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Pradipta Nandi Wardhana
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teknisia@uii.ac.id
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teknisia@uii.ac.id
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Daerah istimewa yogyakarta
INDONESIA
Teknisia
ISSN : 08538557     EISSN : 27460185     DOI : 10.20885/teknisia
Core Subject : 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
ANALISIS KESTABILAN CABLE STAYED BRIDGE AKIBAT PENGARUH RASIO LEBAR TERHADAP BENTANG JEMBATAN Sumaiyah Ohorella; Harsoyo Harsoyo
TEKNISIA Vol. XXII, No. 2, November 2017
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Cable stayed is one of the long spans bridge structure that can minimize the use of pillars so that access under the bridge can be utilized optimally. The main structure of the cable stayed bridge is a cable connected from the bridge deck to the pylon. Problems in long spans bridge structure is wind can provide significant changes in the structure of the bridge. Based on previous experience and research, shows that the influence of wind can cause security and service problems. It can even cause instability in the entire bridge structure due to the flexible nature of its structure. This study aims to analyze the stability of the cable stayed bridge due to the influence of the span ratio to the width of the bridge. The width of the bridge is varied from 14 m to 24 m every 1 m addition modeled using the SAP2000 v.14 program. The object of research using Jembatan Merah Putih, Ambon. The structural response is observed as the natural vibration frequency, internal force and deformation of the structure. The larger the ratio of bridge width to the main span of the bridge, the greater the weight itself and the load of the service work on the bridge structure. So the values of the inner forces that are generated on the main structure include the tower and the bridge deck will be greater for each additional width of the bridge. For the bridge width ratio to bridge span of 0.093 to 0.133, the width of the bridge 14 m to 22 m remains stable against the aerodynamic effect due to wind according to Leondhart, B ≥ L / 30 and still qualifies the maximum deflection according to AASHTO (dmax= 𝐿𝑡𝑜𝑡𝑎𝑙/800) and AISC (dmaks= 𝐿/150).
SIMULASI ALIRAN BANJIR LAHAR PASCA ERUPSI GUNUNG MERAPI 2010 TERHADAP KEBERADAAN SABO DAM DI SUNGAI GENDOL Muchamad Abdul Kholiq
TEKNISIA Vol. XXII, No. 2, November 2017
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Eruption of Mount Merapi in 2010 was the biggest eruption since 1872. On eruption in 2010, the mountain spewed out 140 million cubic meters of lava. While the direction of the lahar slide is mostly south. Therefore, several rivers south of Mount Merapi experience lava buildup which can become lava floods if exposed to heavy rain, one of which occurs on the Gendol River. Qualitative methods are used in this thesis. Qualitative data are obtained through a variety of data collection techniques, namely analysis of simulations, documents, and observations. This study took place around the banks of Sungai Gendol. This phenomenon of lava flood often causes many losses both materially and non-materially. There are various ways to mitigate lava floods, one of which is to simulate lava floods by using numerical modeling to estimate the movement of lava flood flows and their coverage area. In this research, the simulation of lava flood uses numerical modeling using the Dimlar V.1.0.2011 application. This Simlar application produces a simulation of the flow of base lava flood geographic information system that can be processed to retrieve data on the direction of lava flood propagation, the volume of lava flood flow and the area of lava flood coverage. And also can be given the existence of SABO building, so that it can compare the time taken by the flood to glide on the river given the SABO building or not given the SABO building.
