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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL IPTEK Journal of Proceedings Series Journal of Engineering and Technological Sciences Mekanika Jurnal Teknik Sipil Journal of Advanced Civil and Environmental Engineering Civil Engineering Dimension Portal: Jurnal Teknik Sipil JIIP (Jurnal Ilmiah Ilmu Pendidikan) Edu Sociata : Jurnal Pendidikan Sosiologi Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Jurnal Jalan Jembatan Journal of Engineering and Technological Sciences Jurnal Teknik Sipil
Iswandi Imran
Institut Teknologi Bandung
Religion Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences Transportation Other

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Force Transfer Mechanism of Headed Anchorage Bar in Exterior Beam Column Joint with Finite Element Method and Strut and Tie Model Ria Ananda; Iswandi Imran
IPTEK Journal of Proceedings Series No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (873.671 KB) | DOI: 10.12962/j23546026.y2017i6.3266

Abstract

In structural concrete, the provisions for anchorage of straight bars and hooks sometimes present detailing problems due to the long development lengths and large bend diameters that are required. Occasionally, the requirements for straight bar anchorage and lap splices cannot be provided within the available dimensions of elements. Hooked bars can be used to shorten anchorage length, but in many cases, the bend of the hook will not fit within the dimensions of a member or the hooks create congestion and make an element difficult to construct. This congestion may lead to high fabrication effort needed and poor concrete placement, resulting in decrease of concrete quality at the joints. An alternative is the use of headed anchorage bar, which allows for extremely small development lengths, that can reduce congestion without compromising the integrity of the structure. As a result, designing and detailing the structure are made easier and more efficient. Headed bars are formed by the attachment of a plate or the forging of an upset bearing surface at the end of a straight reinforcing bar. Such bars are anchored by a combination of bond along the straight bar length and direct bearing at the head. This papers presents strut and tie models explaining force transfer mechanism of headed anchorage bar in exterior beam-column joint under monotonic loads. The proposed model is derived from beam-column joint specimen which have been tested experimentally. Stress and strain generated by modeling the beam column joint with finite element-based program, ATENA 3D. The result of the analysis explaining the behavior of headed anchorage bar is CCT nodes (compression-compression-tension). The model is consists of a strut with the nodal zone at the head for head bearing and a fan-shaped stress field for bond stresses along the development length.
Behavior of Reinforced Concrete Frames In-Filled with Lightweight Materials Under Seismic Loads Iswandi Imran; Aris Aryanto
Civil Engineering Dimension Vol. 11 No. 2 (2009): SEPTEMBER 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1894.669 KB) | DOI: 10.9744/ced.11.2.pp. 69-77

Abstract

This paper presents an experimental and analytical research conducted to study the in-plane behavior of reinforced concrete (R/C) frames in-filled with lightweight materials. The tests were performed on two single bay, single story in-filled frame specimens with ½ scale models. One of the test specimens was in-filled with lightweight materials, i.e. autoclaved aerated concrete (AAC) blocks, and the other, used as the comparison, was in-filled with clay brick materials. The loading used in the tests was in the form of cyclic in-plane lateral loads, simulating earthquake forces. Behavior of the frame structures was evaluated through the observed strength and deformation characteristics, the measured hysteretic energy dissipation capacity and the measured ductility. The experimental results show that the R/C frame in-filled with AAC blocks exhibited better performance under in-plane lateral loads than that in-filled with conventional clay bricks. In the analytical work, the performance of some analytical models available in the literature was evaluated in simulating the experimental results
Strength Enhancement, Ductility, and Confinement Effectiveness Index of Fly Ash-based Geopolymer Concrete Square Columns Herwani Herwani; Iswandi Imran; Bambang Budiono; Ediansjah Zulkifli
Journal of Engineering and Technological Sciences Vol. 54 No. 4 (2022)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2022.54.4.11

Abstract

Geopolymer concrete is an environmentally friendly construction material that has the potential to be applied in building structures. It is important to understand the structural behavior of geopolymer concrete. This paper presents an experimental investigation into the performance of structural elements of geopolymer concrete under concentric axial loads. The specimens were twelve square columns with a size of 170 x 170 mm and a height of 480 mm. The study variables were the tie spacing and the compressive strength of unconfined geopolymer concrete (f’c). The test results showed that the increase in f'cc was not as significant as the increase in unconfined concrete compressive strength (f'c). The value of strength enhancement (K) tended to decrease. The column ductility (m) and confinement effectiveness index (Ic) had optimum values. The effect of increasing the tie spacing (s) decreased the K, Ic, and m values of the column. The proposed f’cc formulation for geopolymer concrete is compatible.
Seismic performance of reinforced concrete bridge using friction pendulum bearing under different friction coefficients James Michael; Muslinang Moestopo; Iswandi Imran; Dionysius M. Siringoringo; Erwin Lim; Shinsuke Yamazaki
JACEE (Journal of Advanced Civil and Environmental Engineering) Vol 5, No 2 (2022): October
Publisher : Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/jacee.5.2.61-73

