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INDONESIA
Teknisia
Published by Universitas Islam Indonesia
ISSN : 08538557     EISSN : 27460185     DOI : 10.20885/teknisia
Core Subject : Engineering,
Engineering
Jurnal Teknisia terbit pertama kali pada bulan April 1996. Pada awal berdirinya, Jurnal Teknisia merupakan jurnal ilmiah berkala yang diterbitkan tiga kali setahun oleh Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia, Daerah Istimewa Yogyakarta yang berisi artikel-artikel bidang teknik sipil, teknik lingkungan, dan arsitektur.
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Articles 137 Documents
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HUBUNGAN KENAIKAN NILAI UPAH MINIMUM REGIONAL (UMR) DENGAN NILAI UPAH PEKERJAAN BORONG DALAM KEGIATAN KONSTRUKSI BANGUNAN GEDUNG Andi Purnomo
TEKNISIA Vol. XXI, No. 1, Mei 2016
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Nowadays, the dynamic progresses of industry often collides with its own labors because of many issues, one of them is the monthly salary. Actually Government has released a rule that regulate the minimum increasing of regional allowance annually,called UMR. The rule also applies to the building construction that is usually paid based on the volume of workload or unit price that increases periodically. Building construction project is usually well planned, including its labor payment. However at the same period, both the government regulation and project planning is being held, and this has raised curiosities in terms of its relevance, therefore the objective of this study is to determine the relevance of the annual increasing of the minimum regional sallary (UMR) with the increasing of the unit price. Then, in the budget project planning (RAB), a designer could use the government regulation of minimum allowances to calculate the increasing of labor cost. Actually, the government released another regulation consist of procedures for calculation of unit price of land for buildings and housing standard (SNI) to calculate the cost by volume of works, but its still need the daily workers payment that’s very varied in every group of workers.The research method was collecting annual regulation released by the government and interviewing with a few foreman about their unit price that was stated on the working contract (SPK). The result of this study indicate that there is no relevance between the increasing of minimum regional sallary of it and the increasing of the unit price. Therefore, designers should make item by item volume cost to create budget project planning perfectly or use government standard to state maximum unit price in each volume of works.
KAJIAN LEBAR RETAK BALOK BETON AKIBAT PENGGUNAAN TULANGAN ALUMINIUM PADUAN Novi Rahmayanti; Iman Satyarno
TEKNISIA Vol. XX, No. 2, November 2015
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

The use of concrete structures in a corrosive environment requires a minimum concrete cover thickness of 50 mm.Tthick concrete cover is certainly very risky occurrence of spalling which result in reduced capacity of the cross section of the structure. For this study utilizes the aluminum alloy material as additional reinforcement bars that fill a third of thick concrete cover, where the aluminum has properties that are resistant to corrosion. The purpose of this study to obtain the contribution of aluminum alloy in the capacity of the concrete beam section and a wide crack that occurs without using reinforcement rebars. This study uses five pieces of beam specimen dimensions of 300 mm x 150 mm and a span length of 1600 mm. The beam using materials mortar, concrete and 13 mm diameters of aluminum alloy that were tested for bending strength. As for each of the aluminum ratio of 0% (B0); 0.34% (B1); 0.68% (B2); 1.02% (B3) and 1.36% (B4). Testing method requiring a single point of loading. The results showed that the load capacity of the test specimen when the first crack in the beam but not significantly increased with increasing amount of aluminum, which is equal to 1 times, 1,002 times, 1.01 times, 1.03 times and 1.07 times the beam ratio aluminum 0%. The maximum load capacity has increased along with increasing the number of aluminum, which is equal to 1 times, 1.64 times, 2.95 times, 4.00 times and 5.17 times its maximum capacity aluminum beam ratio of 0%. Rated maximum bending stress concrete (FCR) are eligible crack width 0.4 mm when conditions permit loading is an aluminum beam with a ratio of 0.68%; 1.02%; 1.36% 3.81 MPa; 3.89 MPa; 4.02 MPa.
