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Review Design dalam Rangka Penanggulangan Banjir di Kali Jeroan Kabupaten Madiun Andri Kurniawan; Nursiah Chairunnisa
Jurnal Teknologi Berkelanjutan Vol 13 No 01 (2024): Vol 13 No. 01
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtb.v13i01.272

Abstract

Floods occur when the overflowing water cannot be accommodated by the river and inundates the flat area around the river. Flood protection parapets are one method for dealing with flooding on the Jeroan River in Madiun Regency. The 300-meter-long parapet was built in 2019. However, water seepage outside the embankment caused landslides, which was a problem during maintenance. So, from 2020 to 2021, the handling of the Jeroan River is evaluated based on financial conditions and input from the work directors. The stability analysis method was carried out using Geoslope software under normal, earthquake and rapid drawdown conditions. The results of the research were carried out at a location in Gelonggong Village, which was evaluated with three conditions and the addition of simple concrete blocks. The results show the safety factor value for normal conditions is 1.80, earthquake conditions 1.32, and rapid drawdown 1.6. At this location, slope strength is not added because the location is far from residential areas, so it does not endanger residents. The results of the analysis carried out in Kedung Jati Village, where there were three conditions, strengthening gabions and adding flat plate concrete blocks, showed a normal safety factor value of 3.19, earthquake conditions 2.18, and rapid drawdown 3.07. In Warurejo Village, the normal safety factor value was 3.19, earthquake conditions 2.25, and rapid drawdown 3.20. In Babadan Lor Village, the normal safety factor value was 3.26, earthquake conditions 2.78, and rapid drawdown 3.20.
Pemanfaatan Limbah Fly Ash sebagai Alternatif Pengganti Semen dengan Teknologi Beton High Volume Fly Ash (HVFA) Ratni Nurwidayati; Abdul Karim; Ade Yuniati Pratiwi; Muhammad Raihan Riandi; Nursiah Chairunnisa
Buletin Profesi Insinyur Vol 7, No 1 (2024): Buletin Profesi Insinyur (Januari-Juni)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/bpi.v7i1.232

Abstract

Kebutuhan terhadap semen meningkat sejalan dengan pembangunan infrastruktur yang terus meningkat. Hal ini dapat menyebabkan pemanasan global sehingga perlu upaya untuk mengurangi pemakaian semen. Di pihak lain, batu bara masih digunakan untuk sumber energi pada industri PLTU. Abu sisa pembakaran menjadi limbah yang perlu dimanfaatkan dalam volume besar sebagai pengganti semen yang disebut dengan High Volume Fly Ash (HVFA) atau beton dengan persentase fly ash (FA) lebih dari 50%. Penelitian ini mengevaluasi waktu pengikatan, sifat mekanik mortar dan beton HVFA. Variasi FA yang digunakan adalah 0%, 40%, 50%, dan 60% dengan tambahan superplasticizer (SP) yaitu viscocrete 1050 sebesar 0%, 0,4%, 0,7%, dan 1%. Hasilnya menunjukkan kuat tekan tertinggi dari mortar dengan FA 40% dengan SP 1% yaitu 23,45 MPa pada umur 28 hari dan beton dicapai pada persentase FA 40% dengan viscorete 1% sebesar 15,66 MPa pada umur 56 hari. Untuk kuat tarik belah beton tertinggi pada persentase FA 40% dengan SP1% sebesar 2,22 MPa dengan nilai konstanta sebesar 0,59. Semakin tinggi persentase variasi FA maka akan semakin rendah nilai kuat tekan dan kuat tarik belah beton. Disamping itu, semakin tinggi persentase SP maka semakin tinggi nilai kuat tekan dan nilai kuat tarik belah.Kata kunci: High Volume Fly Ash, viscocrete, kuat tekan, kuat tarik belah, waktu pengikatan
PERBANDINGAN RESPON GEDUNG SETBACK DAN NON-SETBACK DI BAWAH BEBAN GEMPA Amada, Nur Maeysya Saida; Chairunnisa, Nursiah
INFO-TEKNIK 2023: PROSIDING SEMNAS TAHUNAN X 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v0i0.18641

Abstract

Structure irregularities can affect a building's ability to respond to earthquakes. One of the irregular configurations often encountered is the setback structural system which is a structure with the top of the building protruding inward, causing high vertical irregularities. This study aims to determine differences in earthquakes effect between setback structural systems and non-setback structural systems by seismic response analysis. In this analysis, there are four building models with structure irregularity variations at the same conditions and location as a comparison. Model 1 is a building without vertical irregularities or non-setbacks, while the other three models are setback buildings. The building location for this analysis is Hulu Sungai Utara District in very soft soil site class (E) because the earthquake risk in this location tends to be greater than in other South Kalimantan districts. As the results of this comparative analysis based on the base shear, displacement, and drift values, the best model is model 4, which is a setback building, because the output values are smaller compared to the other three model's output. This result is due to the mass reduction in the setback building model because of vertical geometry irregularity by 150% in the x direction and 366% in the y direction.
PEMODELAN SILINDER BETON DENGAN KEKANGAN CFRP (CARBON FIBER REINFORCED POLYMER) Cahyo, Bagas Dwi; Chairunnisa, Nursiah
Jurnal Teknologi Berkelanjutan Vol 9 No 02 (2020): Vol 09 No 02
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.052 KB) | DOI: 10.20527/jtb.v9i02.183

