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INDONESIA
Jurnal Ilmiah Teknik Sipil
Published by Universitas Udayana
ISSN : 14111292     EISSN : 25415484     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Jurnal Ilmiah Teknik Sipil (p-ISSN: 1411-1292; e-ISSN: 2541-5484) is an online periodical journal of science that is published twice a year, in January and July by Civil Engineering Department, Faculty of Engineering, Udayana University. Jurnal Ilmiah Teknik Sipil is a media to publish the results of scientific research students, academics, practitioners and observers in the field of civil engineering including structure, construction management, water resource management, transportation, geotechnical and environmental engineering.
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Articles 10 Documents
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Search results for , issue "Vol. 13, No. 2 Juli 2009" : 10 Documents clear
KELAKUAN TANAH DENGAN SIFAT KEMBANG-SUSUT YANG TINGGI PADA STABILISASI TANAH DENGAN BAHAN SERBUK MARMER DAN BAHAN STABILIA I Gusti Ngurah Wardana
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Soil stabilization by adding limestone as admixture, was one of the mostpopular methods of chemical stabilization in Indonesia. However, with thedevelopment of soil stabilization method, stabilization using limestone has startedto become unfeasible due to the increase of limestone price. Cheaper methods ofchemical stabilization should be sought after. This alternative is apparent in theuse of powdered marble, a waste from marble product processing factories whichis relatively very cheap, and a new product called Stabilia as the only made-in Indonesia product of chemical stabilizer for soil with a price less than a third ofthat of the similar imported products.Research on the effectiveness of both powdered marble and Stabila as soilstabilizers is very limited. Therefore, in this study both of materials were tested onclay soil from Pejaten, Tabanan, in order to identify the changes of soil plasticity,the increase of the soil strength, the changes of soil swelling when the soil wassubmerged under water, the thickness of soil layer affected by water as a functionof the submersion time, the effect of soil initial water content when beingcompacted toward its swelling and its compressive strength, and the optimummaterial. The specimens were made by adding powdered marble that ranges from3% to 12% and the Stabilia content ranges form 0,3% to 3,0% of the total soilweight.From the test it was obtained that both materials caused reduction of soil swellingand increase of soil strength. In general, admixture with Stabilia presented betterresults in terms of free swelling and compressive strength of the samples.Apparently, Stabilia gave the performance almost similar to limestonestabilization. This study also gives a recommendation on the thickness of the soillayer to be stabilized and the optimum admixture content. It is also suggested thatevaluation of the performance of stabilizing agent should not be based on thechanges of soil plasticity alone, but it has to be determined according to theamount of allowable swelling, so that after the soil expands it is still able tosupport the load of foundation or vehicle tires. The influence of water submersionon the surface of the soil sample is merely felt at the relatively thin layer on the topof the sample.
PERKUATAN GESER BALOK BETON BERTULANG MENGGUNAKAN GLASS FIBER REINFORCED POLYMER (GFRP) Putu Deskarta
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

In order to know the effect of GFRP plates on increasing capacity ofreinforced concrete beams, an experiment on reinforced concrete beamsstrengthened by GFRP plates is made. This experiment is focused on finding theeffects of bounding GFRP plates to the side surfaces of the beams on increasingcapacity of the beams.In this experiment the effect of adding GFRP plates having fiber directions of00/900, ±450 and 00 to the increasing shear capacity of reinforced concrete sectionwas studied. The beams had section dimension of 100 cm by 150 cm and length950 cm. The GFRP plates were added on the two side surfaces of the beams bycovering the surfaces with epoxy resin and then add glass fiber in the form ofwoven roving in the direction needed and finally cover again with the epoxy. Thebeams were simply supported and subjected to four points load. Data recordedwere the load-deflection at every step of loading until failure and modes of failureof the beams. The result shows that the beams without GFRP fail in shear failure mode and thebeams with GFRP fail in flexural failure mode. More over, addition of GFRP to thebeams increases the load capacity of the beams by 12.48% averagely. The fiberdirection gives a slight difference to the increasing capacity and the amount of theincreasing capacity given by the fiber direction of 0o/90o, 0o, and ±45o are 13.744%,11.374%, and 12.322% respectively. Theoretically the fiber direction of ±45oshould gives the highest value, but this is not happen because of de-bounding of theGFRP plate from the surface of the beams.