KAJIAN ANALISIS RISIKO BENCANA TANAH LONGSOR SEBAGAI DASAR DALAM PEMBANGUNAN INFRASTRUKTUR DI DESA SRIHARJO KECAMATAN IMOGIRI KABUPATEN BANTUL Sri Aminatun
TEKNISIA Vol. XXII, No. 2, November 2017
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Sriharjo Village Imogiri District Bantul Regency is one of the villages that are vulnerable to landslides located on the morphology of the ridge to the hills in the eastern region of Bantul Regency. In each rainy season some areas in the village of Sriharjo landslides occurred. Basedon the map of landslide incident from the Regional Disaster Management Agency in 2011, Sriharjo village is one of the villages in Bantul Regency that experienced high intensity of landslide events, one of the ways to mitigate the landslide disaster is to assess and analyze the risk of landslide disaster in detail. This study aims to identify the homes of residents who are in landslide threat zone, be it a high threat zone or medium threat zone. The method used in this research is descriptive method with qualitative approach combined with quantitative method used to give a clear picture about the number of houses in each zonation. Sources of data used are primary and secondary data sources through interviews and documentation. The results of this study indicate that 1) the number of households in the high risk zone is 119 houses, in the yellow risk zone is 136 houses. 2) The village of Sriharjo has a high threat, medium to high vulnerability, and medium capacity, which means having a medium to high risk. 3) Recommended infrastructure development for disaster mitigation.
KINERJA SEISMIK STRUKTUR PADA TIPE GEDUNG DENGAN KETIDAKTERATURAN KETINGGIAN DAN DENAH Eka Faisal Nurhidayatullah; Mochamad Teguh
TEKNISIA Vol. XXIII, No. 1, Mei 2018
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Makalah ini membahas kinerja seismic struktur pada bangunan gedung, yang memiliki vertical and horizontal irregularrities ditunjukkan dengan elevasi bangunan A lebih tinggi dan lebih panjang dari pada bangunan. Bangunan tersebut mempunyai beberapa keunikan desain, antara lain memiliki dua massa gedung (blok A dan B) yang dibangun di atas tanah berkontur. Untuk menyatukan dua massa bangunan tersebut dihubungkan oleh struktur tangga dengan elevasi yang berbeda. Massa bangunan A terdapat dilatasi terbatas atau tidak menerus. Pemeriksaan kinerja seismik dilakukan guna menentukan implikasi yang ditimbulkan dari keunikan desain bangunan tersebut ketika dilanda gempa dan bagaimana solusi atau metode yang tepat untuk mengatasinya.Pemerikasaan kinerja seismik dilakukan dalam tiga tahapan berdasarkan FEMA 310 (1998), yaitu evaluasi tahap 1 (screening) dengan Rapid Visual Screening (RVS) sesuai FEMA 154 (2002), evaluasi tahap 2 (analisis linier) menggunakan analasis beban gempa statik ekuivalen dan analisis dinamik respon spektrum untuk menentukan nilai Demand Capacity Ratio (DCR), dan evaluasi tahap 3 (analisis nonlinier) menggunakan analisis pushover dengan program SAP2000 v.14. Titik kinerja (performance point) ditentukan dengan Metode Spektrum Kapasitas berdasarkan ATC-40 (1996). Level kinerja struktur gedung ditentukan berdasarkan kriteria drift ratio yang disyaratkan oleh ATC-40 (1996). Kondisi sendi plastis struktur gedung ditentukan dengan FEMA 356 (2000).Dari hasil penelitian tahap 1 didapatkan hasil RVS menurut FEMA 154 (2002)adalah not good atau terdapat bagian struktur dan non struktur yang tidak memenuhi persyaratan . Nilai DCR pada analisis tahap 2 untuk beberapa elemen balok sudah lebih dari 2 atau sudah dalam kondisi nonlinear in-elastik, sehingga diperlukan evaluasi lebih detail pada evaluasi tahap 3. Pada evaluasi tahap 3, diperoleh level kinerja struktur gedung damage control.
ESTIMASI KINERJA RUAS JALAN DENGAN PENGATURAN LALU LINTAS SATU ARAH PADA KAWASAN JETIS, YOGYAKARTA prima romadhona
TEKNISIA Vol. XXIII, No. 1, Mei 2018
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