Abstract

Confinement plays an important role in preventing cracking and premature shear failure, increasing the compressive strength and increasing the ductility of the element. One of the most efficient retrofitting methods is the reinforcement method with external restraints using high quality materials. Based on previous research, the use of external restraints using high quality materials can be in the form of steel wire mesh and wire rope restraints, and high-quality fiber such as CFRP (carbon fiber reinforced polymer). In this research, a study will be conducted to determine the effect of CFRP confinement reinforcement on a concrete cylinder that will be modeled with finite element software. The dimensions of the concrete cylinder used have a height of 300 mm and a diameter of 150 mm. The concrete cylinder is reinforced with CFRP with a thickness variation of 0.5 mm; 0.7 mm; and 1 mm respectively, namely SC.1.05-F, SC.1.07-F, SC.1.10-F. Then the samples with variations in the number of layers of 1 layer, 2 layers, and 3 layers respectively are SC.1.10-F, SC.2.10-F, SC.3.10-F. The last is the sample with a variety of full wrap installation configurations, CFRP with a width of 30 mm with a spacing of 50 mm, and CFRP with a width of 50 mm with a spacing of 50 mm, respectively, namely SC.1.10-F, SC.1.10-T3, and SC.1.10-T5. From the results of the analysis, it can be concluded that CFRP is able to increase the compressive strength of the sample with each increase in the compressive strength capacity of the test object compared to the Control Cylinder (SK). Based on the results of the analysis for all samples SC.1.10-T3, SC.1.10-T5, SC.1.05-F, SC.1.07-F, SC.1.10-F, SC.2.10-F and SC.3.10-F respectively of 10.79%; 25.24%; 33.66%; 39.50%; 49.85%; 78.21%, and 94.5%.
Bimbingan Teknis Pemanfaatan Limbah Abu Batu pada Green Paving Block untuk Pemberdayaan UMKM di Banjarbaru Krasna, Wiku Adhiwicaksana; Chairunnisa, Nursiah; Pratiwi, Ade Yuniati; Nurwidayati, Ratni; Barkiah, Ida; Darmawan, Arya Rizki
Jurnal Pengabdian ILUNG (Inovasi Lahan Basah Unggul) Vol 4, No 3 (2025)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/ilung.v4i3.14333

Abstract

Indonesia merupakan salah satu negara dengan pembangunan infrastruktur yang sangat pesat. Pembangunan sektor jalan merupakan  salah satu pembangunan yang sedang masif dilakukan, terutama pada jalan dengan perkerasan kaku. Perkerasan kaku khususnya paving block banyak digunakan pada tempat khusus yang memerlukan kekuatan lebih untuk menahan beban sekunder. Pengaplikasian paving block pada pembangunan ruas jalan sudah seringkali kita jumpai pada banyak daerah di Indonesia. Penggunaan paving block  juga dinilai lebih ekonomis, efektif dan efisien daripada penggunaan perkerasan beton bertulang, paving block  juga memiliki tingkat kemudahan dalam pemasangannya. UMKM (Usaha Mikro Kecil dan Menengah) penyedia paving block di Banjarbaru hanya mengetahui bahwa pembuatan paving menggunakan semen dan pasir saja, mereka belum mengetahui bahwa paving juga dapat digunakan material limbah. Dalam hal ini Tim Pengabdian kepada Masyarakat Fakultas Teknik mengusulkan penggunaan limbah abu batu sebagai material pengganti pasir dalam pembuatan green paving block. Bimbingan teknis yang dilakukan termasuk penjelasan terkait prosedur pembuatan paving block berdasarkan SNI 03-0691-1996, metode curing atau perawatan, dan metode pengujian paving block. Berdasarkan hasil kuisioner terhadap peserta bimbingan teknis diketahui rata-rata 14,33% menyatakan sangat jelas, 33,33% menyatakan jelas, 47,67% menyatakan cukup jelas, dan 4,67% menyatakan kurang jelas.
Permodelan Perilaku Daktail Balok T pada Beton Mutu Tinggi Syaikhani, Ahmad; Tjitradi2, Darmansyah; Chairunnisa, Nursiah
Nusantara Journal of Science and Technology Vol 2 No 1 (2025): Published in May of 2025
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat (LPPM) Universitas Nahdlatul Ulama Kalimantan Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69959/nujst.v2i1.181

