| CONSTRUCTION OF A DAM
EMBANKMENT WITH NONSTATIONARY QUEUES |
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|---|---|---|
| Photios G.
Ioannou Civil & Environmental Engineering Department University of Michigan Ann Arbor, Michigan 48109-2125, U.S.A. |
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| ABSTRACT | ||
| This paper presents the simulation model for a project involving the haulage and placement of rip-rap for the construction of a dam to illustrate how traffic-related queues are created at locations determined dynamically at simulation runtime. This example also investigates the formation of moving queues of equipment that cannot pass each and travel together like a procession or a convoy. The solution to this problem is outlined conceptually using the activity-scanning modeling paradigm and is described in detail using a simulation model developed in STROBOSCOPE. | ||
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| APPLICATION OF
SIMULATION IN TRENCHLESS RENEWAL OF UNDERGROUND URBAN INFRASTRUCTURE |
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|---|---|---|
| Jason S.
Lueke Samuel T. Ariaratnam Simaan M. AbouRizk Department of Civil & Environmental Engineering 220 Civil/Electrical Engineering Building University of Alberta Edmonton CANADA T6G 2G7 |
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| ABSTRACT | ||
| Pipe bursting is a type a of trenchless technology that enables the construction, rehabilitation, or replacement of underground urban infrastructure with minimal disruption to surface activity. This construction process facilitates the installation of sewer pipes and gas mains of similar or larger diameters at the same location as existing lines. The upsizing capability is particularly relevant in situations where greater flow capacities are required due to increased urbanization. This paper presents an application of a simulation platform developed at the University of Alberta called Simphony, used to create a special purpose simulation application of the pipe bursting process. Results obtained from this model can assist owners, engineers, contractors, and equipment manufacturers in designing and planning pipe bursting projects. | ||
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| ACTIVITY SCHEDULING IN
THE DYNAMIC, MULTI-PROJECT SETTING: CHOOSING HEURISTICS THROUGH DETERMINISTIC SIMULATION |
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|---|---|---|
| Robert C.
Ash Division of Business and Economics Indiana University Southeast 4201 Grant Line Road New Albany, Indiana 47150, U.S.A. |
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| ABSTRACT | ||
| Tools for project scheduling, such as Gantt charts and PERT/CPM networks, have existed for some time. However, these tools have significant shortcomings for settings characterized by constrained resources and multiple projects that arrive dynamically. This paper identifies the power and benefit that deterministic simulation can bring to the practice of project management and project scheduling. The paper is intended for those in the daily practice of project management, and those in the field of developing project management software. Deterministic simulation using available project data to choose an activity scheduling heuristic not only allows for the establishment of good project schedules, it determines ahead of time which resources will be assigned to specific project activities. | ||
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| SIMULATION OF STRUCTURAL
STEEL ERECTION PROCESS |
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|---|---|---|
| Anil
Sawhney Del E. Webb School of Construction Arizona State University PO Box 870204 Tempe, Arizona 85287-0204, U.S.A. |
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André
Mund Jennifer Marble 2007 Kohrman Hall, Construction Engineering Western Michigan University Kalamazoo, Michigan 49008-5064, U.S.A. |
| ABSTRACT | ||
| The construction industry's growth and the adoption of newer means, methods, and materials of construction have resulted in an increase in complexity of on-site construction processes. Consequently, the construction industry's need for advanced tools and techniques to study, plan, and manage these complex construction processes has developed. This paper illustrates a Petri Net based hierarchical and modular modeling and analysis technique that can be used for simulation of complex construction processes. Through the use of hierarchy, modularity, and resource modeling, Petri Nets provide clear advantages in the modeling of complex construction processes. This paper highlights the advanced features of Petri Nets and their utilization in the modeling and analysis of a structural steel erection process. | ||
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| SPECIAL PURPOSE
SIMULATION TEMPLATE FOR UTILITY TUNNEL CONSTRUCTION
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|---|---|---|
| Simaan M.
