by the structure, and the introduction of different lateral load eccentricity offsets and variations in pushover loading direction were found to contribute to the increased displacement and strain in the plastic hinge components.

The Effect of Polypropylene Fiber and Steel Fiber on Geopolymer Concrete Widiana, Niza; Satyarno, Iman; Siswosukarto, Suprapto
Jurnal Teknik Sipil dan Perencanaan Vol 25, No 1 (2023)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v25i1.40999

One of the environmentally friendly concrete as an alternative to cement concrete in the future is geopolymer concrete which used a cement substitute in the form of fly ash. To prevent premature cracking of the concrete, this study added fiber types such as polypropylene fiber, and steel fiber (dramix), this experiment with 3 variables namely the addition of polypropylene fiber by 0%, 0.40%, 0.80%, 1.2%, steel fiber of 0.25%, 0.50%, 0.75%, 1.00%, as well as a combination of polypropylene fiber and steel fiber (0.4%P;0.50%D), (0.8%P;0.75%D), (1.2%P;1.00%D) of the weight of the concrete. In this study, using a beam specimen measuring 10x10x50 cm, for each percentage of fiber usage there are 2 beam trials. Geopolymer concrete in this study uses a ratio of NaOH and Na2SiO3 is 2:1 and a constant concentration of 10 Molar, to test the Flexural Strength Test of Concrete at the age of 28 days of concrete. The results of the highest average flexural strength of geopolymer concrete without fiber σl = 78.77 kg/cm2, using polypropylene 0.80% σl =50.50 kg/cm2, and 0.25% steel fiber σl =68.87 kg/cm2, the combination of both fibers (P0.4%; D0.25%) σl =65.34 kg/cm2. These results do not produce good workability, thus affecting the decrease in flexural strength. By increasing the ratio A = 0.35 to 0.45, the geopolymer concrete mix produces better workability with the highest average flexural strength of geopolymer concrete with polypropylene fiber 0.8% σl = 80.107 kg/cm2.

Preparedness of special needs school communities for earthquakes: A case study in an area with a very high seismicity in Daerah Istimewa Yogyakarta Satmoko, Tranggono Aji; Satyarno, Iman; Saputra, Ashar
ASEAN Natural Disaster Mitigation and Education Journal Vol. 2 No. 1: (July) 2024
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/andmej.v2i1.2024.1016

Background: DIY is a province in Indonesia that is very susceptible to earthquakes. In 2006, a seismic event measuring 6.2 on the moment magnitude scale struck DIY, causing injuries and extensive damage to both the structural and non-structural elements of several buildings, including one in the education sector. The problem of structural damage to educational facilities is a significant worry, especially in school communities that cater to vulnerable children, such as those in special needs schools/Sekolah Luar Biasa (SLB), who are more susceptible to harm during disasters. This study aims to assess the level of preparedness and accessibility of the special needs school community located in a very high seismic region of earthquakes in the DIY, in the event of an earthquake. Methods: The structural assessment took the form of a binary question, requiring a simple yes or no response. Findings: To reduce the risk of earthquakes in the special needs education sector, a review of the preparedness of the special needs school building and community was carried out by implementing “Satuan Pendidikan Aman Bencana (SPAB)” or Disaster Safe Education Unit guidelines. The findings suggest that SLB Sekar Melati Muh. Imogiri (78.26) was classed as having moderate earthquake risk, whereas SLB Dharma Bhakti Piyungan (88.55), SLB Insan Mandiri Dlingo (90.29), and SLB Purworaharjo (88.41) featured infrastructure that was rated as very vulnerable. With respect to SLB Dharma Bhakti Piyungan (64.52), SLB Insan Mandiri Dlingo (60.11), and SLB Purworaharjo (76.94), their average community readiness index scores put them in the intermediate capability category for earthquake preparedness. SLB Sekar Melati Muhmmadiyah Imogiri, however, was categorized as having a low capacity for earthquake readiness with an average index score of 56.92 for community preparedness. Conclusion: special needs school communities should raise their level of preparedness by undertaking seismic socialization and regular simulations to boost the community's understanding of earthquakes and reduce the likelihood of harm following an earthquake. Novelty/Originality of this Study: The study breaks new ground by assessing earthquake preparedness and accessibility in special needs schools within a high-seismicity region, addressing a critical gap in disaster risk reduction for vulnerable populations.