One-way traffic management can be used as a solution in handling traffic problems in order to improve traffic performance. One location with traffic problems is Jetis area which has several roads with trade and commerce activities in the city of Yogyakarta. Therefore, traffic congestion and side barriers disrupt the flow of traffic on the road in Jetis Area. The purpose of this study was to estimate the performance of roads in Jetis Area if one-way traffic management is applied hence the impact. The data were obtained from the Yogyakarta Transportation Agency 2014 then analyzed and modeled with VISSIM software. As the results, before the one-way management implementation, the road with the highest v/c ratio occurred at Jalan Magelang (0.85) and the worst speed of vehicle occurred at Jalan Mangkubumi Selatan as much as 10.43 km/hour. However, with the implementation of one-way traffic management from South to North, V/C ratio increased 8% on Jalan Magelang and Mangkubumi, though 2 other segments decreased 8%. In addition, vehicle speed increased 9% in almost all roads except Jalan Wolter Mangunsidi decreased 2%.
ANALISIS SISA MATERIAL PEKERJAAN STRUKTUR PADA PROYEK KONSTRUKSI rizky sudiro; Albani Musyafa
TEKNISIA Vol. XXIII, No. 1, Mei 2018
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Pada pelaksanaan suatu proyek konstruksi, tidak akan dapat dihindari munculnya sisa material konstruksi. Oleh karena itu, dibutuhkan mekanisme pengelolaan, teknologi, sistem penilaian dan pengelolaan limbah yang komprehensif dan terpadu. Penelitian ini bertujuan untuk mengetahui sisa material konstruksi yang memiliki banyaknya sisa pada pekerjaan struktur, faktor-faktor penyebab sisa material serta solusi efektif dalam mengatasi sisa material konstruksi yang terjadi.Penelitian ini dilakukan pada proyek pembangunan di beberapa gedung tingkat tinggi. Data penelitian diperoleh dengan survei menggunakan kuisioner. Narasumbernya adalah orang-orang yang berhubungan dengan penggunaan material pada pekerjaan struktur seperti pelaksana, cost control engineer, logistik serta gudang. Data diolah dengan analisis perbandingan dan keselarasan data dengan uji konkordansi kendall, serta penjelasan korelasi antara persentase sisa material pekerjaan struktur dan tindakan pencegahannya dengan uji spearman.Hasil penelitian ini menunjukkan bahwa Triplek memiliki kuantitas sisa material yang terbesar pada pekerjaan struktur, karena triplek merupakan material pada pekerjaan bekisting, kejadian penyebab terjadinya sisa material pekerjaan struktur yang paling tinggi adalah perubahan desain, tindakan pencegahan dalam mengatasi sisa material pekerjaan struktur yang terjadi yaitu melakukan monitoring pekerjaan.
ANALISIS VARIABILITAS SPASIAL DAN TEMPORAL CURAH HUJAN DI WILAYAH GUNUNG MERAPI Dewi Ayu Sofia; Joko Sujono; Djoko Legono
TEKNISIA Vol. XXIII, No. 1, Mei 2018
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Rainfall intensity is one of the main trigger factors of cold lava flow on the active volcano slope, such as Mount Merapi. In the event of cold lava flood, where the rainfall as the trigger, there is a process of transformation of rainfall into the flow. Therefore, it is necessary to analyze the characteristics of rainfall, such as variability in terms of space (spatial) and time (temporal). This is important because of Indonesia is passed by the equator, so the rainfall variability is very high. This paper will analyze the spatial and temporal variability of rainfall in the area of Mount Merapi. Rainfall spatial variability was mapped based on the results of interpolation of the maximum rainfall data by Inverse Distance Weight (IDW) method, while the temporal variability was analyzed based on the average rainfall data distribution or maximum annual rainfall of each duration by unisolated event method. The results showed that the average rainfall or maximum rainfall for duration of 1 hour - 8 hours mostly occurred in the daylight until afternoon, between the hours of 13:00 to 17:00 with the incidence of heavy rain occurred in a short duration that is on the duration of 1 hour, 2 hours , 3 hours and 4 hours. Spatial mapping results show similar pattern of distribution where the maximum rainfall position is located in the west side of Mount Merapi.
STUDI GERUSAN DI HILIR BENDUNG KOLAM OLAK TIPE VLUGHTER DENGAN PERLINDUNGAN GROUNDSILL Adi Daning Pangestu; Sri Amini Yuni Astuti
TEKNISIA Vol. XXIII, No. 1, Mei 2018
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

