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Jurnal Rekayasa
Published by Universitas Lampung
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Articles 8 Documents
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Search results for , issue "Vol 18, No 1 (2014): Edisi April 2014" : 8 Documents clear
ANALISIS KEKUATAN GIRDER AKIBAT KEMIRINGAN MEMANJANG JEMBATAN Suyadi Suyadi
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 1 (2014): Edisi April 2014
Publisher : UNIVERSITAS LAMPUNG

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At standards, the maximum slope of the bridge is 5%. Longitudinal slope of the bridge will determine the length of the bridge, more sloping more length. Its became more greater the cost. The reasons that underlie this analysis. The analysis has been performed on three kinds of bridges that T beam bridge, PCI bridge and bridge steel truss girder models Callendar Hamilton. The analysis was performed in the manual method and software SAP 2000. This Analysis focused on the capacity of the cross-sectional of the withstand stresses caused by the load acting on the bridge. The bridge is modeled in some slope ranging from 0% for the comparison, 2.5%; 5%; 7.5% and 10%. To easy analysis, load to be projected in the two direction at sloping bridges. It is seen that more greater of the slope cause axial force on girder bridges is increasing. The analysis considering of the combination of axial load, shear and bending ascpects From the analysis looks at three kinds of bridges, with a slope of up to 10% were still able to support the load of the bridge there. It is necessary to do advance analysis of the bridge’s ability and the other element of bridges that direct contact with the longitudinal girder bridge girders due
PEMODELAN STOKASTIK CURAH HUJAN DARI BEBERAPA STASIUN CURAH HUJAN WILAYAH TANGGAMUS Ahmad Zakaria; Geleng Perangin Angin; Qodri Ismail
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 1 (2014): Edisi April 2014
Publisher : UNIVERSITAS LAMPUNG

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This research is to study the periodic and stochastic models in the series of daily rainfall data. The study was conducted using daily rainfall data with a data length of 25 years (1977-2001) from the station of Banjar Agung, Gisting and Gunung Batu. This research used secondary rainfall data from Tanggamus, This study change the series of daily rainfall data into the sepektrum rainfall using FFT (Fast Fourier Transform). Periodicity of daily rainfall data were presented by using 512 rainfall. Stochastic series of rainfall data are assumed as the difference (error) between the rainfall data with periodic rainfall model. Results of this study is the correlation coefficient from three rainfall stations In this study, the correlation coefficient (R) between the data and the periodic model is 0,9974, between stochastic data series and stochastic models is 0,9996, and between data and periodic stochastic models is 0,99997. From these results it can be concluded that the periodic stochastic models of rainfall from Tanggamus periodic models using 512 rainfall data, the approach provides a very significant.
Sampul Muka Jurnal Rekayasa Edisi April 2014 Zakaria, Ahmad
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 1 (2014): Edisi April 2014
Publisher : UNIVERSITAS LAMPUNG

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Sampul Muka Jurnal Rekayasa Edisi April 2014
PEMODELAN PERIODIK DAN STOKASTIK CURAH HUJAN KOTA BANDAR LAMPUNG Ahmad Zakaria; Kartini Susilowati; Rasimin Rasimin
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 1 (2014): Edisi April 2014
Publisher : UNIVERSITAS LAMPUNG

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This research aims to study the periodic and stochastic modeling of daily precipitation data series. The study was carried out using data of daily rainfall data with a length of 13 years (1987 – 2000) from Pahoman, Sumur Putri, and Sumber Rejo rainfall stations. The rainfall series used is as- sumed to be free from the influence of the trend. This research use how to convert data into time series sepektrum rain precipitation using program FFT (Fast Fourier Transform). Periodicity of daily rainfall data is presented using a periodic component 512. Stochastic rainfall series of rain- fall data is assumed as the difference (error) between the rainfall data with periodic rainfall model using 512 components. Based on the data series on stochastic stochastic component, calculated using the approach of the autoregressive model. Stochastic models presented by using a autore- gressive model of order two. The results of this research is the value of the correlation coefficient of the average precipitation three stations. For this study, the average correlation coefficient (R) between data and model of 0,9719 is periodic, between data and stochastic model is 0,9974, and between the data and the model with stochastic is 0,9974. From these results it can be concluded that periodic stochastic model of the rainfall of the Bandar Lampung City that processing model using 512-series compo- nents, presented a very significant approach.
Daftar Isi Jurnal Rekayasa Edisi 2014 Ahmad Zakaria
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 1 (2014): Edisi April 2014
Publisher : UNIVERSITAS LAMPUNG