PENGARUH INTERAKSI KINEMATIK MASSA BANGUNAN TERHADAP RESPONS NON LINIER INELASTIK LAPISAN TANAH Muhammad Irfan Marasabessy; Widodo Widodo
TEKNISIA Vol. XXII, No. 1, Mei 2017
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Seiring bertambahnya intensitas beban gempa, respons tanah sudah akan memasuki respons inelastik. Mengingat tanah mempunyai hubungan beban-deformasi yang sifatnya non-linier, maka pada beban yang besar respons struktur akan menjadi analisis non-linier inelastik. Salah satu metode yang menggambarkan hubungan regangan-tegangan pada media tanah adalah Hysteretic Ramberg Osgood (1943). Kondisi lapisan tanah akan sangat berbeda antara tanah bebas (free field) dan ketika terdapat bangunan diatasnya (Buidling Mass Effect). Massa bangunan akan berdampak pada bertambahnya kekakuan tanah sehingga secara teori respons dinamik yang dihasilkan akan berbeda. Perbedaan respons seperti ini perlu ditinjau lebih lanjut untuk memberikan informasi seberapa besar pengaruh bangunan terhadap respons dinamik tanah dibawahnya.Evaluasi respons inelastik tanah dipelajari dengan mengambil sudut pandang secara teori dari referensi dan investigasi dua profil tanah yang berbeda di Yogyakarta. Kedua profil tanah tersebut adalah Hotel Mataram City dan Rumah Sakit Akademik UII. Selain data tanah juga diketahui data struktur bangunan sebagai input beban massa bangunan yang akan membebani lapisan tanah dibawahnya. Analisis dilakukan dengan variasi kedalaman tanah endapan dan rekaman gempa (Bucharest, Elcentro, Duzce Turki Elnashai, Manjil, Duzce Turki, dan Loma Prieta) yang menggunakan metode integrasi numerik langsung β-Newmark dan diapliksikan ke Excel MATLAB R210a. Hasil analisis menunjukan bahwa pengaruh respons inelastik akan sangat signifikan pada simpangan, regangan geser dan tegangan geser. Respons simpangan dan regangan akan mengecil ketika tanah dibebani oleh massa bangunan, sebaliknya respons tegangan akan membesar. Respons kecepatan dan Percepatan menunjukan penurunan yang cukup signifikan pada profil tanah 1 untuk setiap gempa. Sedangkan untuk profil tanah 2 nilai responsnya akan mengecil pada frekuensi gempa yang semakin besar. Pengaruh spektrum respons di lapisan permukaan menunjukan periode getar PGA yang mengecil ketika tanah dibebani oleh massa bangunan yang artinya frekuensi gempa akan membesar dari kondisi ketika tanah bebas (free field).
PENGEMBANGAN MODEL UNTUK MEMPREDIKSI BIAYA PEMBANGUNAN RUMAH LAYAK HUNI BERDASARKAN HARGA BAHAN Albani Musyafa
TEKNISIA Vol. XXI, No. 2, November 2016
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Cost estimate is very important for all parties involved in a construction, such as owners, contractors, consultants, investors. A method for calculation of cost estimate is Budget Plan (RAB). However, the calculation requires some competencies and time. The objective of this study is to develop a easier method to calculate the cost estimation, i.e. by developing formulations of RAB based on the price of some materials. This research was carried out on simple house projects, which was built in 2014 in regions of Magelang, Bantul, Sleman and Yogyakarta. The data were collected by observation and interviews in the fields. The interviews were conducted to collect information of material prices and labor costs used as the independent variables. While, the observation aimed to calculate the value of RAB used as the dependent variable. Analysis of data used the correlation and regression techniques. Based on the analysis, the variables with strong correlation with RAB is prices of the brick (0.907), while the correlation between employee wage and RAB is quite low. The regression analysis resulted that the cost of house construction can be predicted by equations: RAB = 66,823 X1 - 1.277.771 or RAB = 53,244 X1+ 26,423 X2 -1.826.152, with X1 is the price of standard brick per hundred pieces expressed in rupiah and X2 is a prices of floor covering material per square meter  stated in rupiah. Based on the validation, the accuracy of the formulations is over 97%. Estimasi biaya memiliki fungsi yang sangat penting dalam dunia konstruksi bagi semua pihak yang terlibat di dalam konstruksi seperti owner dan investor. Salah satu cara membuat estimasi harga tersebut adalah dengan menggunakan Rencana Anggaran Biaya (RAB).   Bagaimanapun, cara perhitungan tersebut memerlukan kompetensi, ketelitian dan membutuhkan waktu yang cukup lama. Penelitian ini bertujuan mencari cara yang lebih mudah dan cepat untuk menghitung estimasi biaya, yaitu dengan mencari formulasi yang bisa digunakan untuk menghitung nilai RAB dengan variabel bebas harga bahan dan upah tenaga kerja. Penelitian ini dilakukan pada proyek-proyek rumah sederhana tipe 45, yang dibangun pada tahun 2014 di komplek perumahan yang ada di Kabupaten Magelang, Kabupaten Bantul, Kabupaten Sleman dan kota Yogyakarta. Pengumpulan data dilakukan dengan cara observasi dan wawancara langsung di lapangan. Wawancara dilakukan untuk mendapatkkan informasi harga bahan dan upah tenaga kerja yang digunakan sebagai variabel bebas. Sedangkan observasi dilakukan untuk menghitung nilai RAB yang digunakan sebagai variabel terikat. Analisis data penelitian menggunakan teknik korelasi dan regresi. Dari hasil analisis korelasi dan regresi, variabel yang memiliki hubungan paling tinggi dengan nilai rencana anggaran biaya bata merah dengan nilai koefisien korelasi 0,907 yang berarti variabel bebas tersebut memiliki korelasi yang sangat kuat terhadap variabel terikat. Sementara itu korelasi upah tenaga kerja dan RAB cukup rendah. Dari hasil analisis regresi untuk semua variabel bebas didapat persamaan yang dapat digunakan untuk menghitung nilai RAB yaitu, RAB = 66,823 X1 - 1.277.771 atau RAB = 53,244 X1+ 26,423 X2 -1.826.152, dengan X1  adalah harga batu bata ukuran 22 x 11 x 5,5 per seratus buah yang dinyatakan dalam rupiah dan X2 adalah harga material penutup lantai per meter persegi yang dinyatakan dalam rupiah. Formulasi tersebut memberikan tingkat akurasi yang cukup baik, yaitu diatas 97 %.
