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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 412 Documents
Effect of the Use of Metakaolin Artificial Lightweight Aggregate on the Properties of Structural Lightweight Concrete Puput Risdanareni; Afif Achsanul Choiri; Boedya Djatmika; Poppy Puspitasari
Civil Engineering Dimension Vol. 19 No. 2 (2017): SEPTEMBER 2017
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (425.241 KB) | DOI: 10.9744/ced.19.2.86-92

Abstract

This paper investigates the effect of using metakaolin Artificial Lightweight Aggre­gates (ALWA) as a substitute for coarse aggregates to produce structural lightweight concrete. A combination of 10M NaOH solution and sodium silicate solution was used as alkali activator. The ratio between the metakaolin binder and the alkali activator used in producing metakaolin ALWA is 48%:52%, by mass. It is shown that metakaolin ALWA has higher abrasion and water absorption, and lower bulk density values compared to normal aggregates. To determine the effect of using metakaolin ALWA as coarse aggregates in concrete, three variations of ALWA dosages were used, i.e. 0%, 50%, and 100% of the total coarse aggregates, by volume. The results show that the compressive strength of concrete decreased along with the increase of ALWA content in the mixture. However, concrete using 100% ALWA as coarse aggregates meets the requirements of compressive strength and density of structural light weight concrete.
CPT-Based Interpretation of Pile Load Tests in Clay-Silt Soil Prakoso W.A.
Civil Engineering Dimension Vol. 13 No. 1 (2011): MARCH 2011
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (373.195 KB) | DOI: 10.9744/ced.13.1.6-14

Abstract

Two pile axial load tests were performed in a site in Depok, West Java. The soil of the site is predominantly a silt-clay soil, characterized by seven mechanical cone penetration tests (CPTs). The piles were 5.5 m long and 11.5 m long, 250 mm square piles. The results of the static load tests showed that the ultimate capacities were achieved. The axial load tests were subsequently back-analyzed using an axisymmetric finite element model using PLAXIS. In the back-analyses, the soil modulus and shear strength in the model, using the cone penetration resistance as the reference, were adjusted so that the numerical load-settlement curves matched the actual curves. The results of the back-analyses are then synthesized with the results of the CPTs, and are compared with available design guidelines. Some recommendations are then proposed.
Application of Prefabricated Vertical Drain in Soil Improvement Tedjakusuma B.
Civil Engineering Dimension Vol. 14 No. 1 (2012): MARCH 2012
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (923.516 KB) | DOI: 10.9744/ced.14.1.51-56

Abstract

Although the use of Prefabricated Vertical Drain (PVD) in soil improvement is not new, this paper is interesting since it gives the full spectrum from preliminary design stage; trial embankment and pilot test to final soil improvement. The final installation of the PVD was based on the soil investigation report and the results of instrumentation monitoring. Finally, using back analysis, vertical and horizontal coefficients of consolidation and compression index can be determined, which can be applied to predict a more accurate prediction of settlement.
STABILISASI TANAH LIAT SANGAT LUNAK DENGAN GARAM DAN PC (PORTLAND CEMENT) Tirta Djusman Arief
Civil Engineering Dimension Vol. 8 No. 1 (2006): MARCH 2006
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (130.213 KB) | DOI: 10.9744/ced.8.1.pp. 20-24

Abstract

Adding sodium chloride, as admixture, and Portland Cement, as stabilizer, to a very soft clay increase its plasticity index (PI), Californian Bearing Ratio (CBR), and Unconfined Compression Strength (UCS). This paper presents the results of testings done to very soft clay from Margomulyo, Surabaya. The results show a promising tendency. Anyhow a wider and comprehensive research is still needed to ensure the long-term effect of the soil stabilization. Abstract in Bahasa Indonesia : Penambahan garam (sodium chloride) dan PC (Portland Cement) meningkatkan PI (Plasticity Index), CBR (Californian Bearing Ratio), dan UCS (Unconfined Compression Strength) dari tanah lempung sangat lunak. Dalam makalah ini disajikan hasil pengujian yang dilakukan terhadap lempung sangat lunak dari daerah Margomulyo, Surabaya. Hasilnya menunjukkan kecenderungan yang menggembirakan, namun penelitian yang luas dan komprehensif masih diperlukan untuk peningkatan stabilitas tanah dalam jangka panjang.
Experimental Investigations of Effect of Sulphur on Beach Sand–Fly Ash–Asphalt (S-F-A) Paving Mixes Satyakumar, M.; Satheeshchandran, R.
Civil Engineering Dimension Vol. 15 No. 1 (2013): MARCH 2013
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.605 KB) | DOI: 10.9744/ced.15.1.36-42

Abstract

The main components of the flexible pavements are asphalt and aggregates. But in most of the places in India there is shortage of the good quality aggregates (especially coarse aggregates), at the same time beach sand is available in plenty in many regions. Due to relative abundance of beach sand, the studies on the utilities of the beach sand in paving mixes are worth taking up. But beach Sand-Asphalt mix alone is not suitable for pavement construction, because of its low stability and high air voids. In the present study, Sand-Fly ash-Asphalt-Sulphur (S-F-A-S) mixes are being made in different proportions and tested for their properties. Fatigue strength, stability, water sensitivity, stiffness modulus and dynamic modulus tests are carried out at standard test conditions and the results are analyzed for drawing conclusions. This study investigates the potential use of abundant ingredients, which may replace the ones which are scarce in nature.
Derivation Of Moving Least-Squares Approximation Shape Functions And Its Derivatives Using The Exponential Weight Function Effendy Tanojo
Civil Engineering Dimension Vol. 9 No. 1 (2007): MARCH 2007
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (230.133 KB) | DOI: 10.9744/ced.9.1.pp. 19-24

