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ALTERNATIVE DESIGN OF THE BUILDING STRUCTURE OF STEEL FRAME BRIDGE TYPE STEEL ARCH WITH WARREN FRAME IN TUKAD BANGKUNG BRIDGE IN BADUNG - BALI Sudirman Indra; Mohammad Erfan; I Komang Dedi Wijaya
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 1 No. 1 (2020): Journal of Sustainable Technology and Applied Science, May 2020
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v1i1.2610

Abstract

In planning and designing a bridge it should consider the function of transportation needs, technical and architectural-aesthetic requirements which include: Traffic aspects, Technical aspects, Aesthetic aspects. the alternative bridge design structure of the steel arch bridge-type steel frame with warren frame on the Tukad Bridge in Bangkung district. Badung - Bali is a steel frame bridge that has an overall span of 360 m and 9.6 m wide. alternative upper structure at the Tukad Bangkung bridge Badung Regency - Bali with the merging of the steel arch construction of 2 roller joints and the warren frame structure. Where between the curve/arc with a steel profile plate connected by a cable that serves to provide strong support to the frame structure because of the long stretch. In the planning of the bridge this time using the L.R.F.D method and for the structural analysis modeling the writer uses the STAADPRO V8i assistive program. From the analysis of the results of the calculation of the structure above obtained planning dimensions of the Steel Arch bridge that is planned to use a steel profile, WF 350 x 175 x 7 x 11 for gel. elongated, WF 918 x 303 x 19 x 37 for gel. transversely, WF 350 x 350 x 12 x 9 for gel. transversely above, WF 498 x 432 x 45 x 70 for gel. parent, LD 250,250.25 for wind bonds.
PENGARUH VARIASI JUMLAH TUMBUKAN: Pada Campuran Aspal HRS-WC Dengan Penambahan Karet Alam (Lateks) Akhmad Rahardeans Maulana; Mohammad Erfan; Eri Andrian Yudianto
STUDENT JOURNAL GELAGAR Vol. 3 No. 1 (2021): JURNAL GELAGAR
Publisher : TEKNIK SIPIL S-1 ITN MALANG

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Abstract

Increasing traffic volume which is increasing rapidly can result in a level of damage such as deformation of the road surface layer caused by the influence of excessive traffic load (overload), it is necessary to have a good quality pavement mix planning. Latex is a type of natural rubber which has high resistance to cracking and has high wear resistance. Improve the quality of the asphalt mixture with the addition of natural rubber (latex) as an additive which is expected to improve the characteristics of the pavement. Meanwhile, for the use of fly ash filler, each additional level results in a lower flow value, therefore this study is expected to produce a better HRS-WC pavement mixture.This study aims to determine the effect of variations in the number of collisions and also the feasibility of latex as an added material, fly ash as a filler in the HRS-WC layer. With a variation of the collision 2x65,2x70,2x75,2x80,2x85.The test results of the effect of variations in the number of collisions on Marshall characteristics that have been carried out produce a value that meets the specifications set by the Public Works Office of Bina Marga 2018 including testing: aggregate absorption test 2.89%> 3%, specific gravity 2.29 gr / cm2> 2.5 gr / cm. Obtained a stability value of 946.82 kg, a flow value of 3.54 mm, a VIM value of 4.06%, a VMA value of 17.29%, an MQ value of 270.54 kg / mm, a VFA value of 76.39% So that the optimum number of collisions is 76. Thus it can be declared that it meets the requirements of the HRS-WC specification.
PENGARUH PEMAKAIAN FLY ASH SEBAGAI CEMENTITIOUS PADA BETON MUTU TINGGI TERHADAP KUAT TEKAN BETON UMUR 28 – 91 HARI Tharsisius Floridus Luan; Mohammad Erfan
SONDIR Vol. 4 No. 1 (2020): Jurnal Sondir
Publisher : Institut Teknologi Nasional Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/sondir.v4i1.3158

