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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.
Arjuna Subject : -
Articles 9 Documents
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Search results for , issue "Vol. 12, No. 2 Juli 2008" : 9 Documents clear
KUAT TARIK BELAH DAN LENTUR BETON DENGAN PENAMBAHAN STYROFOAM (STYROCON) I.B. Dharma Giri; I Ketut Sudarsana; N.L.P. Eka Agustiningsih
Jurnal Ilmiah Teknik Sipil Vol. 12, No. 2 Juli 2008
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Application of lightweight material as former structure will reduce total weight of a building. Lightweight concrete is one of the lightweight structural former materials. In making of lightweight concrete, one of alternative material that used is styrofoam. Styrofoam generally used as materials that covering electronic things. Styrofoam use in lightweight concrete can be as air voids. The advantages of styrofoam than air void in lightweight concrete are that styrofoam have tensile strength. According to those, the aims of this research were to obtain the influence of adding styrofoam to volume of weight, splitting tension and modulus of rupture. The specimens for splitting test were cylinders with dimension of 150 mm in diameter and 300 mm in height and specimens for modulus of rupture were beam with dimension of 150 x 150 x 600 mm. Seven specimens were used for splitting test and 3 for modulus rupture test for any variation of percentage increased of styrofoam. Concrete was made by weight comparison of 1 : 2 : 3. The amount of cement in 1 m3 concrete mixture was 400 kg. Variation of percentage increased styrofoam were 0%, 10%, 20%, 30%, 40% to volume of mixture. The range diameter granular styrofoam are 3 – 10 mm with volume of weight of 22,89 kg/m3. Slump test is done to fresh concrete, volume of weight measurement, splitting and modulus rupture test were done after 28 days. Result showed that increased of styrofoam increased the slump value. Volume of weight and splitting tension decreased linearly. The adding of 10% granular styrofoam decreased the volume of weight and splitting tension by 81,08 kg/m3 (4,01%) and 0,34 MPa (12,19%), respectively. The change of modulus rupture value at 10% adding of styrofoam was 22,67% and at 20% adding of styrofoam was 29,62% to concrete without adding of Styrofoam. However at 30% adding of Styrofoam, modulus rupture increased by 1,21% to concrete with 20% adding of styrofoam.
MODEL PENGGUNAAN LAHAN UNTUK BANGUNAN DI WILAYAH PERKOTAAN PROVINSI BALI I Gusti Ketut Sudipta; IGA. Adnyana Putera; I Gusti Putu Suparsa
Jurnal Ilmiah Teknik Sipil Vol. 12, No. 2 Juli 2008
Publisher : Department of Civil Engineering, Udayana University

