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All Journal Jurnal Sains dan Teknologi APTEK Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Rekayasa Sipil Journal of Engineering and Technological Sciences Proceedings ACES (Annual Civil Engineering Seminar) JURNAL SAINTIS APTEK Jurnal Teknik Sipil Institut Teknologi Padang SAINSTEK Jurnal Teknologi & Rekayasa Sipil BATOBO: Jurnal Pengabdian Kepada Masyarakat Journal of Infrastructure and Construction Technology
Alex Kurniawandy
Universitas Riau
Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Transportation Other

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KINERJA STRUKTUR AKIBAT BEBAN GEMPA DENGAN METODE RESPON SPEKTRUM DAN TIME HISTORY Rendra, Rezky; Kurniawandy, Alex; Djauhari, Zulfikar
Proceedings ACES (Annual Civil Engineering Seminar) Vol 1 (2015): Annual Civil Engineering Seminar (ACES)
Publisher : Proceedings ACES (Annual Civil Engineering Seminar)

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Abstract

Gempa bumi merupakan bencana alam yang sangat sulit diprediksi kapan dan dimana lokasikejadiannya, proses terjadinya relatif singkat tetapi akibat yang ditimbulkan bisa sangatberbahaya. Desain bangunan tahan gempa menjadi suatu hal yang wajib untuk diterapkandalam perancangan suatu bangunan. Untuk mengetahui perilaku struktur akibat beban gempaperlu dilakukan analisis dinamik. Dalam penelitian ini terdapat dua metode dinamik yangdigunakan yaitu metode respon spektrum dan time history. Struktur yang dianalisis dalampenelitian ini adalah Gedung Hotel SKA Pekanbaru. Penelitian ini mengkaji kinerja strukturgedung yaitu story shear, displacement dan simpangan lantai ketika menerima beban gempa.Respon spektrum yag digunakan adalah respon spektrum kota pekanbaru berdasarkan SNI1726-2012 sedangkan riwayat gempa yang digunakan dalam penelitian ini adalah riwayatGempa El Centro, Gempa Mentawai, Gempa Aceh dan Gempa Padang. Analisis denganmetode respon spektrum menghasilkan level kinerja Damage Control (DC) pada arah Xmaupun arah Y. Analisis dengan meggunakan metode time history menghasilkan level kinerjayang berbeda-beda untuk masing-masing gempa. Level kinerja tertinggi yaitu StructuralStability (SS) terjadi pada gempa El Centro dan Gempa Padang. Level kinerja DamageControl (DC) terjadi pada gempa Aceh. Level kinerja paling rendah yaitu ImmediateOccupancy (IO) terjadi pada gempa Mentawai. Level kinerja pada arah X dan Y sama untuksetiap data time history gempa.Kata kunci: Analisa Dinamik, Level Kinerja, Respon Spektrum, Time History.
Respons Struktur Dan Tingkat Kerusakan Portal Baja Akibat Variasi Pembebanan Dinamik Dengan Analisis Riwayat Waktu Non Linier Vomania, Vomania; Suryanita, Reni; Kurniawandy, Alex
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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Currently, steel is widely used as a starting material in the high-rise building structure because it is more effective and efficient. Otherwise, steel has some drawbacks i.e. prone in collapsed due to dynamic loading. Therefore the aim of this research is to determine of response structure due to dynamic loading. The model is an Open Steel Frame building with a height of 35 m along 10 floors. The type of dynamic loads is harmonic sine and cosines, El Centro earthquake. The dynamic loadings are more precise when they were analyzed using the nonlinier time history method. The harmonic loads on the earthquake load structure are magnitude P0 1 kN, 5 kN and 10 kN load, meanwhile used the history of the El Centro earthquake. Dynamic loads that work suddenly, caused the structure undergoes deformations are not fixed and always have a change within a specified time. The results of the study showed that of these three type of loads, the maximum displacement is 143,885 cm, the maximum velocity is -519,599 cm/dt and the maximum acceleration is 3197,623 cm/dt2 load of the structure caused by sinus. Based on this study it can be concluded that the maximum displacement, velocity and acceleration of a maximum load harmonic sine and cosines is directly proportional to the variation of the value of P0 values getting bigger because then the greater the deformation structure anyway.Key words: dynamic loading, response structure, harmonic loading, time history
Pengaruh Waktu Pengadukan Terhadap Nilai Slump Dan Kandungan Udara Serta Kuat Tekan Beton Khaidir, Trifad Mochd; Kurniawandy, Alex; Ermiyati, Ermiyati
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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The compression strength of concrete can be affected by many factors. One of them are water-cement ratio and duration of mixing. The duration of mixing is usually only being estimated by workers and supervisors. In this research, the duration of mixing used are 2, 3, 4, 5, and 6 minutes with water-cement ratio 0,4 and 0,5. The 2 minutes duration of mixing being used as reference. From the result of the research, it can be seen that the value of water-cement ratio can also affect the value of air content and slump. The more liquid water-cement ratio of 0,5 can be produce a higher slump value. The air content and the slump may decrease as the duration of mixing increase, thus the 6 minutes duration has the smallest value compared to other duration. The highest compression strength is 33,12 MPa at 6 minutes for water-cement ratio 0,4 and 35,12 MPa at 5 minutes for water-cement ratio 0,5Keywords: water-cement ratio, compression strength, duration of mixing, air content, fresh concrete
Tinjauan Kuat Tekan Bata Ringan Menggunakan Bahan Tambah Foaming Agent Taufik, Hendra; Kurniawandy, Alex; Arita, Deri
JURNAL SAINTIS Vol 17 No 1 (2017)
Publisher : UIR Press