Frictional Axial Resistance of Clamped Split Pocket Mechanism Steel Structural Joint: An Experimental Study Putra, Whelly T.; Setiawan, Angga F.; Saputra, Ashar; Satyarno, Iman; Pratama, Hamdi Y.
Civil Engineering Journal Vol 10, No 9 (2024): September
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2024-010-09-07

The Clamped Split Pocket Mechanism (CSPM) prefabricated joint system was developed for a single-story steel instant house, designed to be compact and rapidly constructed without modifying the end of the beam and column element member. The CSPM bolted joint system was proposed as an optimal solution for post-disaster housing, especially after earthquakes. Despite its potential, the frictional tensile resistance behavior of the CSPM bolted joint system has not been previously studied, necessitating experimental investigation. This study examined the frictional tensile resistance behavior of the CSPM joint system by monitoring the effective friction coefficient under axial tension force. The experiments considered both the strong and weak axes of the joint and utilized two configuration types of specimens (L and T) with varying bolt pretensions of 2.5, 5, 7.5, and 10 kN. Results indicated that the effective friction coefficient of the CSPM bolted joint system ranged from 0.19 to 0.26, correlated to bolt pretension. Increased bolt pretension resulted in larger surface deformation of the split pocket, triggering a not uniform frictional tensile resistance across the steel surfaces of the split pocket joint. From this study, the achieved effective friction coefficients could guide the design of minimum pretension forces for clamps in prefabricated steel instant houses. Doi: 10.28991/CEJ-2024-010-09-07 Full Text: PDF

Modeling’s Effect of Irregular Building Structure with Vegetated Roof on Seismic Evaluation per ASCE 41-17 Fathurrachman, Muhammad Puja; Satyarno, Iman; Sulistyo, Djoko
Semesta Teknika Vol. 27 No. 2 (2024): NOVEMBER
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v27i2.22775

This study examines the seismic vulnerability of an irregular educational building with a vegetated roof in Yogyakarta using linear procedures based on ASCE 41-17. Modelling approaches differ Model 1 treats skylights and planter boxes as loads with straight roof slabs, while Models 2 and 3 use shells with sloping roof slabs. Vegetated roofs are featured in Models 1 and 2. The analysis, conducted at seismic hazard levels BSE-1N and BSE-2N using the ETABS program, evaluates structural components and compares Response Spectrum (RS) and Linear Time History (LTH) methods. Results show seismic weight variations of 1.20% to 15.04% between models. Model 1 fails to meet the criteria for modal analysis, while Models 2 and 3 do. The structural performance evaluation based on average demands at BSE-1N and BSE-2N levels varied from Immediate Occupancy to Life Safety performance. The LTH method in all models had higher acceptance ratios than the RS method.

Co-Authors Adita Dwi Sampurno Agus Budhie Wijatna Agus Taufik Mulyono Ahmad Rifa'i Ahmad Wancik Ali Awaludin Aminullah, Akhmad Ananto Nugroho, Ananto Andreas Triwiyono Anisa Ardha, Yusufa Kholifa Arfiati FArdhani, Arfiati Ari Dwi Hariyanto Arief Gunarto Ashar Saputra Ashar Saputra Danang Purwanto Darmawan, M. Fauzi Dedy Sumaryanto Dian Rifany K. Diarto Trisnoyuwono Djoko Sulistyo Fathurrachman, Muhammad Puja Gatot Subagio Gayatri Indah Marliyani Gerson Pongajow Hanani, Eklisia Haroki, Yusuf Haryadi Widodo Hendra Putra Howardy Howardy Hsuan-Teh Hu INTAN SUPRABA Juandra Hartono Juandra Hartono, Juandra Kardiyono T. Kardiyono T. Kardiyono Tjokrodimuljo Kardiyono Tjokrodimulyo Kukuh Adhi Kafie Latif Budi Suparma Lilis Tiyani Md Nor, Noorsuhada Muslikh Muslikh Ningtyas, Nadya Nur Pratama, Hamdi Y. Priyosulistyo Priyosulistyo Purnomo, Sidiq Putra, Whelly T. Putri, Andini Pratiwi R. Abadirulian Ervantara Radianta Triadmadja Rimindubby, Vriska D.S Satmoko, Tranggono Aji Setiawan, Angga F. Setiawan, Angga Fajar Subyakto Subyakto Sumartono, Ignatius Harry Suprapto Siswosukarto Suratmin Talitha Zhafira Utomo, Adityo Budi Vernandest, Effri Widiana, Niza Widiasmoro Widiasmoro Yanuar Haryanto Yudhi Ardiansyah Yudhi Arnandha Yuhasnita, Angeline Zulkifli, Rifdah Rofifah

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