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Abstract

The growth of the land use for building in Bali Province may pose problems in the foreseeable future. The primary objective of the research has been to assess the relation of the land use area for the building against time in the period to come, how long the land could support the growth of the land use for building and to identify the regulating method of the land use for building in urban territory of Bali Province in order to be able to sustain long term growth. The research data consisted of the area of the settlement, tourism and cultivation zones that were obtained from The Revised Map of The Bali Province Spatial Planning 2003. The rest of the research data consisted of buildings number and land user in form of data series that were obtained through documents registration technique. Results of the analysis showed that: the forecasted annual growth of land use for building in urban territory of Bali Province was 2.32%; the settlement zone could only support the growth of the land use for the building up until 2013; the tourism zone could support the growth for much longer time; the cultivation zone will be fully used in 2072; efforts so that the land could support the growth of the land use for building longer in urban territory of Bali Province were to reduce population growth or to reduce land use area designated for 1 building user.
PENGARUH PENAMBAHAN POZZOLAN ALAM BATU APUNG TERHADAP KARAKTERISTIK GENTENG (STUDI KASUS GENTENG PLENTONG EX. PEJATEN) I Putu Ari Sanjaya
Jurnal Ilmiah Teknik Sipil Vol. 12, No. 2 Juli 2008
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Research about influence of addition of natural pozzolan pumice in making of Pejaten ceramic tile was conducted. This research was conducted based on condition that in the recent time the tile industries in Bali have experienced degradation of quality compared to existing marketing tile. The natural pozzolan pumice was selected as an additive because this pumice is less exploited and highly contained SiO2 component. If burned this component will yield silica/glass materials and filled the tile void. This research was conducted to obtain the influence of addition of natural pozzolan pumice to ceramic tile characteristics such as bending strength, water absorption, and water infiltration. The ceramic tiles were made by mixing of clay, paras powder, natural pozzolan pumice and water. The mixture consisted of paras powder counted by 20% from clay weight, natural pozzolan of pumice counted by percentage addition of paras powder. Addition of natural pozzolan pumice was 5%, 10%, 15% from paras powder weight. The process started from preparation of materials, mixing of materials, hulling, molding, draining and burning at the stove for about 12 hours with temperature of 800oC to 1000oC. Results of the research showed that the addition of 15% natural pozzolan pumice resulted in smallest water absorption, longest time of water infiltration. The value of bending load of the tile was 71,30 kg and bending strength was 0,675 kg/mm2. For plain part of the tile, the average bending load was 14,40 kg and bending strength was 0,250 kg/mm2. The water absorption rate was equal to 26,39% and time of water infiltration was 99 minutes. Shrinkage happened in tile with addition of 15% of natural pozzolan pumice with contraction value of 7,27% in long and contraction value of 9,20% in wide. Standard tile had smaller value of bending load and bending strength than the tile with 15% of natural pozzolan pumice addition, with were 54,90 kg and 0,520 kg/mm2, respectively. For the plain part of standard tile, the value of bending load and bending strength were 11,80 kg and 0,205 kg/mm2, respectively. Largest water absorption value of tile occurred in ceramic tile with addition of natural pozzolan pumice of 5%, which had value of 27,60%. These tiles had fastest water infiltration time with a value of 68 minutes.
ANALISIS KARAKTERISTIK DAN PEMODELAN KEBUTUHAN PARKIR PADA PUSAT PERBELANJAAN DI KOTA DENPASAR I Ketut Sutapa; Putu Alit Suthanaya; I Wayan Suweda
Jurnal Ilmiah Teknik Sipil Vol. 12, No. 2 Juli 2008
