• Title/Summary/Keyword: Construction Time

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Forecasting of building construction cost variation using BCCI and it's application (건축공사비지수를 이용한 건설물가 변동분석 및 공사비 실적자료 활용방안 연구)

  • Cho Hun Hee;Kang Kyung In;Kim Chang Duk;Cho moon Young
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • autumn
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    • pp.64-71
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    • 2002
  • This research developed construction cost forecasting model using Building Construction Cost Index, time series analysis and Artificial Neural Networks. By this model, we could calculate the forecasted values of construction cost precisely and efficiently. And we also could find out that the standard deviation of forecasted values is 0.375 and it is a very exact result, so the standard deviation is just 0.33 percent of 112.28, the average of Building Construction Cost Index. And it show more exact forecasting result in comparison with Time Series Analysis.

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FEASIBILITY OF A RFID-BASED MONITORING SYSTEM FOR THE CONCRETE POUR PROCESS

  • S. W. Moon;S. M. Hong
    • International conference on construction engineering and project management
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    • 2007.03a
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    • pp.433-439
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    • 2007
  • A ubiquitous environment in construction requires integrating hardware and software systems. Currently the Construction System Integration Lab (CSIL) at Pusan National University is currently studying the application of ubiquitous technology for better communication in the construction process. In this paper, a pilot of Ubiquitous Concrete Pour System (u-CPS) has been presented to demonstrate the effectiveness of data exchange in the concrete pour process. The u-CPS environment takes advantage of the RFID technology for collecting construction data. The pilot can automatically generate the data for concrete pour work such as departure time, arrival time, concrete pour time. Construction managers can keep track of the progress of concrete pour work using the information. A case study was done for a building construction using the pilot system, the result of which demonstrated that the RFID-base system can help improve the effectiveness of data communication during the concrete pour process.

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ANALYSIS OF THE PROCESS OF FABRICATION OF STEEL STRUCTURES USING AN AUTOMATIC CONSTRUCTION SYSTEM

  • Hak-Ju Lee;Yoonseok Shin;Wi Sung Yoo;Hunhee Cho;Kyung-In Kang
    • International conference on construction engineering and project management
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    • 2009.05a
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    • pp.1081-1087
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    • 2009
  • An automatic construction system in Korea is now at the stage of the full automation like in Japan, and an actual pilot project is going to be built in 2009. However, in developing a new construction system that has never been implemented before, there is a need to assess the performance and to consider the uncertainty of the system. The program evaluation and review technique (PERT) allows dealing with this uncertainty. Thus, this paper implements an analysis of the process of steel fabrication and makes suggestions for time-related problems arising from the analysis. The time required for steel erection by the automatic system was compared with that in the traditional method. In the result, finding out another construction process and improving robot performance were proposed to resolve the problems. The results will contribute to promoting the development of an efficient system for the new automatic construction system.

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Effects of soil-structure interaction on construction stage analysis of highway bridges

  • Ates, Sevket;Atmaca, Barbaros;Yildirim, Erdal;Demiroz, Nurcan Asci
    • Computers and Concrete
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    • v.12 no.2
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    • pp.169-186
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    • 2013
  • The aim of this paper is to determine the effect of soil-structure interaction and time dependent material properties on behavior of concrete box-girder highway bridges. Two different finite element analyses, one stage and construction stage, have been carried out on Komurhan Bridge between Elazi$\breve{g}$ and Malatya province of Turkey, over Fırat River. The one stage analysis assume that structure was built in a second and material properties of structure not change under different loads and site conditions during time. However, construction stage analysis considers that construction time and time dependent material properties. The main and side spans of bridge are 135 m and 76 m, respectively. The bridge had been constructed in 3 years between 1983 and 1986 by balanced cantilever construction method. The parameters of soil-structure interaction (SSI), time dependent material properties and construction method are taken into consideration in the construction stage analysis while SSI is single parameter taking into consideration in the one stage analysis. The 3D finite element model of bridge is created the commercial program of SAP2000. Time dependent material properties are elasticity modulus, creep and shrinkage for concrete and relaxation for steel. Soft, medium, and firm soils are selected for evaluating SSI in both analyses. The results of two different finite element analyses are compared with each other. It is seen that both construction stage and SSI have a remarkable effect on the structural behavior of the bridge.

AUTOMATED CONSTRUCTION PLANNING AND VISUALIZATION

  • M. Kataoka
    • International conference on construction engineering and project management
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    • 2007.03a
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    • pp.61-68
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    • 2007
  • There has been a lot of research on and release of commercial systems that enable evaluation and visualization of construction methods. These have enabled the selection of good construction plans. However, the process in which engineers build 3D geometry, formulate a schedule and eventually synchronize them is still a time-consuming process. Changing any aspect of the geometry or the schedule and re-linking them is also time-consuming. Therefore, the engineers may compromise on getting the best solution. This paper describes a technique to automate the generation of multiple sets of schedules, quantity takeoffs and 4D visualization from a single 3D model.