Abstract

Pada dasarnya, fly ash mempunyai bentuk butiran partikel sangat halus sehingga dapat menjadipengisi rongga-rongga (filler) dalam beton sehingga mampu meningkatkan kekuatan beton dan menambahkekedapan beton terhadap air serta mempunyai keunggulan dapat mencegah keretakan halus (crack) padapermukaan beton. Penambahan fly ash pada campuran beton bersifat pozzolan, sehingga bisa menjadi bahantambah mineral yang baik untuk beton. Dalam pembuatan beton pada umumnya, pengujian kuat tekan betondilakukan pada umur 3, 7, 14, dan 28 hari, dimana peramalan kekuatan beton selalu dikonversikan ke umur28 hari, karena dianggap kekuatan beton telah mencapai 100% mutu rencana dan dianggap stabil sampaipada umur seterusnya. Akan tetapi dengan pemakaian fly ash pada beton yang tidak terlepas dari sifat fly ashitu sendiri yang dapat mempengaruhi proses hidrasi semen. Penilitian mencari tahu pengaruh pemakaian flyash pada beton mutu tinggi di umur 28 – 91 hari. Total benda uji sebanyak 50 sampel, dimana 1 variasi umurterdapat 5 sampel. Variasi umur yang diberikan adalah 28 hari, 35 hari, 42 hari, 49 hari, 56 hari, 63 hari, 70hari, 77 hari, 84 hari, dan umur puncak pada 91 hari dengan mutu f’c 50 MPa. hasil pengujian hipotesis dananalisa regresi, dimana thitung = 8,103 > ttabel = 3,182 dengan nilai determinasi (R²) = 89,14%, dankoefisien korelasi (R) sebesar 0,9441. Perubahan kuat tekan beton sebesar 56,93 MPa (13,86%) – 64,52 MPa(29,03%) diatas kuat tekan yang direncanakan f’c 50 Mpa pada umur 28 hari - umur 91 hari denganpemakaian fly ash 40% pada campuran beton. semakin sedikit penggunaan air dan semakin kecil faktor W/C(berat air dibagi berat semen) menghasilkan mutu beton yang tinggi, akan tetapi dengan menggunakansuperplasticizer yang memudahkan proses pengerjaan dan kelecakan (workability) pada campuran tersebut.hal ini dibuktikan dengan tercapainya mutu beton f’c 50 MPa pada umur 28 hari sebesar 56,93 MPa dengannilai faktor air semen 0,316. Kuat tekan maksimum pada umur 91 hari dengan nilai kuat tekan sebesar 64,52MPa dengan persentase kenaikan kuat tekan sebesar 29,03% dari mutu rencana. Hal ini dapat diperkirakanadanya kenaikan kuat tekan diatas 91 hari ditinjau dari arah kurva analisa regresi yang belum stabil.
MODEL PENGUKURAN KELELAHAN PEKERJA KONSTRUKSI DENGAN JARINGAN SARAF TIRUAN / NEURAL NETWORK: Pengukuran Kelelahan Pekerja Konstruksi Dengan Jaringan Saraf Tiruan / Neural Network Darmawan Sastra Negara; Mohammad Erfan; Annur Ma'aruf
STUDENT JOURNAL GELAGAR Vol. 2 No. 2 (2020): JURNAL GELAGAR
Publisher : TEKNIK SIPIL S-1 ITN MALANG

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Abstract

In implementing construction projects, it is necessary to pay attention to the implementation of Occupational Safety and Health (K3), which is an effort to prevent work accidents in the work environment. The purpose of K3 is to maintain the health and safety of the work environment and also to protect colleagues, workers' families, consumers, and other people who may also be affected by working conditions. Measurement of worker fatigue will be carried out using the Neural Network approach method. Neural Network is a machine learning algorithm that mimics how the neural networks of living things work. An artificial neural network is a network of many small processing units (called neurons), each of which performs a simple process, which when combined, results in complex behavior. Artificial neural networks can be used as a tool to model complex relationships between input and output in a system to find patterns in data. The test results on the neural network modeling show a high level of accuracy that is equal to 96%. Thus the results of this Neural Network can be trusted, because it has a level of accuracy close to the real / actual situation where the results of the numbers are close to 100% of the actual events.
STUDI ALTERNATIF PERENCANAAN STRUKTUR ATAS FLYOVER MANAHAN DENGAN KONSTRUKSI BOX GIRDER PRATEGANG METODE SPAN-BY-SPAN: Studi kasus : Jalan layang / flyover Manahan, Surakarta, Jawa Tengah NOVANDA ERWAN SAPUTRA; Ester Priskasari; Mohammad Erfan
STUDENT JOURNAL GELAGAR Vol. 2 No. 2 (2020): JURNAL GELAGAR
Publisher : TEKNIK SIPIL S-1 ITN MALANG

