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Zulfikar Djauhari
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Mechanical Engineering Transportation

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KERUNTUHAN PROGRESIF GEDUNG BERATURAN SISTEM GANDA Dhika Fazrian; Zulfikar Djauhari; Ridwan Ridwan
Jurnal Teknik Sipil Vol. 14 No. 3 (2017)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (741.764 KB) | DOI: 10.24002/jts.v14i3.1980

Abstract

Abstract: This research aimed to examine the progressive collapse of dual system building structures due to the loss of one or more structural elements that lead to successive collapse of other elements. Three cases of building structures were analyzed in this study using finite element software. Several columns on the first floor of the structure was removed and then the analysis was conducted to each structure until the progressive collapse existed. The nonlinear statics analysis was used to examine the location of the critical column while the linear statics analysis was carried out to find the demand capacity ratio, the bending moment ratio and robustness indicator as suggested by GSA 2003 and SNI 2847-2013. The results showed that the structure denoted in case 1 and case 2 that was loaded comply with GSA 2003 experienced the progressive collapse. On the other hand this phenomenon did not appear on the structure that was loaded in accordance with SNI 2847-2013. Furthermore, there was an increase in the bending moment capacity of the column/beam on all cases that were loaded comply with SNI 2847-2013 and GSA 2003. Robustness indicator is almost equal one with the type of progressive collapse is pancake collapse type. Abstrak: Penelitian ini bertujuan mengkaji keruntuhan progresif struktur gedung beraturan sistem ganda akibat hilangnya salah satu atau lebih elemen struktur yang menyebabkan keruntuhan secara beruntun elemen yang ada didekatnya. Tiga kasus struktur bangunan dianalisis dalam penelitian ini dengan menggunakan perangkat lunak berbasis elemen hingga. Beberapa kolom di lantai petama pada struktur dihilangkan dan dianalisis hingga struktur mengalami keruntuhan progresif. Analisis statik nonlinier digunakan untuk menge-tahui bagian kolom kritis dan analisis statik linier untuk mengetahui nilai rasio kapasitas, momen lentur, dan ketahanan batas sesuai dengan kriteria GSA 2003 dan SNI 2847-2013. Kesimpulannya adalah terjadi keruntuhan progresif sesuai kriteria GSA 2003 pada kasus 1 dan kasus 2. Sedangkan untuk kriteria SNI 2847-2013 tidak terjadi keruntuhan progresif. Terjadi peningkatan momen lentur pada setiap kasus sesuai kriteria GSA 2003 maupun SNI 2847-2013 dan nilai ketahanan batas mendekati satu dengan tipe keruntuhan progresif adalah pancake.
RESPONS STRUKTUR JEMBATAN BETON PRATEGANG BERDASARKAN SPEKTRUM GEMPA WILAYAH SUMATERA Reni Suryanita; Zulfikar Djauhari; Andi Wijaya
Jurnal Sains dan Teknologi Vol 15, No 1 (2016): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (945.335 KB) | DOI: 10.31258/jst.v15.n1.p18-24

Abstract

 Perencanaan struktur jembatan beton prategang pada daerah yang memiliki risiko kegempaan khususnya di wilayah Sumatera, harus memperhatikan kemampuan respons strukturnya. Dalam penelitian ini respons struktur jembatan berupa perpindahan, kecepatan, dan percepatan dianalisis berdasarkan Peta Spektra Gempa Indonesia. Penelitian ini bertujuan untuk mengidentifikasi respons maksimum struktur jembatan beton prategang di lokasi kegempaan pulau Sumatera. Untuk mengetahui respons struktur jembatan, maka dilakukan pemodelan yang mengacu pada studi kasus pembangunan jembatan beton prategang di Kecamatan Tapung, Kabupaten Kampar. Struktur jembatan ini dimodelkan menggunakan software elemen hingga, dengan analisis respons spektrum gempa berdasarkan RSNI 2833-201X. Lokasi gempa yang dianalisis adalah 11 ibu kota provinsi di wilayah gugusan pulau Sumatera dengan 3 kondisi jenis tanah yaitu tanah keras, tanah sedang dan tanah lunak. Dari hasil analisis diperoleh respons struktur jembatan terbesar terjadi di Kota Banda Aceh, dengan nilai perpindahan maksimum sebesar 0,01595 meter, nilai kecepatan sebesar 0,4552 m/det dan nilai percepatan sebesar 9,7 m/det2. Diharapkan dengan diketahuinya respons maksimum pada kota-kota tersebut dapat memberikan acuan bagi perencana struktur dalam mendesain struktur Jembatan yang kokoh di masa mendatang.