Abstract

Application of seismic isolation system is important in bridges design, primarily in seismically active countries. Bridges are prone to damage from seismic forces. Elastomeric isolation bearings have been applied in short-span bridges for some time in most countries. These bearings are preferred because of the low maintenance cost. However, these bearings are not reliable when subjected to large displacement and low temperatures. In the other hand, friction sliding bearings shows better performance under the former circumstances despite its use is still limited to long-span bridges and has not been explored further. This paper describes a performance evaluation of seismically-isolated short-span reinforced concrete bridge using friction pendulum system (FPS). Seismic performances of non-isolated and isolated models from the reference bridge functioning as light rapid transit (LRT) bridge in Jakarta are investigated using nonlinear time history analysis. The results demonstrate that isolated bridges with FPS performed better than non-isolated bridges under 1000-year earthquake as shown by reductions of base shear force, absolute deck acceleration, and acceleration amplification ratio. Comparisons of isolated bridges with different FPS friction types and arrangement have demonstrated that the reference bridge with all Type A friction (µ0 = 0.050) applied, performed the best among all other configurations.
The Evolution of Seismic Design Provisions in Indonesia's National Bridge Code Veby Citra Simanjuntak; Iswandi Imran; Muslinang Moestopo; Herlien D Setio
Journal of Engineering and Technological Sciences Vol. 54 No. 6 (2022)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2022.54.6.14

Abstract

To accommodate increased seismic hazards in Indonesia, provisions regarding structural details on seismic regulations have been tightened. In this paper, the variations in seismic hazard and detailing requirements from bridge code era before 1990 to the present was provided. To examine the bridge performance, pushover analysis was carried out based on the latest bridge code SNI 2833:2016/Seismic Map 2017. From the analysis results, the performance of older bridges would typically be less than more recently designed structures.  The performance level of the bridge in the era before SNI 2833:2016/Seismic Map 2017 will be Operational-Life Safety (LS) whereas the performance level of the bridge designed with SNI 2833:2016 will be Elastic – Operational. Referring to NCHRP 949 for bridge performance level evaluation, results show that the performance level of the bridge still satisfies the requirement, which is Life Safety under upper-level earthquake. Therefore, the existing bridge shows adequate capacity under the current seismic load Seismic Map 2017 (7% probability of exceedance in 75 years (RP= 1000 years)). Evaluation of seismic vulnerability needs to be done to ensure the safety of the existing bridges in Indonesia, most of which are located in earthquake-prone areas, especially those that were designed with older version regulations.
Analisis Pengaruh Kompetensi Guru, Pengorganisasian Sekolah dan Sarana Prasarana terhadap Kualitas Pembelajaran di SLB Kabupaten Sumbawa Burhanuddin, Burhanuddin; Hudaya, Chairul; Siswandi, Imran
JIIP - Jurnal Ilmiah Ilmu Pendidikan Vol. 6 No. 3 (2023): JIIP (Jurnal Ilmiah Ilmu Pendidikan)
Publisher : STKIP Yapis Dompu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (246.599 KB) | DOI: 10.54371/jiip.v6i3.1563

Abstract

Penelitian ini bertujuan mengetahui pengaruh kompetensi guru, pengorganisasian sekolah dan sarana prasarana terhadap kualitas pembelajaran di SLB Kabupaten Sumbawa. Subyek penelitian adalah guru pengajar di SLB Kabupaten Sumbawa. Sampel yang diambil sebanyak 30 orang dengan teknik sampel acak. Metode analisis yang digunakan kuantitatif dengan tehnik analisis korelasi. Instrumen disusun dalam bentuk angket dengan menggunakan skala Likers. Penelitian ini membuktikan bahwa: Pertama, terdapat hubungan yang positif dan signifikan kompetensi guru terhadap kualitas pembelajaran di SLB Kabupaten Sumbawa dengan nilai t Stat sebesar -14.05. Kedua, terdapat hubungan yang positif dan signifikan pengorganisasian sekolah dengan kualitas pembelajaran dengan nilai t Stat sebesar -31.06 dengan nilai t tabel 2.042. Hasil penelitian kecukupan sarana dan prasarana di SLB Kabupaten Sumbawa memiliki persentase kecukupan sarana yaitu ruang kelas Jurusan Tunanetra sebesar 54%, ruang kelas Jurusan Tunarungu sebesar 72%. Sehingga dapat disimpulkan bahwa terdapat pengaruh positif dan kuat antara kompetensi guru terhadap kualitas pembelajaran, antara pengorganisasian sekolah dengan kualitas pembelajaran, serta kecukupan sarana prasana masih terdapat kekurangan.
PERNIKAHAN DI BAWAH UMUR PRESPEKTIF HAM Imran Siswandi; Supriadi Supriadi
Edu Sociata : Jurnal Pendidikan Sosiologi Vol 6 No 1 (2023): Edu Sociata : Jurnal Pendidikan Sosiologi
Publisher : Edu Sociata : Jurnal Pendidikan Sosiologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33627/es.v6i1.1171