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Abstract

The design of the Manahan flyover uses a prestressed box girder with an external tendon system to streamline the combination of the relatively small volume of concrete and the prestressing force of the tendons so that a relatively small deflection is obtained in the span. The use of prestressed box girders is more profitable than the I-girder beam at a level crossing of the Solo - Yogyakarta railroad track after the Jl. Adi Sucipto - Jl. MT Hariyono towards Jl. Dr. Moewardi, Surakarta City because the method of implementing the I-girder beam causes more traffic jams. Statics analysis uses certain static and segmental implementation methods (span-by-span method) to obtain section properties of the box girder cross section. The rules that the author uses in the calculation are SNI 1725-2016, SNI 2847-2013. The discussion materials include tendon layout planning, loss of prestressed force, control of stress and deflection, box girder-shear reinforcement, and end block. The prestressed cable used is the VSL tendon type GC Grade 270, low relaxation strand type 6-37 units. The results obtained from the pre-stressed box girder planning are used 20 segmentals which are divided into 3 types of segments, namely the pedestal segment, the deviator segment, and the standard segment. Using 12 VSL type GC tendons with 35 strands per tendon. The deflection that occurs is 5.194 cm ( ) and there is no tensile stress.
STUDI ALTERNATIF BATU PUTIH (LIMESTONE) SEBAGAI PENGGANTI AGREGAT 10/10: Studi Kasus Batu Putih (Limestone) Sebagai Pengganti Agregat 10/10 Pada Lapis Aspal Beton AC-WC (Asphalt Concrete-Wearing Course) Muhammad Danang Pratama Kuswanto; Bambang Wedyantadji; Mohammad Erfan
STUDENT JOURNAL GELAGAR Vol. 3 No. 1 (2021): JURNAL GELAGAR
Publisher : TEKNIK SIPIL S-1 ITN MALANG

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Abstract

The limitation of river stone material sources for road pavement on the island of Madura is increasing the shortage of times. However, in this area there is abundant and easy to find white stone material. Thus, this study took an alternative study of limestone limestone as a substitute for the 10/10 aggregate in the AC-WC mixture. White stone material obtained from the village of Soccah Kab. Bangkalan, Madura Island. The purpose of this research is to determine the feasibility and influence of the white stone from Soccah Kab. Madura Island Bangkalan as a substitute for the aggregate 10/10 in terms of the Marshall characteristic value. The next step is to plan the manufacture of 45 samples with white stone variations of 25%, 50% 75%, 100%. Using the percentage of KAO from river stones 5.80% and KAO white stones 5.84% which was carried out from February to May 2020 construction materials laboratory of Civil Engineering, National Institute of Technology Malang. From the results of research white stone as a substitute for aggregate 10/10 in the AC-WC mixture is suitable for use, it can be seen from the value of Stability, Flow, VIM, VMA, MQ, and VFA which meet the specifications of Bina Marga 2018. AC-WC has influenced the characteristic value of Marshall which is significant as evidenced by the results of hypothesis testing where Fcount 3.501 > Ftable 3.48. The optimum percentage of use of white stones is at a variation level of 60.53%. With a stability value of 1046.40 kg, Flow 3.25 mm, VIM 4.19%, VMA 16.98%, MQ 322.49 kg/mm, and VFA 75.34%.
PENGARUH LIMBAH BATU MARMER SEBAGAI PENGGANTI AGREGAT KASAR 10/10 : Studi kasus lapisan ATB ( Asphalt Treated Base) terhadap nilai karakteristik Krindho; Togi H. Nainggolan; Mohammad Erfan
STUDENT JOURNAL GELAGAR Vol. 3 No. 1 (2021): JURNAL GELAGAR
Publisher : TEKNIK SIPIL S-1 ITN MALANG

