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publikasi ilmiah dosen
jurnal internasional bereputasi 2022 - Dr. Any Nurhasanah, ST., MT.
STUDY OF POTENTIAL FLOOD RUNOFF USING HYDROLOGICAL ANALYSIS AND HYDRAULIC SIMULATION ON RIVERS IN URBAN AREAS, CASE STUDY ON WAY PISANG RIVERS, LAMPUNG PROVINCE
Every region in Indonesia, especially those around rivers that develop to urban areas is always faced with the problem of flooding in every rainy season. Flood disasters ranging from mild to large (flash floods) will have an impact on community activities and often result in property losses and even fatalities. To be able to anticipate the impact of flooding, a method is needed to estimate the amount of flood discharge and the potential for overflow that will occur in the area around the river. One method that can be used is hydrological analysis and hydraulics simulations, where hydrological analysis will obtain the amount of flood discharge at each repeat event, while hydraulics simulations can obtain data on potential flood discharges that will inundate the area around the river if no prevention and control measures are taken good and measurable countermeasures. In this study, to determine the return flood discharge, the Nakayasu method was used with river characteristics according to the data obtained, while the hydraulics simulation used HECRAS software. The results of hydrological analysis and hydraulics simulations show that for a 10-year return flood discharge of 323.01 m3/s, there is the potential for an overflow of 14.5 km with an inundation area of 15,314 m2 and a flood discharge for a 20-year return period of 376.43 m3/s. potential for overflow along 14.6 km with inundation area of 17,441 m2.
jurnal internasional bereputasi 2022 - Dr. Ir. Sugito, MT.
RSM-Based Optimized Compressive Strength of Mix Design Concrete Aggregates of Clamshell, Iron Sand, and Epoxy Resin
The need for environmentally friendly concrete that has above average compressive strength continues to be pursued to meet the infrastructure needs of humans. The availability of materials derived from organic waste such as clamshells is thought to be used as an aggregate from concrete which is more environmentally friendly when combined with previously known inorganic materials. The purpose of this study was to optimize the compressive strength of concrete-filled with clamshell powder (CSP), iron sand, and epoxy resin. An optimization approach based on response surface methodology (RSM) was used in this study. However, the addition of CSP as a filler in concrete has provided a compressive strength (31.18 MPa) above concrete by the Indonesian National Standard (SNI). The combination of CSP and epoxy resin under high-temperature curing conditions is possible to increase the compressive strength of concrete to 45.65 MPa.
jurnal internasional bereputasi 2022 - Dr. Ir. Sugito, MT.
Modeling of Mechanical Performance from Concrete Made by Combining Iron Sand and Glass Powder Filler under Hot Water Curing Condition
The proportions of the concrete are critical for obtaining a high-strength, high-quality product. Different concrete grades may support varying loads and have varying ratios. Therefore, the objectivity of this research is to study mechanical performance from concrete treated with iron sand, glass powder, and hot water curing. The level of iron sand and glass powder treatment added to the SNI concrete composition is 2% to 10%, 1% to 5%, (w/w), respectively. The curing time and temperature were applied between 1 hr to 4 hr and 301 K to 343 K. The compressive strength of the concrete was tested on 0, 1, 3, 7, and 28 days after molding using UTM with a combination of linear regression and response surface models for optimization.
jurnal internasional bereputasi 2022 - Dr. Ir. Sugito, MT.
Response surface methodology approach for optimized compressive strength of some mix design concrete aggregates from waste cockle shells and glass powder
Nowadays, with increased demand for aggregates for concrete and an awareness of the need of protecting natural resources, experts are becoming increasingly interested in waste material as a building material substitute. However, the compressive strength is influenced by the composition of concrete. In this study, the compressive strength of concrete under substitution using waste from cockle shells and glass was investigated using Response Surface Methodology (RSM). Central Composite Design (CCD) based on RSM was used to assess the influence of epoxy resin, cockle shells powder, and glass powder on compressive strength responses. RSM developed first-order and second-order mathematical models with findings from experimental design. Analysis of variance was used to determine the correctness of CCD’s mathematical models. Desirability analysis was then employed to optimize epoxy resin, cockle shells powder, and glass powder yielding maximum compressive strength. The RSM analysis revealed that the empirical results fit well into linear and quadratic models of concrete compressive strength.
jurnal internasional bereputasi 2022 - Dr. Ir. Sugito, MT.