Abstract

Penelitian ini bertujuan untuk menjawab beberapa persoalan tentang apa penyebab pernikahan dini dan bagaimana pernikahan dini mempengaruhi kehidupan keluarga dalam konsep HAM. Metode yang digunakan dalam penelitian ini adalah penelitian kepustakaan, yaitu pencarian khusus untuk tujuan pengumpulan informasi dan kerja logika yang fokus pada objek penelitian dan informasi perpustakaan, atau fokus pada pemecahan masalah mendasar. Deklarasi Hak Asasi Manusia tidak hanya mengatur tentang keamanan keluarga, tetapi juga menyatakan bahwa laki-laki dan perempuan dewasa berhak menikah dan membentuk keluarga tanpa batasan kewarganegaraan atau agama. Menikah muda atau menikah pada usia muda dapat mengakibatkan berakhirnya pendidikan anak dan mengurangi kesempatan anak untuk perkembangan fisik, oleh karena itu dianggap sebagai pelanggaran hak asasi manusia. Perkawinan Anak, baik laki-laki maupun perempuan cenderung menyerang hak asasi perempuan. Hak anak yang terlantar juga hak atas pendidikan, hak pertumbuhan, perkembangan dan kesehatan. Manipulasi usia perkawinan sebenarnya tidak menyelesaikan masalah, tetapi menimbulkan masalah baru yaitu anak tidak siap secara psikologis untuk menikah muda atau di bawah umur di area domestik dan interna
Perkuatan struktur kolom beton bertulang dengan menggunakan lapisan fiber N. Retno Setiati , Iswandi Imran
Jurnal Jalan-Jembatan Vol 21 No 1 (2004)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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

Abstract

Beton komposit dengan menggunakan fiber atau dikenal dengan istilah Fiber Reinforced Polymer Composite (FRPC) telah ditemukan sebagai suatu metode efektif untuk memperbaiki kolom beton dibawak kekuatan struktur. Penelitian ini membahas masalah studi eksperimental dan teori analitis kolom beton rerkekang secara eksternal dengan lapisan serat Aramid atau dilkenal dengan istilah Aramid Fiber Sheet (Al ·S). Benda uji beton terkekang dan tidak terkekang diberi gaya tekan uniaksial. Berdasarkan hasil pengujian yang telah dilakukan diperoleh suatu kesimpulan bahwa untuk beton normal terkekang yang dibebani tekan uniaksial secara signifikan dapat meningkatkan kekuatan. daktilitas. dan kapasitas energi ahsopsi (energi yang diserap)
Advanced Geotechnical Solutions for Soft Soils: FEM Analysis and Hybrid Reinforcement in the Semarang-Demak Toll Road Project Kartawiria, Andi Kurnia Setiadi; Kamaruddin, Samira Albati Binti; Nazir, Ramli Bin; Alatas, Idrus Muhamad; Himawan, Agus; Hartasurya, Pasca; Imran, Iswandi; Mikhail, Reguel; Kurniawan, Yusrizal; Wibowo, Prasetyo Arief; Manurung, Ardita Elias; Maharani, Yusuf; Anggadinata, Yusmar; Setiawan, Muhammad Hariyadi; Siswantono, Siswantono; Wibawa, Sholeh Hendra; Editia, Rakhma Nur
Journal of Engineering and Technological Sciences Vol. 57 No. 5 (2025): Vol. 57 No. 5 (2025): October
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2025.57.5.7