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A TIME DETERMINATION MODEL INCORPORATING RISK MANAGEMENT BASED ON MALAYSIAN CASE STUDIES

  • Sim Nee Ting;Chung Thing Chong
    • International conference on construction engineering and project management
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    • 2009.05a
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    • pp.642-648
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    • 2009
  • Determining the total duration for a construction project is an integral part of project management in the construction industry. This is to ensure the project and all its associated activities can be carried out and completed within the time frame stipulated. There are several commonly used scheduling methods and techniques in project management, some of which involves manual calculation while others involve computer software. This paper looks into the various time determination methods, extracting out their differences and similarities. It also seeks to draw out the problems when determining time for projects, especially those encountered of case studies. Based on the results from the case studies, there were delays on certain projects even though time determination had been carried out rigorously prior to the commencement of the projects. This paper seeks to develop a time determination model, which incorporates risk management techniques into the calculations in order to improve the method for time estimation to minimize the chances of project delay.

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A REAL-TIME PMIS BASED INDUSTRIAL CONSTRUCTION PROJECT MANAGEMENT SYSTEM

  • Kyusung Lee;Hojeong Song;Jaehyun Choi
    • International conference on construction engineering and project management
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    • 2013.01a
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    • pp.352-358
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    • 2013
  • As amount of information in construction industry is growing, the role of information system in project management is becoming increasingly important. With the emerging IT application to the advancing construction industry, construction project management system with advanced technology has been progressed vigorously to improve construction productivity and management efficiency. Recently, a web-based Project Management Information System (PMIS) is developed to support decision-making process by efficiently managing project related information generated from various discipline. Many firms are in the process of developing the PMIS system or already have been applied the system to various projects. However, PMIS is still in its early stage of development to be applied at industrial plant construction projects that process management is significantly emphasized for the successful execution of the project. With the complexity of the industrial plant projects, the industry practitioners need to be able to visualize the construction schedule information to manage the project efficiently. This study suggests methodologies for improving PMIS specialized for industrial plant piping construction projects to estimate the baseline schedule and performance measurement more accurately by developing a framework for the piping construction projects. By using this developed system, the researchers expect that piping construction projects will be more efficiently managed on a real-time basis through measuring progress of piping at each and every state of progress milestone and provide management with opportunities to forecast the level of efforts required to execute the remaining work scope in a timely manner

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Work Time Analysis of Rebar Fabrication Method in Beam Construction. (보 철근공사 조립공법별 작업시간분석)

  • Kim, Ju-Yong;Kim, Min-Ku;Kim, Young-Kil;Kim, Gwang-Hee
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2019.11a
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    • pp.8-9
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    • 2019
  • The rebar work is a labor intensive construction work with a high labor cost ratio. It is difficult to manage the productivity, construction time, and safety of rebar work. The problem of productivity decreased in rebar construction is due to a lack of workers according to the aged workers. Partial prefabrication rebar can be an alternative solution to productivity decreased in rebar work. The characteristic of partial prefabrication method is that time consuming component such as stirrup of beam assemble in factory and others assemble in site. Therefore, in this study, the time required for each rebar assembly method is measured and analyzed to confirm the possibility of productivity improvement.

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Factors That Affect Project Time and Cost Performance during Highway Construction Using Incentive/Disincentive Provisions

  • Pyeon, Jae-Ho;Park, Moonseo;Jung, Sangsun;Park, Taeho
    • Land and Housing Review
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    • v.11 no.4
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    • pp.115-124
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    • 2020
  • Incentive/Disincentive (I/D) contract is designed for minimizing any disruption of traffic flow in road construction projects. I/D contracting projects have been evaluated with regard to time and cost performance in various states, more than 35 states. However, construction project managers and planners have little understanding of the project factors that affect the project time and cost performance of highway construction projects using I/D regulations. Therefore, the purpose of this research is to find factors that affect I/D project success or failure to improve the decision-making process for the implementation of I/D projects. In order to achieve the objectives of this research, the researchers collected I/D road construction project data from FDOT and performed evaluation for each collected project. Then, project data analysis to identify key factors that affect I/D project performance was performed. In conclusion, five significant factors for project time performance and six significant factors for project cost perfornace were identified and summarized.

Time Dependent Analysis Considering the Construction Sequences in Bridges of Movable Scaffolding System (MSS) (시공단계를 고려한 MSS 공법 교량의 시간의존적 거동해석)

  • Kwak Hyo-Gyoung;Son Je-Kuk
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2005.04a
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    • pp.167-174
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    • 2005
  • Through time-dependent analyses of RC bridges constructed by a movable scaffolding system (MSS) considering the construction sequence and creep deformation of concrete, structural responses related to the member forces are reviewed. On the basis of the compatibility condition and equilibrium equation at every construction stage, basic equations that can describe the moment variation with time in movable scaffolding construction are derived. By using the introduced relations, the design moment and its variation over time can easily be obtained with only the elastic analysis results and without additional time-dependent analyses considering the construction sequences. In addition, the design moments determined by the introduced equations are compared with the results from a rigorous numerical analysis with the objective of establishing the relative efficiencies of the introduced equations.

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