Concrete compressive strength of mix proportioning cockle shell, glass powder and epoxy resin under hot water curing condition through response surface methodology
Nowadays, the significant demand for concrete has become a problem in concrete using aggregate from waste. Using standard concrete is recommended to reduce the breakdown of buildings. Unfortunately, standard materials used to produce previous concrete are not entirely environmentally friendly. As a result, many researchers have committed their awareness to identifying eco-friendlier substitutions in manufacturing concrete substitution aggregate from waste. In this respect, this paper discussed the proposed efficient procedure to indicate the compressive strength from mixed proportioning cockle shell, glass powder, and epoxy resin as concrete under hot water curing conditions (60 °C, 4 hr) using response surface methodology. The experimental design used in this research uses a response surface methodology.
jurnal internasional bereputasi 2021 - Dr. Aprizal, ST., MT.
The Development of the Flood Inundation Area Model in the Way Sekampung Sub- Watershed in Lampung
Flood disasters often occur in most areas in Indonesia. Floods are the most common disasters that cause losses and casualties. Flood disaster mitigation needs to be done to overcome and reduce the impact of losses. Mitigation of flood disasters will be helpful if you can predict in advance the potential for inundation caused by flooding, namely by modeling flood inundation. So far, research on modeling the area of flood inundation in Indonesia can be categorized as relatively rare. It is due to the many obstacles that surround it. The problem faced is the unavailability of complete data caused by limited funds and the complexity of most of the watersheds in Indonesia. The study aims to develop a flood inundation area model based on land use conditions and rain variables. It is done by maximizing minimal data and integrating empirical and 2D hydrodynamic modeling formulated with statistical models. The method used is to collect secondary data in the form of rain and land use data and primary data by conducting field surveys of flood inundations that have occurred.
jurnal internasional bereputasi 2021 - Dr. Ir. Rajiman, MM., MT.
Engineering of Novel Fe‐Based Bulk Metallic Glasses Using a Machine Learning‐Based Approach
A broad range of potential chemical compositions makes difcult design of novel bulk metallic glasses (BMGs) without performing expensive experimentations. To overcome this problem, it is very important to establish predictive models based on artifcial intelligence. In this work, a machine learning (ML) approach was proposed for predicting glass formation in numerous alloying compositions and designing novel glassy alloys. The results showed that our ML model accurately predicted the glass formation and critical thickness of MGs. As a case study, the ternary Fe–B–Co system was selected and efects of minor additions of Cr, Nb and Y with diferent atomic percentages were evaluated. It was found that the minor addition of Nb and Y leads to the signifcant improvement of glass-forming ability (GFA) in the Fe–B–Co system; however, a shift in the optimized alloying composition was occurred. The experimental results on selective alloying compositions also confrmed the capability of our ML model for designing novel Fe-based BMGs.
jurnal internasional bereputasi 2021 - Dr. Ir. Rajiman, MM., MT.
The Effect of Addition Basalt Stone and Coal as Substitution Material for Producing Cement Clinker
National infrastructure development in Indonesia requires supporting materials, one of which is cement. This increases cement clinker production. The composition of limestone as the main raw material required in the manufacture of clinker is 81%. Basalt is used as an alternative raw material because it contains SiO2, Al2O3, and Fe2O3 with a total of >70%. It meets the chemical requirements of ASTM C618 as a substitute material for cement making. This study aims to determine the effect of adding 10% basalt rock and coal variations as a limestone substitution in cement clinker manufacture. Coal is obtained from the Tanggamus district with the variations used, namely 5, 10, 15, and 20% outside the total mass. Raw materials such as limestone, silica stone, clay, basalt stone, coal, and iron sand are ground with a ball mill and formed into pellets followed by burning at sintering temperatures of 1100, 1200, and 1300 oC with a holding time of 2 h.
jurnal internasional bereputasi 2020 - Dr. Ir. Rajiman, MM., MT.