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Shopping centres in Denpasar are faced with parking supply problems. One of the problems is the difficulty in providing sufficient parking spaces based on actual demand. Efficiency of parking supply can be achieved if parking supply meets actual demand. This research is conducted in order to know parking characteristic, the degree of relation ship between parking demand and parameters of shopping centres as independent variables, to develop parking demand model and to analyse parking demand standard for shopping centres in Denpasar. Primary and secondary data are required in order to know parking characteristics. Primary data were obtained from direct observation onsite which include: parking vehicles data, number of visitor & parking inventory. Primary data were obtained from one day survey an Saturday between 09.00 am to 09.30 pm at each shopping centres. Secondary data (i.e. parameters of shopping centres) were obtained from the management of shopping centres. Shopping centres included in this study are: Robinson, Alfa Imam Bonjol, Ramayana Bali Mall, Tiara Grosir, Alfa Diponegoro and Hardy’s Sesetan. Parking demand models were developed by using simple & multiple regression methods with the help of SPSS 15.0 software. Independent variables included in this study are: floor area, netto floor area, service floor area, number of permanent employees, number of non-permanent employees, number of cashier and number of visitors. The dependent variables are average parking accumulation for car, motor cycle and taxi. Parking demand standards were calculated based on regression analysis of parking demand and shopping centres parameters. The results of the simple regression analysis showed that the relationship between car parking demand and number of non-permanent employees (X5) was indicated by regression formula : Y1 = -1,805 + 0,358.X5 (R2 = 0,965), where the car parking demand standard was 1,097 spaces/person. The relationship between motor cycles parking demand and number of non-permanent employees (X5) was indicated by regression formula: Y2 = -24,497 + 2,059.X5 (R2 = 0,873), where the motor cycles parking demand standard was 6,205 spaces / person. The relationship between taxi parking demand and number of non-permanent employees (X5) was indicated by regression formula: Y3 = -1,262 + 0,037.X5 (R2 = 0,915), where the taxi parking demand standard was 0,001 spaces / person. The results of the multiple regression analysis showed that the relationship between car parking demand and number of non-permanent employees (X5) was indicated by regression formula : Y1 = -1,805 + 0,358.X5 (R2 = 0,965). The relationship between motor cycles parking demand and combination number of permanent employees (X4) with number of non-permanent employees (X5) was indicated by regression formula : Y2 = 135,401 – 1,200.X4 + 2,829 (R2 = 0,972). The relationship between taxi parking demand and number of non-permanent employees (X5) was indicated by regression formula: Y3 = -1,262 + 0,037.X5 (R2 = 0,915).
PENGENDALIAN BIAYA DAN JADUAL TERPADU PADA PROYEK KONSTRUKSI. Dewa Ketut Sudarsana
Jurnal Ilmiah Teknik Sipil Vol. 12, No. 2 Juli 2008
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Cost, performance and time are the major constrain resources in project execution. The important action to find project objective with limited resources are planning, scheduling and controlling. “Earned Value” concept is a method to integrated project cost and project schedule controlling. This method informed the project performanced in period reporting and to predict the total project cost completion and the project time completion based on performances indicator reporting. In case study on periodic 91st day reporting at ”Pembangunan Gedung Instalasi Rehabilitasi Medik” Center Public hospital Sanglah, the progress information such as Planed Value (PV)= IDR 1,4325 billion, Earned Value (EV) = IDR 1,3747 billion and Actual Cost (AC)= IDR 1,3598 billion. In this report the cost project performance had profit (Cost Varian, CV = + IDR 0,01 billion and Cost Performed Index ,CPI=1,01>1). But the schedule performanced project has been delayed (Schedule Varian, SV = - IDR 0.06 billion and Schedule Performmance Index, SPI =0,96 <1). If this project performanced continued until the project completion, the project cost completion has been estimated about IDR 2,8683 billion, that is under the budget (< IDR 2.8998 billion). However, the estimated project schedule required 129 days, which showed the project schedule will be delayed 2 days from the schedule plan.
KOMBINASI PRELOADING DAN PENGGUNAAN PRE-FABRICATED VERTICAL DRAINS UNTUK MEMPERCEPAT KONSOLIDASI TANAH LEMPUNG LUNAK (STUDI KASUS TANAH LEMPUNG SUWUNG KANGIN) Anissa Maria Hidayati; Made Dodiek Wirya Ardana
Jurnal Ilmiah Teknik Sipil Vol. 12, No. 2 Juli 2008
Publisher : Department of Civil Engineering, Udayana University