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Abstract

The composition of the pavement material greatly determines the quality of the asphalt pavement mixture, considering that marble waste from marble stone processing in Gamping Village, Campurdarat District, Tulungagung Regency is not used as a building material, therefore this study aims to determine whether marble waste is suitable for use as a substitute for mountain rock aggregates. or black stone as a mixture of asphalt pavement. And what percentage of the recommended amount of marble waste is used. Based on previous research, it is known that marble stone waste has characteristics as a substitute for coarse aggregate, this study aims to determine the content of marble stone waste as a substitute for coarse aggregate 10/10 in the ATB layer, by examining its levels. marble waste 25%, 50%, 75% and 100%. From the results of the research conducted, it is found that: (1) Aggregates meet specifications and are suitable for use as a mixture of road pavements. (2) Marble stone waste as a material from coarse aggregate 10/10 on the ATB layer has an effect or gives a significant difference. This can be seen from the test results, where Fcount> Ftable. The stability value at 0% marble content was 1048.56 kg and at 100% marble content was 938.32 kg. the expected criteria value in the mix of limits set by the 2018 Highways Agency such as the value of stability, flow, VIM, VMA, VFA and MQ.
STUDI PERENCANAAN STRUKTUR ATAS GEDUNG MENGGUNAKAN SISTEM GANDA (DUAL SYSTEM): Studi Kasus : Gedung Apartemen Begawan Malang Pilar Saktiawan; Ester Priskasari; Mohammad Erfan
STUDENT JOURNAL GELAGAR Vol. 3 No. 1 (2021): JURNAL GELAGAR
Publisher : TEKNIK SIPIL S-1 ITN MALANG

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Abstract

Indonesia is one of the countries that is very prone to earthquakes, one of the causes is that Indonesia is sandwiched between 3 earth plates which allows a shift between these plates so that it can cause earthquakes. Therefore it is necessary to anticipate efforts to improve the quality of infrastructure development such as high-rise buildings that are designed to be able to withstand the forces of the earthquake that occur in order to minimize structural damage to the building and the presence of casualties. The building to be reviewed is the Begawan Malang apartment building. In connection with this, the authors try to conduct a planning study on the Begawan Malang apartment building using a dual system (Dual System), namely a special moment-bearing frame system and structural or shear walls. In which this paper will focus on the planning of the reinforcement of structural elements of beams, columns and walls as well as knowing the detailed drawings of the reinforcement in the structure of beams, columns, beam column relationships, and shear walls of the plan. Where are the results of the planning, with the reinforcement design obtained on beams with dimensions of 450 mm x 750 mm with longitudinal reinforcement in the right and left support areas, namely 4D29 tensile reinforcement and 3D29 compression reinforcement and in the field area with 2D29 tensile reinforcement and 3D29 compression reinforcement. For column elements with dimensions of 900 mm x 900 mm, longitudinal reinforcement is obtained 28D32 and transverse reinforcement in the plastic hinge area 4 ∅ 12 - 80 mm, the outer area of ​​the plastic hinge: 4 ∅ 12 - 100 mm, and the area of ​​the through connection: 4 ∅ 12 - 100 mm. And the structural wall (shearwall) has dimensions of 4200 mm x 450 mm with 40D32 longitudinal reinforcement and transverse reinforcement in the boundary area ∅ 12 - 120 mm and in the area of ​​the shear wall 12 - 300 mm.
PERENCANAAN STRUKTUR BAWAH (ABUTMENT) PADA PEMBANGUNAN JEMBATAN PETAK, KABUPATEN NGANJUK: Studi Kasus : Pembangunan Jembatan Petak, Kabupaten Nganjuk Sandika Prasetyo; Ester Priskasari; Mohammad Erfan
STUDENT JOURNAL GELAGAR Vol. 3 No. 1 (2021): JURNAL GELAGAR
Publisher : TEKNIK SIPIL S-1 ITN MALANG