Comparison of Laterite Soil and Slaked Lime to the Strength of Mortar Geopolymer Press on Curing In Water
Most of the surface layer in the Papua and Kalimantan regions is laterite soil. When dry, the laterite soil will dry out, but the laterite soil becomes overworked when it contains large amounts of water. Cement production requires a large amount of energy, so concrete and mortar geopolymer is a material that has great potential as an alternative to reducing the use of PortSoil cement because it has mechanical properties that are almost similar to PortSoil cement-based concrete. This study discusses the use of fly ash and activator alkalis (NaOH and Na2SiO3) to bind laterite soil by adding Slaked lime to reduce the use of an oven to form a geopolymer mortar. The ratio of laterite soil and extinguished lime was 95%: 5% and 90%: 10%. Treatment is carried out after the specimen has hardened, curing in water for 3, 7, and 28 days. After treatment for 3, 7, and 28 days, it is decompressive strength testing and analyzed to determine the mortar geopolymer’s behavior.
jurnal internasional 2022 - Dr. Eng. Fritz Akhmad Nuzir, ST., MA.
Study on the Potential of Historical Mahogany Trees in Improving Urban Air Quality
Metro City is one of the cities in Lampung Province, Indonesia, which has experienced various infrastructure development which contributed to the decrease of the air quality. Urbanization also causes constant decrease in term of the number of green open spaces. Yet green open space plays an important role in maintaining urban air quality. Vegetation (i.e., tree) as the main component of green open space has the ability to absorb and store carbon emission. In Metro city, there is a major green open space that includes numerous large-sized Mahogany trees lining along A.H. Nasution Road. The purpose of this study was to estimate the level of air pollution from emissions of the passing-by motorized vehicles, calculate the capacity of carbon sequestration by the Mahogany trees, and determine the potential of the Mahogany trees in improving air quality. Authors collected primary data on the diameter of the tree trunks and the number of passing-by vehicles to estimate the carbon-storing capacity and carbon emission by utilizing allometric equation and emission load analysis. This study concluded that the Mahogany trees could play an important role on storing 74% of expected annual CO2 emission in Metro City. This could be linked to the achievement of the SDGs especially Target 11.6.
jurnal nasional terakreditasi 2022 - dr. eng. frtiz akhmad nuzir, st., ma.
Green Building Performance Assessment with EDGE Building App on Clinic Design Implementing Passive Design Strategy from Climate Consultant
The research methodology utilized a building performance simulation method using the Climate Consultant application in presenting a summary of climate data on the site and generating recommendations for passive design strategies. After the application of these recommendations to the design of the clinic, then an evaluation of the performance of the building was carried out using the EDGE Building App. From building performance simulations carried out in study case examples using the Climate Consultant application, recommendations were obtained in the form of 20 passive design strategies in which ten strategies could be applied. The design results obtained are proven to have an arguably good energy efficiency when evaluated with the EDGE Building App. This evaluation also provided recommendations for several reduction and saving steps from three aspects of building elements, namely:
jurnal nasional terakreditasi 2022 - dr. ir. rajiman, mm., mt.
Effect of Fly Ash Variation and Heating Temperature on Physical Properties, Chemical Composition, Phase Structure, and Morphology in Making Red Brick
Red brick is a building material that can be used as a construction material. Red bricks are made of pure clay or mixed materials. This study aimed to determine the effect of fly ash and heating temperature variations on physical properties (compressive strength, density, porosity, and absorption), chemical composition, phase structure, and morphology in brick making. Characterization shows that the phases formed in red brick are quartz (SiO2), hematite (Fe2O3), and anorthite (Al2O3).
jurnal nasional terakreditasi 2020 - dr. any nurhasanah, st., mt.