PENGARUH ASAM KARBONAT (H2CO3) TERHADAP KEKUATAN TUMBUKAN AGREGAT BATU KAPUR I. M. Alit K. Salain; M. Dodiek W. Ardana; W. Tahriri
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Chalk or limestone is frequently used for backfill materials and forstabilizing foundation layers of highway because of it’s good support in bearingcapacity. However it is known that carbonate acid (H2CO3), which is soluble in theground water, can dissolve chalks or limestone chemically. The natural acidenvironment is able to decrease the strength (support capability) of backfill andfoundation layer.This study is conducted to determine the effect of carbonate acid on aggregatecollision strength value of limestone (aggregate impact value or AIV). The AIVvalue is one of the indicators used in measuring the strength of aggregate. The AIVindicates that the aggregate was not too strong to receive loads from the burden ofvehicle’s wheel or other load while it is being compacted. The tests on limestonestrength were conducted after soaking the limestone into carbonate acid solution ina series of acid concentration as follows: 5, 10, 15, 20, and 25 parts per million. The soaking process of each solution was carried out for 10, 15, 20, 25, and 30days long. The basic design used was a Factorial Complete Random Design, whichstudied matters such as the variation of carbonate acid concentration and thevariation of soaking time. Then the test results was analyzed using a StyleInvestigation Analysis, Least Significant Different test and Disperse DiagramThe test results show that the variation of concentration from 5 to 25 parts permillion does not significantly affect the strength of limestone aggregate impact, butthe time soaking has a real effect. There is an interaction between the variations ofcarbonate acid concentration solution with the time of soaking.
SISTEM PENILAIAN KINERJA KONSULTAN PERENCANA DALAM MENANGANI PROYEK PERENCANAAN BANGUNAN GEDUNG I Gede Astawa Diputra
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Evaluation of building design consultant performance is needed, becausemost of strategic decisions and project costs depend on the consultant performancethat is implemented in project design documents. The Analytical Hierarchy Process(AHP) method can be used as a reference for assessing the consultant performancein more detail and measurable. The hierarchy of assessment criterions was obtained from the interview in whichthe respondents were building design experts and it was combined with relevantliteratures. The analysis using the AHP method was conducted to compare theimportance level of criterion using pair-comparison matrixes. The weight ofcriterion and sub criterion were calculated by using eigen vector.The result of this study indicates that Quality of Design Document is the mostimportant criterion (41,8%), followed by Relevancy with Term Of Reference(26%), Time Schedule ( 17,7%), and Design Cost (14,5%), which presented atlevel 2. At level 3, Consistency of Design Document is the most important criterion(13,9%), followed by Constructability of Design Document (11,3%), Accuracy ofDesign Document (10,6%), and so on. The last criterion, which has the smallestassessment weight, is the Goal Achievement of the Preparation Phase (4,6%). Atlevel 4, Consistency among Engineering Drawing Document, Specification andCost Estimate is the most important sub-criterion (6,9%), followed by RationalTime Schedule (5,8%), Equivalency of Remuneration with Project Requirement(5,7%) and so on. The last criterion is positioned by Explanation of ConstructionMaterial, which has the smallest assessment weight (0,7%). Based on theassessment hierarchy, which has been completed with global weight of allcriterions, hence the tables of assessment system for building design consultantperformance can be made. Accordingly, the consultants can be classified accordingto their performance levels.