PERILAKU LENTUR PERBAIKAN BALOK BETON BERTULANG DENGAN VARIASI LEBAR CARBON FIBRE REINFORCED POLYMER Atika Ulfah Jamal; Helmy Akbar Bale; Iqbal Haqiqi
TEKNISIA Vol. XX, No. 2, November 2015
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

The retrofitting of reinforced concrete structural elements required in case of material degradation which results in decreased strength, stiffness, stability and resistance to environmental conditions. One material that can be used to retrofit concrete structures is the Carbon Fibre Reinforced Polymer (CFRP). Experimental research must be done toward the influence of CFRP width variations to retrofit reinforced concrete beam flexural capacity after damage. The specimen used for this research is a beam with 15x20x120 cm3 dimension. There were three beams used and divided into two groups, Control Beam (BK) and Carbon Beam (BC). These three beams were given a load until the first crack then had to retrofit with CFRP, and was given a load again upon the beams finally fallout and  the result of maximal load that able to be supported by the beam is obtained.  The research result shows that there is the significant increase in the beam flexural strength. The wider CFRP used for retrofitting, the greater beam flexural capacity increases. CFRP uses as retrofitting material in the beam bending area also able to prevent a new crack in the bending area.
KAJIAN ANALISIS RISIKO BENCANA TANAH LONGSOR DI DESA TERONG KECAMATAN DLINGO KABUPATEN BANTUL Sri Aminatun; Yunalia Muntafi
TEKNISIA Vol. XXI, No. 2, November 2016
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Bantul Regency has 16 landslides-prone villages located on the ridge morphology of the hills in the eastern region and a small part of the western region of Bantul regency. Based on the landslide map from BPBD in 2011, Terong village is one of the villages in Bantul regency which experienced high intensity of landslide, so the risk analysis of landslide in detail is needed as one of the disaster mitigation efforts in that region. This study aims to identify residents who are in the landslide threat zone, both in a high threat zone and medium threat zone. The method used in this research is descriptive method with qualitative approach used to give a clear picture about the number of citizens in each zonation. Sources of data used are primary and secondary data sources through interviews and documentation. The results of the study indicate that 1) the number of household in the high risk red zone is 1 household, in the yellow risk zone is 22 household, and in the green risk zone is 1 household; 2) Terong village has a high threat, medium vulnerability, and high capacity, which is means that it has a medium risk value.
PENGARUH VARIASI LEBAR CFRP PADA BAGIAN TARIK TERHADAP DAKTILITAS BALOK BETON BERTULANG PASKA PERBAIKAN Atika Ulfah Jamal; Novi Rahmayanti; Helmy Akbar Bale; Iqbal Haqiqi
TEKNISIA Vol. XXI, No. 1, Mei 2016
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Retrofitting should be done on reinforced concrete beams were damaged the structure, it is to restore or improve the strength and ductility. One of the innovations of materials that can be used for retrofitting is Carbon Fiber Reinforced Polymer (CFRP). The width of the CFRP used for retrofitting an effect on load and deflection occurs in the beam, it will also affect the ductility of the beam. In this study examined the influence of the width of CFRP for retrofitting to the ductility of reinforced concrete beams with dimensions of 15x20x120 cm3. The beam is loaded until cracking occurred. Retrofitting performed on beams that have been fractured by adding CFRP on the tensile reinforcement of reinforced concrete beams. The wide variationCFRP is used to repair the beam, which is 5 cm, 10 cm, and 15 cm. The results showed that the width of CFRP placed on the tensile reinforcement in reinforced concrete beam elements repair after damage affects the curvature ductility. The wider the CFRP used for the retrofit of reinforced concrete beams lead to the greater percentage decrease in ductility curvature.