Analysis of the Tsunami Evacuation Route in Kunjir Village and Way Muli Village, South Lampung Regency
This research was conducted to analyze the effectiveness of existing evacuation routes in Kunjir Village and Way Muli Village by calculating the level of safety of the population when evacuating in the event of a tsunami disaster. The data used are direct field observations, topographic maps derived from aerial photo mapping results, existing conditions of evacuation routes, gathering conditions, evacuation direction signs, and data on tsunami wave heights that may occur in the study area. We analyze the tsunami disaster evacuation route using Network Analyst in ArcGIS. Furthermore, the evacuation route is determined which has a road width of more than 2 m so that not all roads in both villages are used as evacuation routes.
jurnal nasional terakreditasi 2020 - dr. ir. rajiman, mm., mt.
KETAHANAN SULFAT SEMEN OPC + FLY ASH DENGAN PORLAND COMPOSITE CEMENT (PCC) PADA MUTU BETON K-300
Industri konstruksi berkaitan erat dengan bangunan beton. Material penyusun beton yang paling utama adalah semen dan semen yang paling banyak digunakan adalah semen murni (klinker). Perkembangan diberbagai bidang industri selain memberi manfaat bagi masyarakat namun juga memberikan masalah yaitu limbah buangan dari industri tersebut. Tujuan Mengetahui pengaruh dari penambahan fly ash yang ditambahkan ke dalam semen murni (klinker) dengan Portland Composite Cement (PCC) terhadap kuat tekan beton yang dihasilkan. Mengetahui pengaruh kuat tekan beton yang mengalami perendaman dengan larutan sulfat.
jurnal nasional terakreditasi 2020 - dr. ir. rajiman, mm., mt.
USING IRON ORE WASTE AS AGGREGATE IN MAKING K. 300 QUALITY CONCRETE
The main component of concrete is cement, water, and aggregate (fine and rough aggregate), with aggregate constituting between 50% and 60% of total volume. Iron stone coming from nature is a material alternative that can be used as rough aggregate in making concrete. This research was conducted by sieving iron ores with sieving particle sizes of 2mm, 2-5 mm, 5-8 mm, and 10-12 mm. The compressive strength test was conducted at 7, 14, and 28 days.
jurnal nasional tidak terakreditasi 2022 - dr. any nurhasanah, st., mt.
Perancangan Sistem Jaringan Perpipaan Distribusi Air Bersih di Desa Sukaraja Kecamatan Semaka Kabupaten Tanggamus Provinsi Lampung Menggunakan Aplikasi EPANET 2.0
Penelitian ini bertujuan untuk menentukan sistem distribusi yang sesuai untuk Desa Sukaraja, menghitung jumlah debit air minum yang dibutuhkan di Desa Sukaraja dan menghitung diameter pipa yang diperlukan di lapangan dalam sistem jaringan perpipaan air minum. Metode yang dipakai dalam penelitian ini adalah melakukan perancangan sistem jaringan perpipaan dengan melalukan survei lokasi menggunakan aplikasi Google Earth dan dilanjutkan menggunakan beberapa aplikasi lain yaitu Microsoft Excel yang berfungsi sebagai alat bantu untuk menghitung koordinat, aplikasi Paint yang berfungsi mengganti format gambar ke BMP supaya bisa dibaca oleh aplikasi EPANET 2.0, dan yang paling utama adalah aplikasi EPANET 2.0 yang berfungsi untuk memproses data hingga mendapatkan hasil berupa pressure, velocity dan lain-lain.
jurnal nasional tidak terakreditasi 2022 - dr. ir. sugito, mt.