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Abstract

Bata ringan merupakan bahan bangunan alternatif penganti bata merah untuk dinding bangunan. Pada umumnya berat bata ringan berkisar antara 600-1800 kg/m3. Dalam penelitian ini bata ringan menggunakan foam agent dengan metode CLC (Cellular Lightweight Concrete)yang ditambahkan dengan metode sibtitusi dari berat pasir yang  dicampurkan bata ringan dengan jumlah variasi 0,3%, 0,6%, 0,9%, 1,2%, dan 1,5%. Hasil kuat tekan optimum didapat pada varian 0,9%. Gelembung udara dalam campuran mortar menghasilkan material yang berstruktur sel-sel, yang mengandung rongga udara dengan ukuran antara 0,1 sampai 1,0 mm dan tersebar merata sehingga menjadikan sifat bata yang lebih baik untuk menghambat panas dan lebih kedap udara. Perawatan yang dipakai dengan cara penyimpanan didalam  ruangan. Benda uji yang dibuat dengan ukuran 60x20x7,5 cm bertujuan mengetahui pengaruh foaming agent terhadap kuat tekan bata dengan standar pengujian (SNI, 03-6825-2002). Hasil penelitian nilai kuat tekan pada umur 7 hari yaitu 0,489 MPa, 14 hari 0,578 MPa, dan 28 hari yaitu 0,667 MPa. Hasil penelitian  furnace bata ringan bisa bertahan di suhu < 500ºC. Hasil penelitian akustik dapat meredam suara sebesar 3%. Hasil pengujian SEM dan EDX foaming agent berfungsi sebagai  pembuat gelembung udara yang terdapat antara lekatan agregat dengan pasta semen.
EVALUASI KERENTANAN BANGUNAN GEDUNG TERHADAP GEMPA BUMI DENGAN RAPID VISUAL SCREENING (RVS) BERDASARKAN FEMA 154 Kurniawandy, Alex; Hendri, Andy; Firdaus, Rahmatul
Proceedings ACES (Annual Civil Engineering Seminar) Vol 1 (2015): Annual Civil Engineering Seminar (ACES)
Publisher : Proceedings ACES (Annual Civil Engineering Seminar)