IDENTIFIKASI POTENSI PLTMH DI DESA MONGIILO PROVINSI GORONTALO Komang Arya Utama
TEKNISIA Vol. XX, No. 2, November 2015
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Mongiilo is a village that has a very poor service in electricity supply. However, this village has Butaiyo Kiki River that flows throughout the year that can be used to supply additional power to the community. This research aims to determine the potential of PLTMH from Butaiyo Kiki River in order to solve the problems of electric energy in the village Mongiilo. The method used are observation and measurement directly in the field; determine the dependable discharge by using FJ Mock formula; and analysis of intake infrastructure according to the manual book of  the Directorate General of Irrigation Department of Public Works. The result of this research shows that the average dependable discharge of Q90 obtained at 0.60 m3/sec. Based on conditions on the field site, the height of potential head which is 13.23 m which will generate power of 48,798 Watts. The number of homes receiving electrical power supply with a minimum requirement of electricity per home of 450 watts is 108 Houses. As for the design of building power plants is obtained; weir crest height is 2.5 m, intake geometry are 1 m of  width and 0.5 m of height. Headrace is a rectangle with a height of 1.3 m, a width of 1 m, stilling basin with a width of 1.5 m, length 16 m and height of 2.1 m, sand trap with 0.691 m high and 0.5 m wide with a slope 3.6%; forebay is 6 m long, 3 m wide, height is 2.5 m.
PENGARUH CAMPURAN ABU SEKAM PADI TERHADAP KAPASITAS DUKUNG PONDASI DANGKAL PADA TANAH GAMBUT Muhammad Rifqi Abdurrozak
TEKNISIA Vol. XXII, No. 1, Mei 2017
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract:Various methods of soil improvement have been widely developed, one of the improvement are with soil stabilization as an alternative problem-solving to the subsidence of soil and its bearing capacityy. One of the alternatives given to this model is rice husk ash (RHA) as a filler for stabilization of shallow foundations on peat soils. This paper presents changes in soil bearing capacity and the subsidence that occurs with RHA mixed variations. From the research results obtained that Central Kalimantan peat soil has high organic content of 80,15%. The result of triaxial test with Unconsilidated-Undrained (UU) condition on the original soil obtained cohesion value (c) of 0,645 kg/cm2 and the value of φ of 8,6 °, while the addition of RHA levels of 8%, during the period of 3 days with cohession value of 0,3089 kg/cm2 and the value of φ of 29,53 °. The addition of RHA can increase the bearing capacity of the soil to above 100% of the bearing capacity of the original soil. The qult result on the original soil is 750,612 kN/m2, whereas with the addition of RHA, the largest qult value is found at 11% of the seven days duration with the value of 2162,763 kN/m2 and the smallest qult value in the addition of 5% RHA and one day period with a value of 1.010,885 kN/m2.
APLIKASI ORTHOTROPIC STEEL DECK (OSD) DENGAN RIBS PENAMPANG V PADA JEMBATAN RANGKA TIPE CALENDAR HAMILTON (CH) Astriana Hardawati
TEKNISIA Vol. XXI, No. 2, November 2016
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Jembatan rangka baja tipe Calendar Hamilton (CH) dengan pelat lantai beton mempunyai berat sendiri lantai yang cukup dominan daripada lantai dengan struktur baja. Pada penelitian ini diaplikasikan sistem Orthotropic Steel Deck (OSD) sebagai pengganti lantai beton untuk perbaikan jembatan. Sebagai studi kasus adalah jembatan CH dengan bentang 104 m di Keduwang, Imogiri. Tujuan penelitian ini adalah melakukan desain OSD dengan ribs penampang V dengan mempertimbangkan kekuatan fatigue dan menghitung nilai Rating Factor (RF) rangka utama sebelum dan sesudah redecking untuk mendapatkan nilai kapasitas sisa jembatan. Metode yang digunakan yaitu memodelkan pelat OSD dengan menggunakan software ABAQUS untuk mendapatkan dimensi ribs dan pelat yang optimal dari segi berat, dengan batasan strength stress fatigue limit sesuai AASHTO. Selanjutnya, pemodelan jembatan secara keseluruhan dilakukan dengan menggunakan software SAP2000 untuk mengetahui gaya-gaya dalam pada jembatan dan menghitung rating factor (RF). Dari hasil pemodelan ABAQUS didapat 10 variasi pelat OSD yang optimal untuk 3 variasi LHR yaitu 1000, 2000, dan 3000 dan 5 variasi umur rencana yaitu 10 tahun, 20 tahun, 30 tahun, 40 tahun, dan 50 tahun. Dari hasil pemodelan SAP2000 dan analisis diketahui bahwa jembatan dengan pelat OSD memiliki nilai rating factor lebih besar daripada jembatan dengan pelat beton. Nilai rating factor terkecil didapat dari elemen stringer untuk semua variasi jembatan dan nilainya dibawah 1,0.

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