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Civil Engineering Dimension
ISSN : 14109530     EISSN : 1979570X     DOI : -
Core Subject : Engineering,
The Civil Engineering Dimension (Dimensi Teknik Sipil) is a refereed journal, published twice a year, in March and September.
Arjuna Subject : -
Articles 7 Documents
Search results for , issue "Vol. 3 No. 1 (2001): MARCH 2001" : 7 Documents clear
ALTERNATIF METODA PENJADWALAN PROYEK KONSTRUKSI MENGGUNAKAN TEORI SET SAMAR Andreas Wibowo
Civil Engineering Dimension Vol. 3 No. 1 (2001): MARCH 2001
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (194.653 KB) | DOI: 10.9744/ced.3.1.pp. 1-8

Abstract

Program Evaluation Review Technique %28PERT%29 is a scheduling method that consider the uncertainty of the duration of an activity. It assumes a probability density function with a beta distribution. PERT simplifies the analysis using specific values of parameters of beta distribution. The analysis of critical paths consider the mean of the duration only and the probability of the expected total duration are based on critical paths only. Some cases showed that these simplifications cause errors and contradictions. This paper proposes an alternative scheduling method that also allows uncertainties of duration. The method%2C named Fuzzy Logic Application for Scheduling %28FLASH%29%2C applies a fuzzy set theory which is a perfect means for modeling uncertainties arising from mental phenomena which are neither random nor stochastic. It does not require statistical data but needs qualitative observations. Unlike PERT%2C FLASH considers all paths%2C not only critical path%28s%29%2C to analyze the possibility of an expected total duration. Abstract in Bahasa Indonesia : Program Evaluation Review Technique %28PERT%29 merupakan suatu metoda penjadwalan dengan menimbang durasi aktivitas yang bersifat tidak pasti. PERT mengasumsikan fungsi kerapatan probabilitas durasi aktivitas mengikuti distribusi beta. Analisis dalam PERT disederhanakan dengan menggunakan nilai-nilai tertentu parameter distribusi beta. Penentuan jalur kritis hanya menimbang mean durasi untuk menentukan jalur kritis%2C dan probabilitas total durasi didapatkan berdasarkan jalur kritis saja. Beberapa kasus menunjukkan penyederhanaan ini menimbulkan galat dan kontradiksi. Tulisan ini mengusulkan metoda penjadwalan alternatif yang juga menimbang durasi yang bersifat tidak pasti. Metoda ini%2C yang dinamakan Fuzzy Logic Application for Scheduling %28FLASH%29%2C menerapkan teori set samar sebagai satu cara untuk memodelkan ketidakpastian yang muncul dari fenomena mental yang bukan bersifat acak maupun stokastik. FLASH tidak mensyaratkan data statistis tetapi hanya pengamatan secara kualitatif. FLASH mempertimbangkan semua jalur%2C tidak hanya jalur kritis saja seperti PERT%2C untuk menganalisis posibilitas suatu total durasi yang diharapkan. scheduling+method%2C+FLASH%2C+PERT%2C+probability%2C+possibility%2C+fuzzy+set.
A CASE STUDY ON TOTAL BUILDING PERFORMANCE EVALUATION OF AN INTELLIGENT OFFICE BUILDING IN SINGAPORE Po Seng Kian; Henry Feriadi; Wiliana Sulistio; Kong Chee Seng
Civil Engineering Dimension Vol. 3 No. 1 (2001): MARCH 2001
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (461.477 KB) | DOI: 10.9744/ced.3.1.pp. 9-15

Abstract

The importance of understanding the performance of a building in a holistic sense is undeniable. This paper presents a method of total building performance evaluation, which has been widely used in many developed countries including Singapore. An office building with apartment and commercial retails called “intelligent building” is selected for building diagnosis. The occupant surveys and physical walkthroughs are carried out as subjective evaluations, while some objective measurements of indoor air quality and visual quality are also introduced in this study. The results indicate that generally, the occupants are satisfied with the quality of the building despite some insignificant indoor air quality and visual symptoms due to low temperature and glare problem in the office.
ANALISIS HUBUNGAN SISTEM BANGUNAN DENGAN KINERJA TOTAL DAN INTEGRASI BANGUNAN PADA BERBAGAI GEDUNG BERTINGKAT DI SURABAYA Herry Pintardi Chandra
Civil Engineering Dimension Vol. 3 No. 1 (2001): MARCH 2001
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (168.362 KB) | DOI: 10.9744/ced.3.1.pp. 16-23