Pengaruh Filler Serbuk Kaca terhadap Karakteristik Beton Substitusi Pasir Besi dengan Curing Air Panas
Penelitian ini bertujuan untuk meningkatkan mutu beton dengan waktu produksi yang cepat. Bahan campuranberupa serbuk kaca digunakan sebagai filler (bahan pengisi) dengan variasi 1%, 2%, 3%, 4%, 5% dan 6% untuk menentukan kadar filler serbuk kaca optimum dan didapat kadar optimum sebesar 3%, kemudian proporsinya dibuat sebagai benda uji untuk pengujian lanjutan dengan curing air panas. Digunakan data sekunder berupa substitusi pasir besi optimum sebanyak 10% dan curing air panas optimum pada suhu 40o C selama 4 jam.
jurnal nasional tidak terakreditasi 2022 - dr. ir. sugito, mt.
KENYAMANAN TERMAL PADA BANGUNAN RUMAH TINGGAL (Studi Kasus: Jalan Imam Bonjol, Gg. Randu, Dermawan 1, Kemiling, Bandar Lampung)
Rumah tinggal yang terletak di Jalan Imam Bonjol, Gg. Randu, Dermawan 1, Kemiling, Bandar Lampung merupakan bangunan rumah tinggal di kawasan padat penduduk. Penelitian ini bertujuan untuk mengetahui tingkat kenyamanan termal pada bangunan rumah tersebut. Penelitian dilakukan pada ruang dalam (indoor) yang meliputi ruang tamu dan ruang luar (outdoor) yang meliputi teras dan halaman rumah. Penelitian ini menggunakan metode pengukuran secara langsung dan bertahap. Pengukuran ini menggunakan alat pengukursuhu dan kelembapan (termohygrometer digital) dan alat pengukur kecepatan angin (anemometer).
jurnal nasional tidak terakreditasi 2021 - dr. susilowati, st., mt.
ANALISA NILAI RISIKO K3 KONSTRUKSI STUKTUR BAWAH PADA PEMBANGUNAN THE BAY APARTEMENT BANDAR LAMPUNG
Konstruksi merupakan pekerjaan yang melibatkan bukan hanya manusia sebagai pekerja, melainkan juga unsur-unsur lain yang mendukung seperti penggunaan alat-alat berat hingga terlibatnya bahan material dalam jumlah besar. Hal ini menyebabkan dunia konstruksi memiliki risiko kecelakaan kerja lebih tinggi dibandingkan jenis pekerjaan lainnya. Penelitian ini menganalisa tingkat risiko keselamatan dan Kesehatan kerja (K3) konstruksi berdasarkan Peraturan Menteri Pekerjaan Umum No. 05/PRT/M/2014 tentang Pedoman Sistem Manajemen Keselamatan dan Kesahatan Kerja (SMK3) Konstruksi Bidang Pekerjaan Umum pada proyek pembangunan The Bay Apartement Kota Bandar Lampung.
seminar internasional 2021 - dr. eng. fritz akhmad nuzir, st., ma.
Promoting Mahogany Trees as the Landscape Heritage in Metro City onto Achieving SDG 11
Metro City in Lampung Province was started from an area established from the policy of colonization from Java Island carried out by the Dutch East Indies colonial government. This program in addition to relocating residents from the island of Java also “relocated” an element of the urban landscape with a distinctive physical character, which is a row of Mahogany Trees. In Metro City, Mahogany Trees have grown well along Jl. AH. Nasution which is the axis of Metro’s spatial structure. Through virtual observations and documentation using Google Maps data from 2015, 2018, and 2019 by utilizing the Streetview, it was known that there were 161 Mahogany trees along this road. By knowing the current condition of the row of Mahogany Trees, the importance of immediate conservation efforts can be identified. There are four conservation components that need to be implemented, namely community participation, knowledge, and skills, as well as good planning, regulations and institutions, and also financing. If conservation can be done well, landscape heritage will not only become a sustainable urban identity but will also act as a catalyst for socio-economic development through tourism and trade, and of course the health of residents and their natural environment in accordance with Goal 11 Sustainable Development Goals (SDGs).
seminar internasional 2020 - dr. eng. fritz akhmad nuzir, st., ma.