Abstract

This paper presents an analysis of the data collected from the full-scale trial embankment implemented in the Semarang-Demak Toll Road project, part of a national strategic project in Central Java, Indonesia. The project integrates a sea dike with a road embankment. The main challenge of the project lies in constructing the embankment on soft soil layers up to 40 meters thick. The road embankment is designed to reach a height of 6 meters above Mean Sea Level (MSL) or 8 meters above the average seabed level. In the absence of ground improvement techniques—such as bamboo mattress, prefabricated vertical drains (PVD), or high-strength geotextiles—very soft soil with an undrained shear strength of approximately 6.5 kPa can support only a critical embankment height of about 3 meters. A hybrid reinforcement that combines bamboo mattresses, high-strength woven geotextile, PVD and staged embankment construction is selected to solve the shear strength and settlement problem. Mattress acts as platform and designed to deform as much as the soft-soil to spread initial embankment load uniformly and increase bearing capacity, PVD accelerates consolidation, and high-strength woven geotextile provides tension capacity. To achieve a load ratio of 1.3 in accordance with SNI 8460-2017, a 13.5-meter soil preloading needs to be constructed. Several monitoring systems were installed to monitor the behavior of the entire embankment system. Complementary investigations, including CPT, CPTu, and Deep Boring, were conducted. Finite element analysis (FEA) was then performed, revealing improved performance, achieving safety factors of 1.25 during construction and 1.55 long-term.
Efek Arus Berlebih Proteksi Katodik Terhadap Penurunan Kekuatan Lekatan Antara Baja Tulangan dan Beton Kristianto, Anang; Imran, Iswandi; Purwadaria, Sunara
Jurnal Teknik Sipil Vol 1 No 1 (2003): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v1i1.10326

Abstract

The results of a study on the effect of overcurrent on the bond strength between reinforcing steel and concrete are presented in this paper. Cathodic protection with a constant current density, based on the surface area of reinforcing steel, was applied to the test specimens for 5 months. A chloride mixture of 1.5% and 3.0% by weight of cement was added to the concrete mix in the form of CaCl2, to analyze the effect of CaCl2, and chloride concentration on the bond strength of reinforcing steel and concrete when cathodic protection current was applied. In this study, it was found that excessive current flowing into reinforcing steel resulted in a decrease in the bond strength between reinforcing steel and concrete. The decrease in bond strength in normal concrete (without CaCl2 admixture) was 4.33%, 9.63%, 13.29%, and 25.93% for current densities of 40, 200, 500, and 1000 mA/m2, respectively. In specimens with a mixture of CaCl2, 1.5%, there was an increase in adhesion strength of up to 108% for the protective current density, but at excess current density there was a decrease of up to 45.2%. SEM-EDS test results also showed a significant accumulation of Na and K and a reduction of chloride around the reinforcing steel. The formation of Na and K at the interface of reinforcing steel and concrete causes softening of the concrete which results in a decrease in the bond strength between reinforcing steel and concrete.
Co-Authors -, Asrurifak Adhijoso Tjondro Adhijoso Tjondro Agus Himawan Alatas, Idrus Muhamad Amrinsyah Nasution Amrinsyah Nasution Amrinsyah Nasution Amrinsyah Nasution Anang Kristianto Ananta Sofwan Ananta Sofwan Ananta Sofwan Anggadinata, Yusmar Antonius Antonius Antonius Antonius Arif Hidayat Aris Aryanto Asrurifak - Asrurifak, Muhammad Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Sunendar P Bambang Suryoatmono Bigman M Hutapea Bigman M. Hutapea Budiono, Bambang Budiono, Bambang Burhanuddin Burhanuddin Daony Roha Silitonga Delfebriyadi Delfebriyadi, Delfebriyadi Dionysius M. Siringoringo Ediansjah Zulkifli Editia, Rakhma Nur Elvira Elvira Erwin Lim Hanafi Ashad Hanafiah, Hanafiah Hartasurya, Pasca Herlien D Setio Herwani . Hudaya, Chairul Hutapea, Bigman M Hutapea, Bigman M. Ivindra Pane James Michael Johnny Setiawan Kamaruddin, Samira Albati Binti Kartawiria, Andi Kurnia Setiadi Kurniawan, Yusrizal Lim, Erwin Made Suarjana Maharani, Yusuf Manurung, Ardita Elias Masyhur Irsyam Mikhail, Reguel Mohamad Sahari Besari Mohamad Sahari Besari, Mohamad Sahari Muhammad Asrurifak Muslinang Moestopo Nazir, Ramli Bin Nuroji Nuroji Partogi H. Simatupang, Partogi H. Purwoko, Agus Raden Mariana Sari Badriah Remigildus Cornelis Ria Ananda Riawan Gunadi Ronald Simatupang Sabara, Akhmad Ilham Ramadhan Saptahari Soegiri Saptahari Soegiri Saptahari Soegiri Saptahari Soegiri, Saptahari Saptahari Sugiri Saptahari Sugiri Setiawan, Muhammad Hariyadi Shinsuke Yamazaki Siswantono, Siswantono Siti Aisyah Nurjannah, Siti Aisyah Sugiri, Saptahari Sugiri, Saptahari Sunara Purwadaria Supriadi Supriadi Veby Citra Simanjuntak Wanda Lestari Wibawa, Sholeh Hendra Wibowo, Prasetyo Arief Wihardja, Thavera Yosafat Aji Pranata Yulita Arni Priastiwi