Abstract

Factors in building system design have target in achieving maximum performance when they have proper correlation with total performance and building integrity. The purpose of this research is to find out the influence of building system: structural, envelope, mechanical and interior, to the performance and building integrity: spatial, thermal, indoor air quality, acoustical, and performance visual and building integrity. The analysis shows that: Structural system has dominant influence to the spatial performance, indoor air quality and building integrity (mean 4,75), envelope system has dominant influence to the thermal performance (mean 4,75), mechanical system has dominant influence to the visual performance (mean 5,00), interior system has dominant influence to the spatial performance (mean 4,75), In conclusion, there are differences in which building systems affect the total performance and building integrity. Abstract in Bahasa Indonesia : Faktor-faktor dalam desain sistem bangunan mempunyai sasaran dalam mencapai kinerja maksimum bila memiliki hubungan yang sesuai dengan kinerja total dan integrasi bangunan. Penelitian ini bertujuan untuk mengetahui sejauhmana faktor-faktor dalam sistem bangunan: structural, envelope, mechanical dan interior berpengaruh terhadap kinerja dan integrasi bangunan: spatial, thermal, indoor air quality, acoustical dan visual performance serta building integrity. Dari hasil analisis data, didapat: Structural system memiliki pengaruh yang dominan terhadap spatial performance, indoor air quality dan building integrity (mean 4,75), envelope system memiliki pengaruh yang dominan terhadap thermal performance (mean 4,75), mechanical system memiliki pengaruh yang dominan terhadap visual performance (mean 5,00), interior system memiliki pengaruh yang dominan terhadap spatial performance (mean 4,75). Disimpulkan bahwa terdapat perbedaan pengaruh desain sistem terhadap kinerja total dan integrasi bangunan.
PENELITIAN PENDAHULUAN PENGGUNAAN BENDA UJI KUBUS BETON PADA PERKERASAN LENTUR TYPE CEMENT TREATED BASE CTB Harry Patmadjaja; Suhartono Irawan
Civil Engineering Dimension Vol. 3 No. 1 (2001): MARCH 2001
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (167.828 KB) | DOI: 10.9744/ced.3.1.pp. 24-29

Abstract

Cement Treated Base is a structural layer using Portland Cement as a bonding agent.Until now CTB is not commonly used in Indonesia, so the production method does not develop and the testing procedures is not standardized. AASHTO 1986 specifies a testing procedure for CTB using Unconfined Compressive Strength (UCS). The sample used is a cylinder with diameter 7,1 cm and height 14,2 cm, which is not common in Indonesia. In Indonesia a 15x15x15 cm3 cube sample is more common. This paper is a preliminary laboratory research to get the relation between the compressive strength of a 15x15x15 cm3 cube with the UCS of a 7.1 cm diameter and 14.2 cm height cylinder. The result shows that a 0.65 multiplication factor is needed to convert the cube compressive strength to the cylinder UCS. Abstract in Bahasa Indonesia : Cement Treated Base (CTB) adalah salah satu type perkerasan lentur dengan menggunakan semen portland sebagai bahan pengikat. Saat ini CTB belum umum digunakan di Indonesia sehingga teknik pembuatannya belum berkembang dan pengujiannya belum dibakukan. AASHTO 1986 menggunakan cara Unconfined Compressive Strength (UCS) untuk pengujian CTB. Pengujian dilakukan pada benda uji berbentuk silinder dengan diameter 7,1 cm dan tinggi 14,2 cm, yang tidak umum digunakan di Indonesia. Di Indonesia lebih umum digunakan benda uji berbentuk kubus 15x15x15 cm3. Penelitian ini merupakan penelitian pendahuluan di laboratorium untuk mencari hubungan antara kekuatan tekan benda uji bentuk kubus 15x15x15 cm3 dan UCS benda uji silinder diameter 7,1 cm dengan tinggi 14,2 cm. Dari penelitian ini dihasilkan suatu faktor pengali sebesar 0,65 untuk mengubah kuat tekan kubus menjadi UCS silinder.
PENGGUNAAN FLY ASH DAN VISCOCRETE PADA SELF COMPACTING CONCRETE Handoko Sugiharto; Gideon Hadi Kusuma
Civil Engineering Dimension Vol. 3 No. 1 (2001): MARCH 2001
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.247 KB) | DOI: 10.9744/ced.3.1.pp. 30-35