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Abstract

Borepile foundation is a type of deep foundation, which has several advantages compared to pile foundation. The advantage of the borepile foundation is that it does not provide ground vibrations, can penetrate rocks, and does not cause land level rise, considering that the area around the bridge is a densely populated settlement. With the existing steep river conditions, a strong abutment planning is also required to withstand the soil pressure behind the abutment. This planning aims to determine the dimensions and amount of reinforcement in the abutment and borepile foundation according to the needs. The structural loads of the bridge that work on the abutment refer to SNI-1725-2016 and SNI-2833-2016. The method used to calculate the bearing capacity of the bored pile foundation is the Mayerhoff method. From the planning results, the dimensions of the abutment are 6.5 m high, 6 m wide, and 12 m long. From the calculation results, the basic reinforcement of the abutment body is D29 - 100 with dividing reinforcement D19 - 200 and shear reinforcement D13 - 400. Whereas the x direction pilecap reinforcement is installed with D25 - 125 and the y direction reinforcement D25 - 165 with dividing reinforcement D16 - 200. used is the bored pile foundation D = 80 cm with a depth of 14 m. For the bearing capacity of a single pile foundation Qa = 3896.25 kN while the bearing capacity of the pile group of Qpg = 39411.556 kN. The reinforcement used for the foundation is 14 D22 with spiral reinforcement D12-80. The result of a single pile settlement is 7.14 cm> 8 cm. It can be concluded that the abutment design and bored pile foundation can be used in the construction of the Petak Bridge, Nganjuk Regency.
ALTERNATIF DESAIN STRUKTUR BANGUNAN ATAS JEMBATAN RANGKA BAJA TYPE STEEL ARCH DENGAN RANGKA WARREN : PADA JEMBATAN TUKAD BANGKUNG DI KAB. BADUNG – BALI I Komang Dedi Wijaya; Sudirman Indra; Mohammad Erfan
SONDIR Vol. 4 No. 1 (2020): Jurnal Sondir
Publisher : Institut Teknologi Nasional Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (472.224 KB) | DOI: 10.36040/sondir.v4i1.2543

Abstract

Dalam perencanaan dan perancangan jembatan sebaiknya mempertimbangkan fungsi kebutuhan transportasi, persyaratan teknis dan estetika-arsitektural yang meliputi : Aspek lalu lintas, Aspek teknis, Aspek estetika. jembatan alternatif desain struktur bangunan atas jembatan rangka baja type steel arch dengan rangka warren pada jembatan tukad bangkung di kab. badung – bali merupakan jembatanrangka baja yang memiliki bentang keseluruhan 360 m dan lebar 9,6 m. alternatifstruktur atas pada jembatan Tukad Bangkung Kabupaten Badung - Bali dengan penggabungan antara konstruksi baja pelengkung / busur ( Steel Arch ) 2 sendi rol dan struktur rangka warren. Dimana antara pelengkung / busur dengan pelat profil baja dihubungkan dengan kabel yang berfungsi memberikan dukungan kekuatan pada struktur rangka tersebut oleh karena bentangan yang panjang. Pada perencanaan jembatan kali ini menggunakan metode L.R.F.D dan untuk pemodelan analisa struktur penulis menggunakan program bantu STAADPRO V8i. Dari analisa hasil perhitungan struktur atas didapat dimensi perencanaan jembatan Steel Arch yang di rencanakan menggunakan profil baja, WF 350 x 175 x 7 x 11 untuk gel. memanjang, WF 918 x 303 x 19 x 37 untuk gel. melintang, WF 350 x 350 x 12 x 9 untuk gel. melintang atas, WF 498 x 432 x 45 x 70 untuk gel. induk, LD 250.250.25 untuk ikatan angin.