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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 8 Documents
Search results for , issue "Vol. 16 No. 1 (2014): MARCH 2014" : 8 Documents clear
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.
Prediction of Missing Streamflow Data using Principle of Information Entropy Santosa, B.; Legono, D.; , Suharyanto
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 (389.975 KB) | DOI: 10.9744/ced.16.1.40-45

Abstract

Incomplete (missing) of streamflow data often occurs. This can be caused by a not continous data recording or poor storage. In this study, missing consecutive streamflow data are predicted using the principle of information entropy. Predictions are performed ​​using the complete monthly streamflow information from the nearby river. Data on average monthly streamflow used as a simulation sample are taken from observation stations Katulampa, Batubeulah, and Genteng, which are the Ciliwung Cisadane river areas upstream. The simulated prediction of missing streamflow data in 2002 and 2003 at Katulampa Station are based on information from Genteng Station, and Batubeulah Station. The mean absolute error (MAE) average obtained was 0,20 and 0,21 in 2002 and the MAE average in 2003 was 0,12 and 0,16. Based on the value of the error and pattern of filled gaps, this method has the potential to be developed further.
Analyses of Steel Bridge Circular Columns using Fiber Model considering Local Buckling Kinoshita, K.
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 (535.542 KB) | DOI: 10.9744/ced.16.1.1-7

Abstract

One of the most concerned problems for analytical estimation of ultimate strength and ductility of steel bridge columns is the consideration of local buckling. Stress-strain curves with softening behavior to include local buckling in fiber model analysis method were proposed by several researchers. However, accuracy of those models is still relatively low. As a consequence, most steel bridge designs have been done using fiber model analysis method without consideration of local buckling. In order to improve the analytical response estimation of steel bridge columns, a fiber model analysis method considering local buckling is proposed in this study. In this method, multi-fiber elements were used to model the local buckling length to simulate local buckling deformation. The proposed method shows good results not only for estimating peak strength but also post-peak strength compared to previous experimental results. However, further research should be directed to improve the accuracy of the deformation modes.
Trust to Contractor in Housing Construction Chandra, H.P.; Limanto, S.
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 (463.535 KB) | DOI: 10.9744/ced.16.1.46-53

Abstract

Trust is the willingness to rely upon the actions of others, to be dependent upon them, and thus to be vulnerable to their actions. In housing construction, where contract is usually  awarded without tender, trust of the developer to the contractor is a very important factor. This paper studies trust relationship, specifically on the developer’s side to contractor. Trust is measured by identifying three major factors: characteristics, how to build, and the benefits of trust. Fifteen respondents from fifteen housing developers in West Surabaya, Indonesia, participated in the questionnaire survey. The results indicated that characteristics of trust depend on the credibility of the contractor, which is the depth of its experience. Trust can be built by creating team compatibility and aligning issues; and behaving professionally. Trust can help the contractor accelerate  in solving the problem in construction.
SWOT Analysis of Housing Co-operatives in South Africa Jimoh, R.A.; Van Wyk, J.J.
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 (181.725 KB) | DOI: 10.9744/ced.16.1.54-60

Abstract

While South Africa has the necessary legislative and policy frameworks in housing and other sectors that could have contributed to the development of co-operative housing approach, little is done to promote it. To that end, this paper provides the SWOT (Strength, Weaknesses, Opportunities and Threats) analysis of 6 housing co-operatives in South Africa. Based on the data generated from the multi-case study conducted and the administration of self addressed questionnaires, a SWOT analysis was done in order to identify the strengths, weaknesses, opportunities and threats to the housing co-operatives, with a view to developing sustainable strategies. Results from the study shows that the housing co-operatives are faced with many threats arising from the external environment and many weaknesses arising from the inadequate internal resources and circumstances. One of the strategies proposed is that there should be formulation and implementation of appropriate policies and legislation beneficial to the housing co-operatives by the government.
Experimental Investigation of the Effects of Reverse Bending and Straightening Process on Carbon Steel Bars used for Civil Engineering Applications Adewole, K. K.; Bull, S. J.
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 (436.114 KB) | DOI: 10.9744/ced.16.1.18-23

Abstract

This paper presents an experimental investigation of the effects of reverse bending and straightening process on the mechanical properties of a typical carbon steel bar used for civil engineering applications. Twenty four specimens each were used for the metallogarphy, microhardness and tensile tests. The investigation revealed that the reverse bending and straightening process has no significant effect on the bars’ through-thickness microstructure and hardness. However, the reverse bending and straightening process reduces the yield load, ultimate load, and displacement at fracture of the bars by 4.27%, 2.58%, and 18.62% respectively. These results highlight the need to take into consideration the effects of the previous loading history of the bars/wires, particularly the reduction in the displacement at fracture and consequently, the ductility of the bars/wires in the design and fitness for purpose assessment of components made from them, since the bars/wires could experience high strain during installation and in service due to overloads.
Design Aspect of including Infill Wall in RC Frame Design* Sukrawa, M.
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 (1142.884 KB) | DOI: 10.9744/ced.16.1.24-32

Abstract

This study compares analysis and design of a four story reinforced concrete (RC) frame structure with infill wall at upper levels and open at basement level. For the analysis, the RC frame are modeled as open frame (MOF) and infilled-frames using six compression only cross diagonal strut (MIF-Strut), and infilled frame using shell elements (MIF-Shell). Another model, MIF-Full, is created by adding walls at basement level of the MIF-Strut to study the effect of wall discontinuity. All three dimensional models are loaded with gravity load and quake load appropriate for South Bali region. Results show that the infilled-frame models are 4.8 times stiffer than MOF in the wall direction. Perpendicular to the wall, however, the stiffness increase is 29%. Soft storey mechanism exists in the absence of wall at basement level, regardless of reasonable column dimensions.
Effect of Rigidity of Plinth Beam on Soil Interaction of Modeled Building Frame Supported on Pile Groups Ravi Kumar Reddy, C.; Gunneswara Rao, T.D.
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 (1682.051 KB) | DOI: 10.9744/ced.16.1.8-17

Abstract

This paper presents the effect of rigidity of plinth beam on a model building frame supported by pile groups embedded in cohesionless soil (sand) through the results of static vertical load tests. The effect of rigidity of plinth beam on displacements and rotation at the column base and also shears and bending moments in the building frame were investigated. In the analytical model, soil nonlinearity in the axial direction is characterized by nonlinear vertical springs along the length of the pile (t-z curves) and at the tip of the pile (Q-z curves) while in the lateral direction by the p-y curves. Results revealed that, shear force and bending moment values which were back calculated from the experimental results, showed considerable reduction with the reduction of the rigidity of the plinth beam. The response of the frame from the experimental results is in good agreement with that obtained by the nonlinear finite element analysis.

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