Abstract

Self Compacting Concrete (SCC) gives a new solution in concrete technology, since SCC does not need vibrator for compacting. SCC has been used and developed abroad, however in Indonesia SCC is not used because there is no research about SCC yet. In this preliminary research, trial mix is performed to understand the characteristics and to calculate the materials composition to be used in SCC. From this trial mix, some variables are fixed and others are varied. This variable is examined further in the next trial mix. The workability is examined using slump cone method and flowability using L-shaped box. From this test, it is found out that to get the condition of self compactibility, viscocrete must be used. The binder (cement-fly ash) composition, is examined using 10:0, 8:2, 7:3, 6:4 cement to fly ash ratio, until the maximum of flowability and workability, which is 5:5. Viscocrete dose 1.5 % and 2 % did not show a significant difference for all binder composition. From the workability, flowability and strength point of view, binder composition 6:4 and viscocrete dose 1.5 % gives the optimal condition. Abstract in Bahasa Indonesia : Self Compacting Concrete (SCC) memberikan solusi baru dalam dunia teknologi beton karena tidak memerlukan vibrator untuk pemadatannya. SCC telah digunakan dan dikembangkan di luar negeri, tetapi di Indonesia belum begitu dikenal, dikarenakan belum adanya penelitian tentang SCC di Indonesia. Pada penelitian awal ini dilakukan trial mix untuk mengetahui karakteristik dan memperkirakan komposisi bahan yang dibutuhkan untuk SCC. Kemudian dari trial mix tersebut ditetapkan variabel-variabel berubah dan variabel-variabel tetap yang akan diuji pada trial mix selanjutnya. Pengujian workability dilakukan dengan alat slump cone sedangkan pengujian flowability dilakukan dengan alat L-shaped box. Dari hasil pengujian yang telah dilakukan, ternyata harus digunakan viscocrete untuk mendapatkan kondisi self compactibility. Untuk komposisi semen dengan bahan pengisi fly ash dilakukan dengan komposisi binder (semen : fly ash) 10:0, 8:2, 7:3, 6:4 dan sampai batas flowability dan workability yang dapat dikerjakan, yaitu 5:5. Penggunaan dosis viscocrete 1.5 % dan 2 % tidak menunjukkan perbedaan yang signifikan pada tiap komposisi binder. Dari segi workability, flowability dan kuat tekan beton, komposisi binder 6:4 dan dosis viscocrete 1.5 % merupakan kondisi yang optimal.
THE USE OF OUTRIGGER AND BELT TRUSS SYSTEM FOR HIGH-RISE CONCRETE BUILDINGS Po Seng Kian
Civil Engineering Dimension Vol. 3 No. 1 (2001): MARCH 2001
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (423.699 KB) | DOI: 10.9744/ced.3.1.pp. 36-41

Abstract

The outrigger and belt truss system is commonly used as one of the structural system to effectively control the excessive drift due to lateral load, so that, during small or medium lateral load due to either wind or earthquake load, the risk of structural and non-structural damage can be minimized. For high-rise buildings, particularly in seismic active zone or wind load dominant, this system can be chosen as an appropriate structure. This paper studies the use of outrigger and belt truss system for high-rise concrete building subjected to wind or earthquake load. Eight 40storey two dimensional models of outrigger and belt truss system are subjected to wind load; and five 60storey three dimensional models are subjected to earthquake load, analyzed and compared to find the lateral displacement reduction related to the outrigger and belt system location. For the two dimensional 40storey model, 65% maximum displacement reduction can be achieved by providing first outrigger at the top and second outrigger at the middle of the structure height. For the three dimensional 60storey structural model subjected to the earthquake load, about 18 % reduction in maximum displacement can be achieved with optimum location of the outrigger truss placed at the top and the 33rd level.
APLIKASI MATERIAL REQUIREMENT PLANNING UNTUK MENGENDALIKAN INVESTASI PENGADAAN MATERIAL PADA PT. JHS PILLING SYSTEM Herry P. Chandra; Harry Patmadjaja
Civil Engineering Dimension Vol. 3 No. 1 (2001): MARCH 2001
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (374.902 KB) | DOI: 10.9744/ced.3.1.pp. 42-50

Abstract

Material Requirement Planning is a method to decide what, when and how many component and material needed for the production planning. This research studies how far the Material Requirement Planning's application could control material stock investment at PT. JHS Pilling System. Research results shows that using Material Requirement Planning method give a lower value of cummulative material investment and overdue investment than PT. JHS Pilling System current cost. Abstract in Bahasa Indonesia : Material Requirement Planning adalah suatu metode untuk menentukan apa, kapan dan berapa jumlah komponen dan material yang dibutuhkan untuk memenuhi kebutuhan dari suatu perencanaan produksi. Penelitian bertujuan untuk mempelajari sejauh mana aplikasi Material Requirement Planning dapat mengendalikan investasi pengadaan material pada PT. JHS Pilling System. Hasil penelitian menunjukkan bahwa aplikasi metode Material Requirement Planning memberikan nilai cumulative material investment dan overdue investment yang lebih rendah daripada pengeluaran PT. JHS Pilling System saat ini.

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