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Daftar Isi Jurnal Rekayasa Edisi 2014
LUBANG RESAPAN BIOPORI SEBUAH STRATEGI UNTUK MEMANFAATKAN AIR HUJAN DALAM MENJAGA KELESTARIAN SUMBER AIR DI KOTA BANDAR LAMPUNG Purwadi, Ofik Taufik; Yulianto, Herza; Mashabi, Mashabi
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 1 (2014): Edisi April 2014
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The basic principles of water conservation is to prevent the water lost as surface streams and save them as fully as possible into the body of the Earth. A form of utilization of rain water can be done by way of accommodating direct rainwater that falls on the surface of the Earth or water infiltrate into the ground. The first way is the direct way to reuse the rainwater that falls onto the surface of the ground by creating a pond or tub of rainwater collectors. Ways of utilization of rain water with water infiltrate into the soil can be done by make: infiltration well; and/or the infiltration hole biopori. Infiltration Hole Biopori is one technology that has been developed by Brata, these technologies effectively to reduce the potential for flooding and increase soil water reserves through utilization of rain water. Method of making Hole Resapan Biopori it has been widely de- veloped in some area (Jakarta, Jogjakarta etc.), because the technology is so cheap, easy and effi - cient. In the city of Bandar Lampung, the utilization of rain water has not done much, only a few establishments that have been doing this activity. The Agency has articulated the rainwater uti- lization progam was TAPS and AGENCY. At the community level city Bandar Lampung, the use of biopori still sound familiar so that the required infiltration hole making biopori socialization. Making the biopori infiltration hole, it can provide convenience for people living in crowded envi - ronments with land/environment is limited given the size of the biopori infiltration small hole with a diameter of 10 cm and a depth of 100 cm. Making the biopori infiltration hole it can provide in- put infiltration rain water into the ground to become groundwater. In order to perform groundwa - ter conservation through utilization of rain water by making biopori infiltration hole.
ANALISIS PERBANDINGAN PARAMETER TRANSFORMASI ANTAR ITRF HASIL HITUNGAN KUADRAT TERKECIL MODEL HELMERT 14-PARAMETER DENGAN PARAMETER STANDAR IERS Romi Fadly; Citra Dewi
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 1 (2014): Edisi April 2014
Publisher : UNIVERSITAS LAMPUNG

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This research aims to compare the 14 transformation parameters between ITRF from computation result using the Helmert 14-parameter models with IERS standard parameters. The transforma- tion parameters are calculated from the coordinates and velocities of ITRF05 to ITRF00 epoch 2000.00, and from ITRF08 to ITRF05 epoch 2005.00 for respectively transformation models. The transformation parameters are compared to the IERS standard parameters, then tested the signifi- cance of the differences. The transformation parameters are used to reversly transform to obtain the common points coordinates ITRF00 and ITRF05 system. The value of 14-parameters are also used to transform the check points coordinates on the ITRF00 and ITRF05 coordinate system. The results show that the RMSe difference of the coordinates of the reverse transformation result with Helmert model using computed transformation parameters and the IERS standar parameters are 0.1 mm (for ITRF00) and 0.8 mm (for ITRF05). The results of significance test of 14 parameters to IERS standard parameters are only scale factor (ds) on the transformation from ITRF05 to ITRF00 statistically significant difference. However RMSE values of the coordinate transforma- tion of the check points (Helmert model) using calculated and IERS standar parameters are not difference. It can be concluded that the results of the transformation parameter of 14-parameter Helmert model with the least squares computation is not much different with IERS standard pa- rameters
Cover Belakang Jurnal Rekayasa Edisi April 2014 Ahmad Zakaria
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 1 (2014): Edisi April 2014
Publisher : UNIVERSITAS LAMPUNG

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Cover Belakang Jurnal Rekayasa Edisi April 2014

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