Simulasi Numerik Kurva Hubungan Momen Dan Kurvatur Balok Beton Bertulang Dengan Variasi Penampang Heru Setiadi; Zulfikar Djauhari; Reni Suryanita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Beam as one of structural elements is generally designed to exhibit ductile behavior before failure. The ductility of the whole structure is affected by the characteristic of its structural elements. The ductility of reinforced concrete (RC) beam could be measured by curvature ductility parameter. Curvature ductility is defined as the ratio between the beam curvature at ultimate state and yielding state. The ductility curvature value can be calculated based on the moment-curvature curve. One of the structural analysis softwares that can be used to produce the moment-curvature relationship curve is Response2000. This research aims to analyze the impact of varying the reinforced concrete beam characteristics to the ductility of the beam which is performed using Response2000 software to model the singly-reinforced concrete beam. By varying the concrete compressive strength, reinforcing bar (rebar) strength and diameter, reinforcement ratio, and concrete section (width and depth of concrete), 38 models of beam were generated. Based on the analysis results, it was observed that the increment of concrete compressive strength and effective depth increases curvature ductility, whereas the increment of rebar strength and reinforcing ratio reduces curvature ductility. Manual calculations on the curvature ductility showed that the output produced by Response2000 only the average difference from the manual calculations is 15,361%. This indicates that Response2000 is a reliable tool to calculate the curvature ductility of reinforced concrete beam.Keywords: ductility, reinforced concrete, moment, curvature, Response2000
Pengaruh Variasi Volume Konsentrasi Bakteri Bacillus Subtilis Terhadap Sifat Fisik Beton Fajar Priandoko; Zulfikar Djauhari; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In general, construction in Indonesia still uses concrete as a building material. It is proven by more than 60% of projects in Indonesia were using concrete as its construction material. Starts from the simplest constructions to the complex technology projects, concrete becomes an inevitable need. Concrete has several advantages and disadvantages. The problem that often occurs in concrete is it can crack either due to physical changes from the concrete itself or external influences. One way to solve this problem is to use the Bacillus Subtilis bacterium as a concrete mixture. This bacterium is capable of repairing cracks in concrete. That is why this research will use BacillusSubtilis bacteria with different variations in volume concentration, it will be 105 cells / 20 ml, 105 cells / 25 ml and 105 cells / 30 ml as much as 25 ml in castings of 0.1 m3. This research will investigate the physical properties of concrete, which are workability, porosity, and shrinkage of concrete. The test objects are cylindrical and soaked in normal water for 28 days and 56 days. The workability test results showed the highest slump value obtained in bacterial concrete with a concentration of 105 cells / 30 ml with a slumpvalue of 12 cm. The lowest porosity values of 28 and 56 days ages were obtained in bacterial concrete concentrations of 105 cells / 20 ml with porosity values of 12.83% and 10.31%, respectively. The concrete bacteria concentration of 105 cells / 20 ml also has the smallest shrinkage value of 0.064 mm. The addition of Bacillus Subtilis bacteria witha concentration of 105 cells / 20 ml was the most optimal of all variations of theconcentration used to the physical properties test of concrete.Keywords: Concrete, Volume Concentration, Bacillus Subtilis, Physical Properties