Abstract

The use of reinforced concrete beams using a slender and high quality make manufacturing more efficient, but it could be a problem, especially in terms of deflection and torque occurs. Besides the issue of deflection and torsion of reinforced concrete beams are also vulnerable to shear failure, because the beam will suddenly fall without notice. By increasing the volume of concrete, it will increase the ability of beam bending, shear, ductility and strengthen the torsion beam, but if increasing the volume of concrete will increase the cost and increase the space or want a beam to beam slim in terms of aesthetics . This experiment without increasing the volume of concrete but do in the area of compressed concrete curbs and closed. Experimental models used are high quality concrete T beam with a length of 3.85 m . The number of flexural steel reinforcement 3 pieces with a diameter of 16 mm bending, body reinforcement of 8 mm diameter, 8 mm diameter tensile reinforcement and stirrups of 8 mm diameter (Ramaswamy, 2006). Furthermore, the implementation of a model created in ANSYS with the concrete material was modeled as SOLID 65, Steel material is modeled with SOLID 45, and reinforcing steel were modeled as LINK 8. Then redesign beam experiments with the same capacity so that the beam implementation in detail as reinforced concrete beams with a span length profiles T (L) 3.85 m, height (h) 350 mm, web beam width (bw) 150 mm, effective flens width (be) 375 mm, 450 mm and 600 mm. Beam profile T design used double the number of reinforcement rebars press 6 pieces of 10 mm diameter, reinforced pull 3 pieces of 22 mm diameter, and stirrups were used diameter of 10 mm. The quality of concrete used (fc') = 65 MPa. Flexural yield stress and tensile steel reinforcement is used (fy) = 400 MPa and reinforcement steel stirrups used (fy) = 240 MPa. Analysis of the modeling is done using the finite element method with a variation of the cross bar spacing of 50 mm, 75 mm, and 100 mm. The results showed that the load at the first crack that can be accepted on a concrete T beams with increasingly high quality meeting the local press stirrup spacing increased ( but less significant influence ). Then when the ultimate load on the beam can be accepted T on high strength concrete with closed the local press stirrup spacing increased ( significant influence ). Sengkang also affect the crack, the closer the distance stirrup in the press area will strengthen the concrete and reduce the widening cracks, as seen at the time of the first concrete crack and crack mangalami ultimate. While the effective width also affected, the greater the effective width of high strength concrete T beams will increase the moment capable of being held, so that the beam is getting stronger and greater ductility.
KAJIAN JEMBATAN A-HALF THROUGH ARCH DENGAN SNI 1725:2016 DAN SNI 2833:2016 (STUDI KASUS JEMBATAN RUMPIANG KABUPATEN BARITO KUALA) Chairunnisa, Nursiah; Pratiwi, Ade Yuniati; Cahyadi, Ahmad; Karim, Abdul; Nurwidayati, Ratni; Prakoso, Puguh Budi
JURNAL TEKNIK SIPIL Vol 13, No 1 (2024): Volume 13 Nomor 1 Mei 2024
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v13i1.37056

Abstract

The Rumpiang Bridge is a Half Through Arch type bridge in Marabahan City, Barito Kuala District. This bridge was constructed in 2003 using loading regulations based on the BMS 1992 regulations. In 2016, the government issued the bridge loading regulations SNI 1725:2016, which introduced differences in loading compared to BMS 1992. Therefore, a structural modeling of the bridge was carried out to determine its capacity using the updated loadings from SNI 1725:2016 and SNI 2833:2016. The research utilized the Midas Civil software for assistance. The assessment of the bridge's capacity was based on the deflection values experienced by the bridge. The analysis results indicated that the maximum deflection values occurred under the combination of Static Load Case 1 and Dynamic Load Case 1. For Static Load Case 1, the maximum deflection values at the center span according to BMS 1992 and SNI 1725:2016 were 47.37 cm and 47.25 cm respectively. For Dynamic Load Case 1, the maximum deflection values at the center span according to BMS 1992 and SNI 1725:2016 were 30.108 cm and 28.41 cm respectively. On the other hand, under seismic loading based on SNI 2833:2016, the displacement experienced by the bridge due to the extreme combination 1 was 13.933 mm. Based on the conducted analysis, it is evident that the loading requirements from SNI 1725:2016 yield deflection results that still meet the criteria compared to the loading requirements from BMS 1992.
Co-Authors A Cahyo Legowo Abdul Ghofur Abdul Karim Abdul Karim Abdul Karim Ade Yuniati Pratiwi Ahmad Cahyadi Ahmad Cahyadi **) Aldi Sultan Akbar Amada, Nur Maeysya Saida ANDRI KURNIAWAN Anita Oktavia Arya Rizki Darmawan Cahyo, Bagas Dwi Darmawan, Arya Rizki EN Anugraini Dewi Hesty Heryani Husnul Khatimi Ida Barkiah Iphan Fitrian Radam Irfan Prasetia Mariamah Mariamah Muhammad Raihan Riandi Muhammad Zackyudin Nor Muhammad Alpindi Nurwidayati, Ratni Prakoso, Puguh Budi Ratni Nurwidayati Syaikhani, Ahmad Tjitradi2, Darmansyah Ulfa Fitriati Wiku Adhiwicaksana Krasna