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Abstract

In general, soil on mangrove forest formed from deposit of clay, silt and organic matter with high water content. The soil is impermeable with very high compressibility potential and provide low bearing capacity. Due to these soil cha-racteristics, the soil tends to experience a large value of settlement. A combination of preloading method and pre-fabricated vertical drains (PVD) installation is an improvement method to exceed the soil consolidation process. A series of pre-loading load are applied on a soil layerin order to produce stress to trigger the soil consolidation preocess. Whilst, the insertion of PVD is aimed to shorten the drainage path for the drained water from the soil body to the respective surface. The objective of the study is to determine the conventional consolidation time and it’s comparison to the consolidation time obtained from teh combination of preloading and PVD in the same degree of primary consolidation. The study results on soft clay soil on Suwung Kangin resort show a valueable result to speed up the time of primary consolidation process. In addition, the combination of preloading and pre-fabricated vertical drains demonstrate an improvement in soil bearing capacity. A equilateral trianggular PVD insertion pattern with 1 m in spacing to a depth of 16 m in soft clay soil layer are able to speed up the primary consolidation time of 7276.84% on the design load. Slope stability analysis to circular failure on preloading embankment show a value of factor safety greater than 1.
KORELASI KEKUATAN GESER UNDRAINED TANAH LEMPUNG DARI UJI UNCONFINED COMPRESSION DAN UJI LABORATORY VANE SHEAR (STUDI PADA REMOLDED CLAY) Made Dodiek Wirya Ardana
Jurnal Ilmiah Teknik Sipil Vol. 12, No. 2 Juli 2008
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Strength test result of a soil investigation report often present a different value to the measured in-situ strength. It is become a constrain in using the value of soil parameter for foundation design on soft clay soil. Depends on the testing apparatus characteristic, test results from a different apparatus may differ even for a duplet samples. This may occur due to the different of procedure and the work mechanism of apparatus itself in determining the soil parameter. The goal of this study is to determine the correlation between test results of Su (undrained shear strength) of very soft to stiff clay obtain from Unconfined Compression Strength Test and Laboratory Vane Shear Test. The test results show a correlation of undrained shear strength values obtain from those two apparatus as follows : Su (vane) = 0.6214 . Su(uct) + 0.0028 atau Su (uct) = 1.5464. Su(vane) + 0.0049. Su obtain from vane shear test show a lower value of 37 % in comparisson with Unconfined Comporession values.
FINITE ELEMENT MODELS OF POST-TENSIONED MASONRY COLUMNS Ida Ayu Made Budiwati
Jurnal Ilmiah Teknik Sipil Vol. 12, No. 2 Juli 2008
Publisher : Department of Civil Engineering, Udayana University

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Abstract

Applications of finite element method in modelling dynamic problems can be used to predict structural dynamic behaviour. In this paper the post-tensioned masonry column was modelled in 2D and 3D using two finite element analysis computer programs, LUSAS and ABAQUS. The frequency analyses were carried out to determine natural frequencies and the corresponding mode shapes of post-tensioned masonry columns. The effects of increasing post-tension force on the natural frequencies of the columns were determined A comparison was made between the 2D and 3D models and also between the two programs used by way of their natural frequency results. It has been shown that the natural frequencies of post-tensioned masonry column with zero post-tension force comprise the natural frequencies of its individual components (the masonry column with the concrete cap only and the post-tensioning bar only). With increasing post-tension force the natural frequency increased. Natural frequencies obtained using 2D models were in general higher than those of 3D models and ABAQUS results were almost smaller than LUSAS results. Nevertheless, it is appropriate to model dynamic behaviour of post-tensioned masonry in 2D and to use any of the two programs.
ANALISIS PERBANDINGAN RISIKO BIAYA ANTARA KONTRAK LUMPSUM DENGAN KONTRAK UNIT PRICE MENGGUNAKAN METODE DECISION TREE I Gusti Ngurah Oka Suputra; Ariany Frederika; Putu Sukma Wahyuni
Jurnal Ilmiah Teknik Sipil Vol. 12, No. 2 Juli 2008
Publisher : Department of Civil Engineering, Udayana University

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Abstract

There are two things that always emerge from every business activity, earning profit or suffering from risk of loss, directly or indirectly, including in construction business. Many efforts have been done by contractors as the service provider, to avoid or to mitigate risk, in order to achieve the effective result. One of these is by analyzing risk in terms of the type of project contract. The selection and implementation of contract type is expected to have more positive values, although the negative effects can also come forward. The type of contract that frequently used in construction project is lumpsum and unit price contract. Thus, it is necessary to know comprehensively the advantages and disadvantages of the implementation of these two types of contract by using Decision Tree method. This method can provide comparison between lumpsump contract and unit price contract based on the value of Expected Opportunity Loss (EOL) of each contract. The value of EOL can be obtained from multiplication of probability and expectation value (NE) of every risk event that potentially causes cost-overrun. The higher of the EOL value of each risk event, the higher of the loss can be suffered. Data was retrieved from questionnaires that distributed to contractors in Gianyar Regency (32 respondents). The result of risk comparison based on types of contract related to cost aspect (as the factor of cost-overrun) showed that lumpsum contract has higher risk of loss compare to unit price contract. It can be seen from the value of EOL of this contract (80,079 %) that is higher than the other one (59,924 %).

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