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Gempa adalah pergeseran tiba-tiba dari lapisan tanah di bawah permukaan bumi. Ketikapergeseran ini terjadi, timbul getaran yang disebut gelombang seismik. Ketika terjadi gempa,struktur akan mengalami perpindahan secara vertikal dan horizontal. Gaya gempa arah vertikaljarang mengakibatkan keruntuhan struktur, namun gaya gempa arah horizontal akanmenyebabkan keruntuhan karena gaya ini bekerja pada titik–titik lemah struktur.Rapid Visual Screening (RVS) adalah metode identifikasi suatu bangunan secara cepat tanpaharus menganalisa bangunan dengan menggunakan software. Untuk mengidentifikasi tingkatrisiko suatu bangunan terhadap ancaman gempa bumi, bisa dilakukan dengan RVS pada tahappermulaannya. Kemudian hasil dari RVS bisa menentukan apakah gedung yang di evaluasitersebut berisiko atau tidak, kalau berersiko maka akan dilanjutkan ke evaluasi FEMAberikutnya.Gedung yang mempunyai tidak mempunyai resiko yaitu gedung Rusunawa dan RektoratUniversitas Riau (UR), sedangkan gedung yang harus dilanjutkan untuk dievaluasi denganFEMA lanjutan adalah gedung Faklutas Pertanian (FAPERTA) UR. Gedung FAPERTA URdikatagorikan beresiko karena gedung FAPERTA UR memiliki komponen FEMA 154 yangmenjadi faktor pengurang dari nilai basic score, seperti vertical irregularity, plan irregularitydan tipe tanah.Kata kunci: FEMA 154, Gempa, Rapid Visual Screening
TINJAUAN KUAT TEKAN BATA RINGAN MENGGUNAKAN BAHAN TAMBAH FOAMING AGENT Arita, Deri; Kurniawandy, Alex; Taufik, Hendra
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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Lightweight bricks could be used as the substitute of conventional bricks for building wall materials. Lightweight brick has a weights beetween 600 to 1800 kg/m3. In this research, lightweight bricks were made by trial and errors made by adding combination of 0.3%, 0.6%, 0.9%, 1.2% and 1.5% of foam agent by cellular lighweight concrete (CLC) method. The optimum compresive strength was gain at 0.9% of foam agent. CLC lightweight brick is the type of bricks which is constructed by adding air bubbles/foam agent to mortar mixture. It is necessary for the air bubbles to retain their shapes during the curing process of the mortar without triggering chemical reaction. An airlock was in a mixture of mortar structure of the cells that produce material, which contains the cavity the air with the size of the between 0,1 to 1,0 mm thick and spread uneven so that makes the nature of concrete better to prevent heat and more voice The curing process was performed by storing the samples indoor, in which the room temperatur varies over time. The sample size was 60x20x7.5 cm, made to investigate the impact of foaming agent to the compressive strength of the lightweight bricks. The experiment method was carried out based on SNI 03-6825-2002. As a result, the compressive strength was 0.49 MPa at 7 days, 0.23 MPa at 14 days, and 0.67 MPa at 28 days. In addition, according to the furnace tests, the lightweight bricks resist for heat temperature of 500ºC. Also, The acoustic test results also shows that the lightweight bricks absorb sound by 3%.Keywords : brick light, foam agent, strong press, acoustic monitoring, furnace
A PROPOSAL OF SEISMIC INDEX FOR EXISTING BUILDINGS IN INDONESIA USING PUSHOVER ANALYSIS Kurniawandy, Alex; Nakazawa, Shoji
Journal of Engineering and Technological Sciences Vol 52, No 3 (2020)
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.2020.52.3.2