Student’s Perception of Sidewalk Condition in Kokurakita Ward, Kitakyushu City
Japan as country that has the biggest quantity of passerby, from students even kindergarten to the elderly, most of them chose walk as their daily transportation. Kokurakita is ward of Kitakyushu city, Japan. As an administrative service and the largest commercial and shopping areas of Kitakyushu, are clustered around Kokura Station. This research aims to obtain what factors makes Japanese people interested in walking on sidewalk, especially for young people. Data collection through questionnaire using quantitative method were conducted in Kitakyushu Science and Research Park for students only, aims to found out student’s perception of sidewalk in Kokurakita. This research focused on the experience of walking in Kokurakita, the center of Kitakyushu city.
seminar internasional 2020 - ronny h. purba, ph.d.
LARGE SCALE EXPERIMENTAL INVESTIGATION OF SPECIAL MOMENT RESISTING CONNECTIONS IN STEEL PLATE SHEAR WALLS
Past research in steel plate shear walls (SPSWs) reported that plastic hinge rotation demands at the ends of horizontal boundary elements (HBE) are expected to be large. This high rotation demand would be difficult to achieve using the ordinary-type connections specified in the AISC 2016 Seismic Specifications for HBE connection to vertical boundary elements (VBE). Moreover, fractures of HBE-to-VBE connections at lower drift would prevent SPSW specimen to perform as an effective seismic force resisting system of which normally is specified to achieve a higher target drift. This paper presents the results of a large-scale experimental investigation on the behavior of special moment resisting connections (SMRC) in SPSW.
seminar nasional 2022 - dr. aprizal, st., mt.
Pemanfaatan Teknologi Cerdas Dalam Rangka Pengurangan Risiko Bencana Terkait Air di Era Pasca Pandemi Covid-19
Prosiding Pertemuan Ilmiah Tahunan (PIT) HATHI ke-39 Mataram, 28 Oktober 2022 Jilid 3
seminar nasional 2022 - dr. aprizal, st., mt.
Tingkat Akurasi Curah Hujan Citra Satelit Terhadap Curah Hujan Terukur
seminar nasional 2022 - ronny h. purba, ph.d.
DINDING GESER PELAT BAJA SEBAGAI SISTEM PEMIKUL BEBAN GEMPA UNTUK MITIGASI KERUSAKAN STRUKTUR BANGUNAN BERTINGKAT RENDAH
Sebagian besar wilayah Indonesia berada diarea rawan gempa dan kegagalan struktur bangunan bertingkat rendah sering dijumpai pada kejadian gempa di Indonesia. Salah satu cara memitigasi bencana ini adalah menggunakan Dinding Geser Pelat Baja (Steel Plate Shear Walls, SPSW) sebagai Sistem Pemikul Beban Gempa. Namun selama ini, SPSW umumnya digunakan pada bangunan bertingkat tinggi, oleh karena itu dalam penelitian ini SPSW dikaji pada bangunan bertingkat rendah untuk mitigasi kerusakan strukturnya. Untuk tujuan ini, penelitian eksperimental dilakukan terhadap benda uji SPSW berukuran 1200 1200 mm dengan 9 pola perforasi dengan tujuan memodifikasi prilaku pelat baja setebal 2 mm agar mencapai sistem yang efektif dan ekonomis dalam penerapannya dibangunan bertingkat rendah.
seminar nasional 2022 - dr. susilowati, st., mt.
Pemanfaatan Teknologi Cerdas Dalam Rangka Pengurangan Risiko Bencana Terkait Air di Era Pasca Pandemi Covid-19
Prosiding Pertemuan Ilmiah Tahunan (PIT) HATHI ke-39 Mataram, 28 Oktober 2022 Jilid 4