Jurnal Rekayasa
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Cover Belakang Jurnal Rekayasa Edisi April 2014
No full textCover Belakang Jurnal Rekayasa Edisi April 201
PEMODELAN CURAH HUJAN KUMULATIF MINGGUAN DARI DATA CURAH HUJAN STASIUN PURAJAYA
Full text linkThe goal of this research is to study the periodic and stochastic models of data series of the weeklycumulative rainfall. The study was done by using daily rainfall series with long data 25 years(1977-2001) of Purajaya station. Based on the daily rainfall series, a weekly cumulative rainfallseries was calculated. The series of rainfall is assumed to be free of trend. Periodicities ofperiodic rainfall model of the weekly rainfall data series were presented by using 509 periodiccomponents. Stochastic components of the weekly rainfall data are assumed as residues betweenthe rainfall data with the periodic rainfall model. The stochastic components were calculatedusing the approach of autoregressive model. Stochastic Model presented in this research is usingthe thirth order autoregressive model. Validation between rainfall data and the periodic-stochastic rainfall model is done by calculating the correlation coefficient. For this study, thecorrelation coefficient between the data and the model of the weekly cumulative rainfall is 0,9999.From the results of this study can be inferred that the model of the weekly rainfall from Purajayastation gives very highly accurate approach
Pengaruh Waktu Pengerasan pada Kekuatan Paving Block yang Menggunakan Clay, Semen, dan Pasir.
Full text linkSoil samples were tested in this study are derived from Karang Anyar, South Lampung. Variationsin content of the mixture used were 6%, 8%, and 10% cement and 5% sand on every variation ofcement from 7 days, 14 days, and 28 days curing time as well as the burning treatment and no-burn combustion paving block samples. Based on the results of physical testing native soil, USCSsoil samples classify as fine-grained soil and included in the CL group.The results of this study is paving block that using clay, cement, and sand does not meet ISOpaving block. However, the addition of additives and curing can increase the physical and me-chanical properties of the soil. This is proved by the increasing value of the optimum moisturecontent and density of the mixture. For the compressive strength of paving blocks without and withburning process are best shown in the addition of a mixture of 10% with 28 days curing tim
DAMPAK BANJIR WAY KEMILING DAN WAY PEMANGGILAN TERHADAP SOSIAL DAN EKONOMI MASYARAKAT
Full text linkFlooding is a natural occurrence that needs to be learned/character of its characteristics so as notto harm the community that exists around the River as well as the social and economic impact, es-pecially in communities around the River Way Kemiling and the Way Pemanggilan. The researchaimed to find out how large the impact of floods in terms of technical, as well as the social andeconomic society along the Way Kemiling and Way Pemanggilan who never had flooded. Re-search conducted since July to September 2012, with methods of field survey and fill out the ques-tionnaire directly to residents affected by flooding. Then conducted the calculation of flood dis-charge (Q) one-year anniversary of when the plans and capacity of the river channel. From theresults of the calculations predicted losses due to floods residents were more or less on averagefor each home is 5,82 million rupiah (this number is based on the origin's home around the site offlooding), this does not include the House's other residents. Debit calculation results shows thatexisting channels that exist have 12,52 capacity m 3/second, while the estimated discharge wouldhappen (annual discharge) reached 19,06 m3/second. So the existing channels will not be able tohold the excess water, let alone five annual floods
Sampul Muka Jurnal Rekayasa Edisi Desember 2013
No full textSampul Muka Jurnal Rekayasa Edisi Desember 201
Kinerja Operasi Bus Eksekutif dan Travel Rute Bandar Lampung - Bandung.
Full text linkThis study was conducted in order to know service level of excutive bus and travel car and also tofind user transport characteristic in choosing modes of transportation and get a modal choice ofmode which explain probability of user transport in mode choice executive bus and travel carroute Bandar Lampung – Bandung. In this study the method uses is ducle linear regression analy-sis to look for utility of executive bus and travel car be based on movement plan of work/officialaffair, social visit, school/lecture, and recreation. From this value of utility we can calculateprobability of mode choice executive bus and travel car.Research product indicate that the highest probability value of mode choice be based on move-ment plan of work/official affair with Damri executive bus is 41%, movement plan of social visitwith Damri executive bus is 46%, movement plan of school/lecture with Kramat Djati executivebus is 59% and than movement plan of recreation with Damri executive bus is 61%
KAJIAN MODEL PERBAIKAN KERUSAKAN PERKERASAN KAKU (RIGID PAVEMENT)DI PROVINSI LAMPUNG (Studi Kasus Ruas Jalan Sp. Pematang – Sp. Bujung Tenuk)
No full textA case study to Sp. Pematang – Sp. Bujung Tenuk state road (002 ; The Regulation of Minister ofPublic Works No. 631/KPTS/M/2009 on December 31 st, 2001 about the status and function ofState Road/ Non-Toll Road) included to Arterial Road of Eastern (Trans Asean Highway plan).The increasing of LHR volume and traffic weight has caused severe damages in certain parts.Those damages had been repaired by rigid pavement, by using concrete K-350 with 25 centime-ters thickness, 3.50 M x 5.00 M segmentation. After 4 years, the concrete pavement broke, thedamages are cracks on the edges, strips/lengthways, splits, vanish and perforated. Based on themodel of rigid pavement structure, figured out that the tendency of need of additional reinforce-ment on the edge of the plate, so the weight will not only be borne by concrete plate and dowerbars. The position of vehicle wheels were in the center or plate (Model 2), which affect negativelyto concrete plate with maximal moment as 7715.53 kgr.m and so additional reinforcement (plaitreinforcement) of D12-125 mm was needed. The better quality of concrete, the smaller deflectionwill be. By using fy = 400 MPA, but a conversion could be done for lower quality concrete case inorder to get proper reinforcement’s wide. That’s why the repair advice concentrate to not only onone segment of concrete plate, but also only on damages by giving additional reinforcement (wiremesh) D12 -200 mm (Model 2). To reach the increasing point of concrete tensile stress, the addi-tional reinforcement (wire mash) is needed, depending on damages repair
Kinerja Kereta Api Diesel AC Way Umpu Jurusan Tanjung Karang – Kotabumi dan Kharakteristik Penumpang.
Full text linkRailways as a mode of transportation has special characteristics and advantages.Operating ofKRD AC Way Umpu aims to provide good service and convenient for people of Lampng who wantto go to Kotabumi or to Bandar Lampung.In this study describes the characteristics of KRD passengers based on age, job, income, trip pur-pose, the intensity of the journey, the destination station, level of service, fare and load factor.The results showed overall performance of KRD is quite good.Based on the characteristics of thedata analysis, 62.33% of passengers aged adults (21-40 years old).In terms of jobs, dominated bystudent / college students 34%, 23.33% self-employed, civil servants / military / police22.67%.Rp.1.000.000 is the highest income level, - at 36.67%. Mean 31% of school trips and so-cial visits 47.67%.The intensity of the 1 times a week is49% with the highest purpose the last sta-tion Tanjung Karang96.35% and Kotabumi.Flat fee which resulted in a lack of purchasing powerof travelers in stations along the road to Tanjung Karang or KotabumiSo the impact on the de-cline in load factor at some stations.For the average passenger on a normal day is still appropri-ate capacity provided
Sampul Muka Jurnal Rekayasa Edisi Desember 2012
No full textSampul Muka Jurnal Rekayasa Edisi Desember 201