Abstract

Indonesia has often suffered major earthquake damage over the past 50 years. There are thousands of buildings in earthquake-prone regions that still need seismic evaluation and rehabilitation. One method of evaluating the seismic performance of an existing building is by assessing it using the Japanese seismic index for structures. A basic seismic index can be calculated based on the strength and ductility criteria. The strength and ductility performance of a structure can be obtained by pushing a building until it reaches its maximum deformation capacity. This paper describes a proposal to obtain a basic seismic index using pushover analysis. Its adjustment to determine a seismic demand index by considering seismic hazard in Indonesia was carried out using the capacity spectrum method. Two existing buildings in Indonesia were evaluated. The evaluation result indicated that both buildings were in safe condition. The proposal of the seismic index method can be useful in determining the performance index of existing structures. The ductility index can also be used to estimate the response modification factor of a structure.
Perilaku Kekuatan Baja Tulangan Beton Akibat Kebakaran Rahman, Rezky; Kurniawandy, Alex; Fatra, Warman
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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In general, when a reinforced concrete suffered a fire, a lot of people tend to replace it with anew reinforced concrete, because they assume that the strength of the element structure isalready changing. Though it is possible to keep re-creating the building by recountingstrength structural elements. The purpose of this studywass to know a changing of yield andtensile strength toward concrete-steel reinforced bar after burning at various temperature.Steel reinforced bar used was 13 mm (S13) and 16 mm (S16) in diameter which is the gradewas (BjTS 40) and (BjTS 35), respectively. The yield and tensile strength as receivedcondition of S13 were 432,02 MPa and 583,62 MPa, respectively, and S16 were 369,38 MPaand 514,58 MPa, respectively. The average yield strength of S13 after burning at 600 °C,800 °C, and 1000°C, were 411,78 MPa, 417,80 MPa, and 428,14 MPa, respectively. And thetensile strength of S13 were 563,64 MPa, 568,83 MPa, and 577,83 MPa, respectively. Theaverage of yield strength of S16 were 346,15 MPa, 358,13 MPa, and 362,28 MPa,respectively. And the tensile strength of S16 were 504,94 MPa, 507,05 MPa, and 518,49MPa, respectively. Based on this result, S13 and S16 concrete-steel reinforced bar beforeand after burning were still in the same grade compare to as rechieved. It can be concludedthat the building after fire at a temperature 600 ° C, 800 ° C and 1000 ° C for 1 hour with 2.5cm concrete cover thickness still meet the strength requirements of the building.Keywords: Reinforced Concrete Steel, Yield Stress (fy), Tensile Strength (fu), Burning
Pengaruh Abu Dasar (Bottom Ash) Sebagai Bahan Substitusi Pasir Pada Sebagian Sifat Beton Segar Dan Beton Keras Afrianda, Yogi; Kurniawandy, Alex; Djauhari, Zulfikar
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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The research is a continuation of previous research that aims to obtain the characteristic of fresh and hard concrete using bottom ash as substitute material sand on normal concrete. At this stage of research focused on analyzing the bulk density, workability, permeability and sulfate resistance. The percentage of bottom ash waste that is used are 0% and 30% of the weight of the sand. The results show that using 30% of bottom ash decrease the workability and bulk density on concrete. Meanwhile, the use of 30% bottom ash also increase the value of permeability on the concrete. On testing of sulfate resistance, concrete with 0% of bottom ash increases the compressive strength at age of 28 days, then will decrease at the age of 56 days and 90 days. As well as on the concrete with 30 % of bottom ash, the compressive strength decreases at the age of 56 and 90 days.Keywords : bottom ash, bulk density, workability, permeability, sulfate resistance
Pemanfaatan Abu Terbang (Fly Ash) Sebagai Bahan Subtitusi Semen Pada Sebagian Sifat Beton Segar Dan Beton Keras Panjaitan, Aprizal; Djauhari, Zulfikar; Kurniawandy, Alex
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The research aims to obtain the characteristic of fresh and hard concrete using fly ash as substitute material on normal concrete. It is focused on analyzing the bulk density, workability, setting time, permeability and sulfate resistance. The percentage of fly ash waste that is used are 0% and 30% of the weight of the cement. The results show that using 30% of fly ash decrease the workability and bulk density on concrete. Meanwhile, the setting time with 30% of fly ashsubstitution is faster compared to 0% fly ash substitution. The use of 30% fly ash also increase the value of permeability on those concrete. At the testing of sulfate resistance, concrete with 0% of fly ash increases the compressive strength at ageof 28 and 56 days, then will decrease at the age of 90 days. Meanwhile, for 30 % of fly ash, the compressive strength decreases at the age of 56 and 90 days.Keywords : fly ash, bulk density, workability, setting time, permeability, sulfate resistance
Co-Authors Afrianda, Yogi Alfadhella Ridwan Andy Hendri, MT, Andy Ardison Gutama Arie Putra Arita, Deri Arita, Deri Azhari Azhari Azmi Firnanda Benny Hamdi Rhoma Putra Benny urzikri Rahim Biefanza Rama Djauhari, Dzulfikar Edi Yusuf Adiman Emiral Akbara Eral Lidansyah Ermiyanti Ermiyanti Ermiyati Ermiyati Ermiyati Ermiyati, Ermiyati Fachrurrozi Yusyaf Fela, Chrisfela Wulandari Garcya, Muhammad Gala Gussyafri Halim Kasuma Hanif, Ardian Hendra Taufik Heru Nurcahyo Ibnu Munawar Mizam Igeny Dwiana Darmawan Iskandar Romey Sitompul Ismeddyanto, Ismeddiyanto Istighfar, Irfan Jamil, Hafizd Ahmed Juhariadi Juhariadi Kamaldi, Alfian Khairunnas Lita Darmayanti M Edwar Hidayat Mardani Sebayang Muhamad Yusa Muhammad Afdal Syafikri Muhammad Refi Muhammad Rizky Muhammad Shalahuddin Muhardi Muhardi Muhardi Nakazawa, Shoji Novan, Andre Nugraha, Rendi Adi Nur Alfikri Ockto Perry P Harahap Panjaitan, Aprizal R Arianto Rahman, Rezky Rahmatul Firdaus Rahmatul Firdaus, Rahmatul Ramadhan, Rian Randi Yuzti Ramadhan Reni Suryanita Rezky Rendra Rezky Rendra, Rezky Ridwan Ridwan Rizqy Ridho Prakasa Ronaldi Zulkifli s, Pirmadona Shoji Nakazawa Simamora, Idris David Fernando Siswanto Tarigan, Filemon Tengku Tantoni Yahya Trifad Mochd Khaidir, Trifad Mochd Ucok H Pulungan Vasha Hotmaris Parulian Vomania, Vomania Wahyu Setiawan Warman Fatra, Warman Wirma, Rizki Yaren, Rezha Yayi Suryo Prabandari Yonna Rosianda Yose Inanda Yuri Khairizal Zulfikar Djauhari Zulfikar Djauhari Zulfikar Djauhari