Abstract

In recent years, meshless methods have gained their popularity, mainly due to the fact that absolutely no elements are required to discretize the problem domain. This is possible due to the nature of the approximation functions used in this method. Approximation functions used to form the shape functions use only the so-called “nodal selection” procedure without the need of elements definition. The most popular approximation function used is the moving least-squares shape functions. Published works in meshless methods, however, present only the basic formulas of the moving least-squares shape functions. This paper presents the complete and detailed derivations of not only the moving least-squares shape functions, but also their derivatives (up to the second order derivatives), using the exponential weight function. The derivations are then programmed and verified.
TINJAUAN TERHADAP PEMBATASAN DIMENSI TEMBOK PENGISI YANG MENERIMA BEBAN MUKA AKIBAT GEMPA Takim Andriono; Gideon Hadi Kusuma
Civil Engineering Dimension Vol. 2 No. 1 (2000): MARCH 2000
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (69.642 KB) | DOI: 10.9744/ced.2.1.pp. 1-8

Abstract

In order to anticipate the impact of face loading due to severe earthquakes on infilled wall panels of a frame structure, the maximum area or span of these panels needs to be restricted as recommended in the Design Manual for Ordinary Reinforced Concrete Structures and Reinforced Wall Structures 1983. However, this restriction is merely based on the seismic zone and soil condition where the structure is located; the wall's position, whether it is on the ground or top floor and whether it is located inside or on the perimeter of the building. A study which was carried out to re-evaluate the above recommendation found that there are some other parameters which need also to be considered, such as the width of brick units, the effective wall thickness, the ratio of clear height to span of wall panel. Furthermore, for design purposes, it is suggested to put into consideration the crack state condition of walls due to seismic face loads. Abstract in Bahasa Indonesia : Dalam rangka mengantisipasi terjadinya beban muka akibat gempa kuat yang bekerja pada bidang dinding pengisi suatu struktur rangka, luas maksimum atau bentang bidang dinding perlu dibatasi seperti yang direkomendasikan dalam Pedoman Perencanaan untuk Struktur Beton Bertulang Biasa dan Struktur Tembok Bertulang untuk Gedung 1983. Namun, pembatasan ini tampak hanya bergantung pada wilayah gempa dan kondisi tanah dimana bangunan berada serta posisi tembok, apakah di lantai dasar atau puncak gedung dan apakah dinding terletak di dalam atau di sekeliling luar bangunan. Sebuah studi yang telah dilakukan untuk mengevaluasi kembali ketentuan pembatasan tersebut di atas menyimpulkan bahwa terdapat beberapa parameter lain yang seharusnya juga diperhitungkan, seperti lebar unit bata, tebal efektif dinding, rasio tinggi beban dinding terhadap lebar bentangnya. Di samping itu, untuk keperluan perencanaan diusulkan pula agar tahap kondisi retak dinding akibat beban muka diperhitungkan pula. Kata kunci: tembok pengisi, beban muka, tahap kondisi retak tembok
Travel Time Estimation and Prediction using Mobile Phones: A Cost Effective Method for Developing Countries Satyakumar, M.; Anil, R.; Sivakumar, B.
Civil Engineering Dimension Vol. 16 No. 1 (2014): MARCH 2014
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (369.222 KB) | DOI: 10.9744/ced.16.1.33-39

Abstract

Conventional data collection methods lack real time information and involve excessive cost of installation and maintenance. A real-time, low cost travel time data collection system can be developed using mobile phones. This project examines the use of mobile phones for travel time prediction of public transit vehicles and develops a dynamic travel time prediction model. Personnel were employed in public transit vehicles with mobile phones and these mobile phones were tracked continuously. Space information of the mobile phones represents the position of the buses and movement pattern of these mobile phones in turn represents the movement pattern of the public buses. The starting and arrival time at sections obtained from the cellular database were used to get the travel time and speed. Results obtained were statistically significant and it shows that use of mobile phone for travel time data collection is a low cost data collection technique for Indian cities.
Evaluation of The Impacts of VMS on Traffic Performance Measures in An Urban Area in Indonesia A. Caroline Sutandi
Civil Engineering Dimension Vol. 10 No. 1 (2008): MARCH 2008
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (185.691 KB) | DOI: 10.9744/ced.10.1.pp. 28-34

Abstract

Variable Message Sign (VMS) is especially recommended for congested flow conditions. The aim of this study is to investigate how drivers in a large city in a developing country with many specific geometric and traffic conditions and also specific driver behaviour, use VMS in aid of choosing route for their inter-city trips. Furthermore, to explore the impact of the use of the information on increasing traffic performance measures. A case study was carried out in Bandung, Indonesia. Microscopic traffic simulations were used in this study to evaluate traffic performance measures. The results of the evaluation found that VMS has insignificant impact on drivers’ route choice behaviour. The results indicated that drivers in Bandung rely much on their experience of traffic conditions commonly occur in the city and demonstrated that VMS has no significant impact to increase traffic performance, but has better impact on the roads with higher number of alternative roads.
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.

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