In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated mo...In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated model of radio-frequency identification (RFID) and four-dimensional Computer-Aided Design (4D CAD) in construction management. RFID involves the use of tags that collect data and transmit data. RFID can collect data by radio waves instead of light waves. RFID technology is surpassing barcode technology where light waves are easily blocked and barcode labels are easy to fall off or become unreadable due to dust, dirt, or other contaminants. 4D CAD which involves 3D construction models and construction schedules presents visualized construction process. Integration of RFID and 4D CAD in this paper built a dynamic construction management and control system which would reduce the time of capturing data on site and control quality of construction materials efficiently. Pilot test result shows that a construction manager can easily understand how and what a complicated construction project will be accomplished. Although further analysis is necessary, RFID and 4D CAD show promises of being a beneficial technology in construction management.展开更多
The paper presents applications of simplified discrete-event simulation (SDESA), and 4D-GCPSU, to the National Stadium of the Beijing 2008 Olympics. Taking into account influential factors, e.g., resource, spatial con...The paper presents applications of simplified discrete-event simulation (SDESA), and 4D-GCPSU, to the National Stadium of the Beijing 2008 Olympics. Taking into account influential factors, e.g., resource, spatial condition, and the randomness of the construction process, the installation process of the steel-structure was simulated and optimized by using genetic algorithm (GA) optimization methodology. The operations simulation shortened the installation duration by 39 days (about 16% of the original total duration), guided the manufacturers to plan the construction processes, and provided specific suggestions on the entry time of the installation components, resulting in resource allocation optimization, resource saving, and construction efficiency improvement. Combining with the optimized schedule, the 4D visualization environment can discover time-space conflicts timely, and may assist project managers to reschedule the construction activities in tune with the site layout and resource allocation.展开更多
To fully understand and effectively implement 4D building information modelling(BIM)models and methods,we need to develop a precise knowledge of which project digital documents should be used and how they influence th...To fully understand and effectively implement 4D building information modelling(BIM)models and methods,we need to develop a precise knowledge of which project digital documents should be used and how they influence the decision-making(DM)process.This article studies the convergence between uses of 4D BIM and digital project documents.We hypothesize that a clear visualization of the construction simulation through a 4D model is a useful source of information and a support for DM at collaborative meetings.Through this research,we continue to progress toward a new 4D-based collective decision device,so these elements will contribute to propose 4D BIM as DM support on architecture engineering construction(AEC)projects.Further,the present research will be complemented by results from questionnaires given at a later research stage.The article presents a brief review of BIM context to consider ways of fostering the implementation of all 4D BIM uses(not only visualization).It then introduces a proposition for 4D BIM uses implementation by the project development phase.It concludes by summarizing stakeholders’roles and documents relevant to 4D BIM uses.展开更多
文摘In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated model of radio-frequency identification (RFID) and four-dimensional Computer-Aided Design (4D CAD) in construction management. RFID involves the use of tags that collect data and transmit data. RFID can collect data by radio waves instead of light waves. RFID technology is surpassing barcode technology where light waves are easily blocked and barcode labels are easy to fall off or become unreadable due to dust, dirt, or other contaminants. 4D CAD which involves 3D construction models and construction schedules presents visualized construction process. Integration of RFID and 4D CAD in this paper built a dynamic construction management and control system which would reduce the time of capturing data on site and control quality of construction materials efficiently. Pilot test result shows that a construction manager can easily understand how and what a complicated construction project will be accomplished. Although further analysis is necessary, RFID and 4D CAD show promises of being a beneficial technology in construction management.
基金the National Natural Science Foundation of China (No. 50478015) the National Technological Support Program for the 11th-Five-year (No. 2007BAF23B02)
文摘The paper presents applications of simplified discrete-event simulation (SDESA), and 4D-GCPSU, to the National Stadium of the Beijing 2008 Olympics. Taking into account influential factors, e.g., resource, spatial condition, and the randomness of the construction process, the installation process of the steel-structure was simulated and optimized by using genetic algorithm (GA) optimization methodology. The operations simulation shortened the installation duration by 39 days (about 16% of the original total duration), guided the manufacturers to plan the construction processes, and provided specific suggestions on the entry time of the installation components, resulting in resource allocation optimization, resource saving, and construction efficiency improvement. Combining with the optimized schedule, the 4D visualization environment can discover time-space conflicts timely, and may assist project managers to reschedule the construction activities in tune with the site layout and resource allocation.
文摘To fully understand and effectively implement 4D building information modelling(BIM)models and methods,we need to develop a precise knowledge of which project digital documents should be used and how they influence the decision-making(DM)process.This article studies the convergence between uses of 4D BIM and digital project documents.We hypothesize that a clear visualization of the construction simulation through a 4D model is a useful source of information and a support for DM at collaborative meetings.Through this research,we continue to progress toward a new 4D-based collective decision device,so these elements will contribute to propose 4D BIM as DM support on architecture engineering construction(AEC)projects.Further,the present research will be complemented by results from questionnaires given at a later research stage.The article presents a brief review of BIM context to consider ways of fostering the implementation of all 4D BIM uses(not only visualization).It then introduces a proposition for 4D BIM uses implementation by the project development phase.It concludes by summarizing stakeholders’roles and documents relevant to 4D BIM uses.