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Abstract

Weir is a river building designed to meet the needs of irrigation. River containment will result in considerable elevation differences between upstream and downstream weirs and result in hydraulic jumps. Hydraulic jumps that occur downstream of the weir will cause scouring downstream of the dam to damage the stability of the weir. So that in the planning of weir there is energy damper of stilling basin. Given the complexity and importance of the problems occurring downstream, the study of scouring downstream from weirs due to the influence of flow to river discharge needs to be given special attention, so that later it can be seen the scouring pattern and the scour depth that occurs. A study on scouring downstream of weirs was conducted in a laboratory with a weir model using a stilling basin vlughter type pond that flowed with three variations of discharge, testing each variation of the flow for 60 minutes. Then tested by giving  protection at downstream weir using groundsill with distance Lmax and ½ Lmax. The experimental results show the greater the flow discharge the greater the scour depth and the flow characteristic values such as the Froude and Reynold numbers. The sediment transport balance was obtained during observation of scour depth at 50 minutes. With the protection of groundsill provide reduction of scour depth by 13.1579% at the groundsill of Lmax distance and 9.2105% at groundill distance of  ½ Lmax.
KUAT LENTUR PANEL DINDING BETON BUSA DENGAN LAPIS GRC DAN WIREMESH Lilis Tiyani; Iman Satyarno; Ashar Saputra
TEKNISIA Vol. XXIV, No. 2, November 2019
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol24.iss2.art2

Abstract

Lightweight concrete is high in demand as it offers lighter specific gravity which makes the load on the structure smaller. In this research, lightweight concrete was produced by mixing water, cement, sand and foam. Besides aiming to obtain lighter specific gravity, the target of this research was also to design lightweight foam concrete with compressive strength equal to the one of commonly used materials for walls of around 3-5 MPa. However, foam concrete has relatively weaker tensile strength, that it would be inadequate when it has to hold the vertical force of the wall when it is applied as wall panels. This research was conducted to examine the flexural strength of the use of GRC coating and wiremesh for wall panels. Cylinder test was performed using tools with a size of 150 mm in diameter x 300 mm in length to analyze the modulus of elasticity at 28 days old, and three cubical test tools for each variance with a size of 50 mm x 50 mm x 50 were employed to test the tensile strength at 28 days old. A number of wall panel specimens with a thickness of 50 mm, width of 400 mm and length of 800 mm were used to measure the flexural strength. The tests performed in this research resulted in modulus of elasticity of 6856,6 MPa, tensile strength of 0,7 MPa. The flexural strength of wall panels without GRC outer layer and without wiremesh reinforcement was found at 1,5 MPa. Meanwhile, the flexural strength of the wall panel with GRC outer layer without wiremesh reinforcement was found at 4,6 MPa. Finally, the wall panel applied with GRC outer layer and wiremesh reinforcement showed a flexural strength 5,3 MPa.
Analisis Alternatif Pemilihan Biaya Siklus Hidup pada Masa Pemeliharaan Ruas Jalan Janti – Prambanan Km 7+759-8+750 Rayendra Rayendra
TEKNISIA Vol. XXIV, No. 1, Mei 2019
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol24.iss1.art3

Abstract

The highway is one of the land transportation infrastructure that serves to connect one area to another for public activities such as economics and social activities. Safe, comfortable, and efficient roads are not avoided by the availability of a flat road and no significant road damage.This research to calculate the life cycle cost analysis of the road with the calculation of pavement thickness that has been done by Ramadhani (2017). The method used in this research is by study case method, by collecting data about Janti-Prambanan Road section KM 7 + 750-8 + 750 and analyzing life cycle cost by estimating road maintenance that will be done during the life of the plan.Based on the analysis that has been done, the cost of construction or initial cost that must be issued based on the thickness of pavement set by Ramadhani (2017) with the total thickness of paved layer 50 cm is Rp. 14,089,007,000. The cost of maintenance at Alternative1 is Rp. 2.565.778.485,91 and at Alternative2 is Rp. 2,555,861,411.86. The total cost of the road life cycle in Alternative 1 is Rp. 16.654.785.485,91 while at Alternative 2 of Rp. 16,644,868,411.86. Analysis of the lifecycle cost of the two alternatives found EUAC for Alternative 1 is Rp. 65,649.89, while for Alternative 2 is Rp. 65,610.80. So that can be said by advancing the rehabilitation at least save on maintenance costs.

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