PERMEABILITAS BETON DENGAN PENAMBAHAN STYROFOAM I Gusti Ketut Sudipta; Ketut Sudarsana
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

The purpose of this research is to investigate the relationship betweencoefficient permeability of concrete and volume of granular styrofoam added into aconcrete mix. The styrofoam added to concrete is in order to have concrete with asmaller density.The concrete was mixed using Portland cement type I, sand from Karangasemwhich was proportioned to meet zone 2 of gradation limit, gravels from the samesource as sands which was also proportioned to meet gradation limit withmaximum diameter of 25 mm according to ASTM C 33-74 and round granularstyrofoam with diameter ranges from 3 mm to 10 mm having density of 22,89kg/m3. Concrete mix was proportioned according to the ingrediens weight that is1:2:3, respectively for cement, sand and gravels with water cement ratio of 0.5.Variation of the styrofoam added into the concrete mix is 0%, 10%, 20%, 30%, and40% of total mix volume. The specimens used in this experiment is standardconcrete cylinders with diameter of 150 mm and 300 mm in height. The specimenwas tested at 28 days of age.The experimental results show that the coefficient of concrete permeability increaseswith increasing additional granular styrofoam into the concrete mix. The coeficientof permeability is 2,274x10-9 cm/dt; 4,170x10-9 cm/dt; 7,917x10-9 cm/dt;17,839x10-9 cm/dt; and 42,135x10-9 cm/dt for addition of styrofoam 0%, 10%, 20%, 30%, and 40%, respectively. The relationship between the coeficient of permeabilityand percentage of styrofoam added into the concrete follows a nonlinearregresión curve.
PENGARUH PEMASANGAN ANGKER UJUNG TERHADAP PERILAKU RUNTUH BALOK BETON BERTULANG DENGAN PENAMBAHAN LAPIS GFRP (Glass Fibre Reinforced Polymer) I K. Sudarsana; I B. Rai Widiarsa
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Some researches have shown that critical phenomena on the use of FRPsheets as external reinforcement is de-bounding between the FRP sheet andconcrete. This research was done to investigate the effect of end anchorage onfailure behavior and flexural strength of reinforced concrete beam with additionalGFRP sheet.The test was done on reinforced concrete beam specimens with dimension of 100 x150 x 1100 mm on a simple support having a span length of 900 mm. Thespecimens were loaded using 2 point concentrated loads at 300 mm from thesupports. Three group specimens were made namely control beam withoutadditional GFRP sheets, beam with 2 layer GFRP sheets without end anchorage, beam with 2 layer GFRP sheets with end anchorage type U-shape straps, fastenersand steel bolts. Each group consists of 3 specimens. The data observed during thetest are cracking loads, crack patterns, crack widths, ultimate load capacities,deflections and failure modes.Test results show that end anchorage changes starting point of de-boundingmode failure of the GFRP sheets which is from the point of cut-off to the middlespan of the beams. The addition of end anchorages can increase the ultimateflexural capacity of the beam with 2 layer GFRP sheet about 18.628%, 5.555% and10.131% respectively for end anchorage of fastener, U-shape straps and steel bolts.When it is compared to the capacity of control beam, the ultimate flexural capacityof the beams with end anchorage is higher about 31.373%, 18.3% and 22.876% forend anchorage of fastener, U-shape straps and steel bolts, respectively.
OPTIMALISASI JUMLAH TIPE RUMAH YANG AKAN DIBANGUN DENGAN METODE SIMPLEKS PADA PROYEK PENGEMBANGAN PERUMAHAN Dewa Ketut Sudarsana
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

The challenges that have been faced by housing developers are toformulate the quantity of house type to be built, thus they should fulfill the marketaspect, government rule and gain the maximum profit from their sales. Theobjective of this study is to formulate the best composition of house type quantity,which can result in maximum profit.The data was analyzed by using Simplex method. A case study was taken atdevelopment of Taman Wira Umadui Housing in Denpasar. The types of the houseto be built were categorized into types A, B and C. Type-A (60/120) has 60 m2 ofhouse area, 120 m2 of land area and the price IDR 285.000.000 per unit. Type B(45/100), which has 45 m2 of house area and 100 m2 of land area, was priced at IDR230.000.000 per unit. And type C (36/80), which has 36 m2 of house area and 80 m2of land area, cost IDR 190.000.000 per unit.The result of this study showed that the optimum composition of house typequantity is 28 unit of type A, 17 unit of type B and 54 unit of type C. Themaximum profit that could be earned from this composition was IDR7.171.000.000.