Pengaruh Variasi Volume Konsentrasi Bakteri Bacillus Subtilis Terhadap Sifat Mekanik Beton Yuridho Alfi; Zulfikar Djauhari; Iskandar Romey Sitompul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Concrete is the most favourite material used in construction. Concrete has some advantages, but in some cases, concrete also has drawbacks. One of the drawbacks founds during the use of concrete is that its tensile strength is low when the tensile strength of concrete is exceeded the cracks will exist. The inovation to solve this is theintroduction of self healing concrete that utilize bacteria bacillus subtilis in a concrete mix. This bacteria can repair cracks in concrete. In this research, bacteria bacillus subtilis were used with different concentration that is 105 cells/20 ml, 105 cells/25 ml and 105 cells/30 ml. Mechanical properties test carried in this research, namelycompressive strenght and flexural strength. The test consist of two loading types namely broken cracks where the concrete was loaded until it fully destroyed and loading up until initial cracks occured. The test was carried after 28 and 56 days of curing. Theresult shown that the concrete with 105 cells/20 ml concentration of bacillus subtilis had the highest compressive strength with increasement by 28,70 % and 34,50 % than normal concrete at 28 and 56 days. The highest flexural strength value has shown in concrete with 105 cells/20 ml.Keyword : Concrete, Cracks, Bacillus Subtilis, Mechanical Properties, Compressive Strength, Flexural Strength
Evaluasi Kerentanan Bangunan Gedung Terhadap Gempa Bumi Dengan Rapid Visual Screening (RVS) Berdasarkan Femad 154 Rahmatul Firdaus; Alex Kurniawandy; Zulfikar Djauhari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Earthquake is a disaster that could bring a disadvantage on society, either materials or lifes. Although Pekanbaru City is not a city with numerous of earthquakes, but Pekanbaru City had ever felt the impact of the earthquake on September, 2009. The earthquake took place on West Sumatera, was caused by frictions between two plates, which were Eurasia Plate and Indo-Australia Plate. To anticipate a bad impact that would happened by earthquake, therefore it is necessary to evaluate the building`s vulnerability against earthquake by using FEMAP 154. The vulnerability of the each buildings toward earthquake are different. This is based on the non structural components on the buildings which would influenced the evaluation result later. From the research, it shown that the vulnerability of the buildings in some places in Pekanbaru City are quite well. It proved by the building`s vulnerability analysis against earthquake had fulfilled the evaluation of FEMAP 154 Keywords : Earthquake, Vulnerability, FEMAP-154.
Pengaruh Penambahan Abu Dasar (Bottom Ash) Sebagai Bahan Pengganti Pasir Pada Paving Block Rezky Yusman Efendy; Zulfikar Djauhari; Ermiyati Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This research aims to study the effect of bottom ash as substitute of sand in paving block and to classify each percentage of substitution according to SNI 03-0691-1906 Bata Beton (Paving Block) class specification. The mixture of cement and sand used in this study was 1 : 3. The variation of substitution started from 0%, 10%, 20%, 30%, 40% of sand weight. Tests performed on paving block include compressive strength, water absorption, Na2SO4 immersion test. The results shown by this research that water absorption test at substitution 0%, 10%, 20%, 30%, 40%, were 5.76%, 6%, 5.83%, 7.16%, 7.49%. According to SNI 030691-1906 “Bata Beton” (Paving Block) to water absorption test results, 0%, 10%, 20%, were categorized as B quality paving block, and 30%, 40% were categorized into C quality paving block. The results shown by this research that compressive strength test at substitution 0%, 10%, 20%, 30%, 40% were 31.80 MPa, 27.30 MPa, 29.61 MPa, 19.97 MPa, 16.41MPa. According to SNI 03-0691-1906 Bata Beton (Paving Block) to compressive strength test results, 0%, 10%, 20%, were categorized as B quality paving block, and 30%, 40%, were categorized into C quality paving block. Keywords: Paving Block, Bottom Ash, Water Absorption, Natrium Sulfate, and Compresive Strength
Pemanfaatan Abu Ampas Tebu Sebagai Bahan Substitusi Semen Terhadap Karakteristik Bata Beton Pejal Afwan Eka Putra; Zulfikar Djauhari; Enno Yuniarto