MANAJEMEN PENGANGKUTAN SAMPAH DI KOTA AMLAPURA Mayun Nadiasa; Dewa Ketut Sudarsana; I Nyoman Yasmara
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Base on the existing conditions, garbage transportation in Amlapurastill faces problems. Garbage transportation in rush hour causes traffic jam. Theexisting temporary garbage place (TPS) has not been designed and equipped withdevices that can separate organic and unorganic garbage, thus it is still mixed upin one container. This condition needs a deeper attention in order to improve theexisting garbage transportation management. This research aims to improve the weakness of the current garbage transportationsystem. The SNI No. 19-2454-2002 was used as an approached method to solvethis problem. In order to determine appropriate tariffs that can cover theoperational cost of garbage transportation, the method of financial assessmentwas used namely Net Present value (NPV), Benefit Cost Ratio (BCR), andInternal Rate of Return (IRR).The garbage transportation system chosen for a compactor truck was fixedcontainer transportation mode and for an arm roll truck was empty containertranportation mode. The number of vehicle required to carry out garbagetransportation in Amlapura was 4 compactor trucks for organic garbages, 3compactor trucks for unorganic garbages, and a unit of arm roll truck for organicand inorganic garbages. The reguired time for picking garbage was about sixhours per day. The numbers of TPS needed in Amlapura were 213 bin containerswith capacity of 0.36 m3 for organic TPS and 137 units for the unorganic. It wasalso required 5 units of organic TPS and 3 units of the unorganic that usingcontainers with capacity of 4 m3. It was assumed that this investment would befinanced by 100% of bank loan. The result of this study shows that thisinvestment will be reliable if the applied tarrif is Rp.15.000/family/month forhousehold, Rp.25.000/room/month for hotel, Rp.5000/seat/month for restaurant,Rp.30.000/unit/month for shop, Rp.20.000/unit/month for school and office, Rp.30.000/seller/month for market trader, Rp. 30.000/month for small scale industryand Rp. 40.000/month for middle scale industry.
PENGGUNAAN METODE PENJADWALAN BERULANG (REPETITIVE SCHEDULING METHOD) PADA PENGERJAAN PROYEK PERUMAHAN (Studi Kasus Pada Proyek Perumahan Beranda Mumbul) Anak Agung Wiranata; A.A Diah Parami Dewi; I Made Nuryawan
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Construction project is a process that manages several resources so it canachieve an aim. Planning and scheduling at construction project are related to time,cost and quality required since the balance of those three aspects is the main goalthat will be pursued. There are some scheduling methods which are usually used inconstruction project completion. A Repetitive Scheduling Method is a kind ofscheduling methods that is used for a project which has repetitive activities. Thismethod enables showing resources management that contains of human resources,tools and materials without separating among those aspects. Applying RSM atBeranda Mumbul housing can shorten completion day from 31 weeks to 27 weeksand decrease the cost from Rp. 26.575.454,- to Rp. 25.424.127,- in a unit.
MODEL ESTIMASI TERINTEGRASI BIAYA LANGSUNG PELAKSANAAN KONSTRUKSI DENGAN JADWAL PELAKSANAAN I Gusti Agung Adnyana Putera
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 2 Juli 2009
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Estimation of duration and cost of a project are two classical problemsthat always arise in the real world construction project. In the current practice, thecost is analyzed separately from a planning by estimators. In fact, time and cost ofthe construction project depend on what kind of product to be constructed, how torealize it, when and where it has to be constructed. They have an intimateinterrelationship and can not be separated while analyzing them. When a planningof activities is changed, the project cost would change as well. The existing costmodel does not integrate this relation. The project cost is estimated based on theassumed rates of construction resources and gross quantity of works without takinginto account how the activities will be performed. This paper proposes a cost modelthat can integrate the planning and the construction direct cost based on the dailynecessary resources of the related planning. It presents also some examples of itsapplication. This model is very useful to simulate the real project direct cost froman estimated planning before executing the project. The accuracy of the resultdepends completely on the accuracy of estimated planning and the basicinformation corresponding to time and cost estimation of an elementary activity.

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