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The use of bagasse ash in the manufacture of solid concrete bricks is one way of saving in the use of cement. Concrete brick is a type of brick-shaped building material made from the main ingredients of portland cement, water, and aggregates used for wall pairs. The study of the use of bagasse ash aims to determine the effect of bagasse ash on the quality of concrete bricks, namely in terms of compressive strength and water absorption. Comparison of the mass of cement with sand is 1: 4. The method used is to conduct experiments in the laboratory. The results showed that the relationship between compressive strength and concrete brick water absorption was inversely proportional. The greater the compressive strength of the concrete brick, the smaller the absorption value of the water and vice versa. In terms of compressive strength, the maximum value of using bagasse ash to obtain concrete brick of quality level I is the percentage of 22.5% with a compressive strength of 103.077 kg / cm2. The conclusion that can be taken in this study is the use of bagasse ash can reduce cement usage by 30% in the manufacture of concrete bricks. This is evidenced by the results of the quality of concrete bricks obtained still meet the requirements of SNI 03-0349-1989 with a quality level II. Keywords: Solid concrete brick, bagasse ash, compressive strength, water absorption
Sifat Mekanis Beton Dengan Menggunakan Steel Slag Sebagai Bahan Subtitusi Agregat Halus Dan Fly Ash Sebagai Bahan Subtitusi Semen Yonna Rosianda; Alex Kurniawandy; Zulfikar Djauhari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The purpose of research is to identify the mechanical properties of concrete by using steel slag as subtitution for fine aggregates and fly ash as subtitution cement on concrete with the quality (f`c) 25 MPa. The research meant to review the permeability, porosity and load power of concrete. The proportion of steel slag and fly ash which was used is 0% and 20% of total weight of fine aggregates and cements. The permeability and porosity test was done on 28 days soaked concrete. For the pressure test, it was done on 28 days and 56 days soaked in normal water. The result of the test shown that the using of 20% steel slag and 20% fly ash liably improved the permeability and porosity of the concrete. On the normal concrete-pressure test, it was improved as well for 28 and 56 days soaked concrete. Meanwhile, the concrete with steel slag and fly ash as subtitution was also shown an improvement on 28 days and 56 days`s pressure test.Keywords : Steel slag, fly ash, Permeability, Porosity, Compressive strength.
Pengaruh Kombinasi Fly Ash Dan Bottom Ash Sebagai Bahan Substitusi Pada Campuran Beton Terhadap Sifat Mekanis Tengku Tantoni Yahya; Alex Kurniawandy; Zulfikar Djauhari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Fly ash and bottom ash were waste that generated from the power plant burning coal process. Fly ash and bottom ash has the potential to be developed as a basic ingredient in concrete composites. This research aimed to obtain the properties of fresh concrete and hard concrete of the combined effect of fly ash and bottom ash as a substitute ingredient in composite concrete. This research has examined the influence of a combination of waste fly ash and bottom ash to the compressive strength of absorption, porosity, permeability, shrinkage of concrete, setting time of cement. The percentage of fly ash waste and bottom ash waste that used were 15% by weight of cement and 15% of the weight of the sand. Research results show that using of 15% fly ash and 15% bottom ash was tending to decrease the compressive strength of concrete. However, the compressive strength was generated still whitin the standard of concrete strength design. Applicaton of 15% fly ash and 15% bottom ash were experiences to increase the value of absorption, permeability and concrete porosity, but reduce the concrete shrinkage. Meanwhile, setting time of 15% fly ash and 15% bottom ash were faster than without any composite.Keywords : concrete, fly ash, bottom ash, permeability, shrinkage, setting time.
Co-Authors Afwan Eka Putra Ahmad Obi Narman Ahmad Zulfitri Alex Kurniawandy Andi Wijaya Anggi Agusstiawan Ardian Yolanda Bagus Rizkya putra Debby Mayangsari Dhika Fazrian Dian Nanda Islami Enno Yuniarto Ermiyati Ermiyati Fajar Priandoko Florisa Florisa Garcya, Muhammad Gala Harriad Akbar Syarif Heru Setiadi Ilham Sordiman Iskandar Romey Sitompul Ismeddyanto, Ismeddiyanto Kurnia Desmilestari Mirza Afrian Monita Olivia Muhammad Gilang Indra Muhammad Rizky Nasrullah Nasrullah Nevita Elisa Ockto Perry P Harahap Prayogo Pratama Rachmat Hidayat Rahmatul Firdaus Randi Yuzti Ramadhan Reni Suryanita Rezky Rendra Rezky Yusman Efendy Ridwan Ridwan Ridwan Ridwan Roni Suhendra Suriyati Suriyati Suziela Saila Syamsul Fikri Tengku Tantoni Yahya Widika Arfa A Yonna Rosianda Yuridho Alfi