AbouRizk Janaka Y. Ruwanpura Department of Civil and Environmental Engineering, 220 Civil/Electrical Engineering Building University of Alberta Edmonton AB CANADA T6G 2G7 |
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K.C. Er Siri Fernando City of Edmonton Asset Management and Public Works Drainage Services, Design and Construction 14323 - 115 Avenue Edmonton AB CANADA T5M 3B8 |
| ABSTRACT | ||
| Utility construction projects have great opportunities for simulation applications in construction. This paper describes the special purpose tunneling simulation template developed based on the tunneling operations performed at the City of Edmonton Public Works Department for shielded tunnel boring machines. The tunneling operations are described, then the tunnel template and its components are illustrated. The results generated from the template using the historical data to test the template and to analyze the potential construction processes are presented. Future embellishments to the tunneling template are briefly described. | ||
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| REAL WORLD APPLICATIONS
OF CONSTRUCTION PROCESS SIMULATION |
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|---|---|---|
| Daniel W.
Halpin Luis-Henrique Martinez Division of Construction Engineering and Management 1294 Civil Engineering Building Purdue University West Lafayette, Indiana 47907-1294 |
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| ABSTRACT | ||
| Construction simulation has been an
academic tool since the 1960's. There are over 20 construction programs in
the U.S. and Canada that offer construction simulation as a course at both
the graduate and undergraduate levels. Although simulation has proved a
valuable teaching tool in the academic setting, use by practicing
professionals has been limited. The construction industry has been
reluctant to consider this tool as a definitive aid for resource
optimization and productivity improvement. This paper presents an example of the successful use of simulation by a large international construction company. The objective of the paper is to better understand what factors have enabled this company to continuously and successfully implement construction simulation on many of its projects. | ||
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| WHO SERVES WHOM?
DYNAMIC RESOURCE MATCHING IN AN ACTIVITY-SCANNING SIMULATION SYSTEM |
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|---|---|---|
| Photios G.
Ioannou Civil & Environmental Engineering Department University of Michigan Ann Arbor, Michigan 48109-2125, U.S.A. |
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Julio C.
Martinez Charles E. Via, Jr. Department of Civil Engineering Virginia Tech Blacksburg, Virginia 24061-0105, U.S.A. |
| ABSTRACT | ||
| This paper presents an activity-scanning simulation model for the familiar barbershop problem where customers have favorites, barbers may not show up for work, and customers may get impatient and leave. This example illustrates the mechanisms for matching customers to barbers or barbers to customers and argues that either approach may be implemented in an activity scanning system without altering the basic model structure. The solution to this problem is described in detail using a simulation model written in STROBOSCOPE. | ||
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| PRODUCT - BASED MODEL
REPRESENTATION FOR INTEGRATING 3D CAD WITH COMPUTER SIMULATION
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|---|---|---|
| Jianfei
Xu Simaan AbouRizk Department of Civil Engineering 220 Civil Electrical Building University of Alberta Edmonton CANADA T6G 2G7 |
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| ABSTRACT | ||
| Computer-Aided Design (CAD) is widely
used during the engineering design stage of construction projects. CAD
generally contains a wealth of information regarding the facility to be
constructed; this information can be effectively used for construction
decision-making. This paper undertakes an investigation of the possibility of using a "product-based" model representation for integrating 3D CAD with computer simulation to facilitate better decision-making during construction. The objective is to conceptualize an environment that allows an engineer to specify how construction of the facility will be carried out with CAD. The environment could then extract relevant information to produce simulation models that will enable better understanding of the construction process, better estimating of cost, and more appropriate planning. | ||
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| TRAVEL-TIME SIMULATION
TO LOCATE AND STAFF TEMPORARY FACILITIES UNDER CHANGING CONSTRUCTION
DEMAND |
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|---|---|---|
| Iris D.
Tommelein Construction Engineering and Management Program Department of Civil and Environmental Engineering University of California Berkeley, CA 94720-1712, U.S.A. |
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| ABSTRACT | ||
| Temporary facilities on construction sites are needed to support the labor force during the course of their work. Rules of thumb traditionally have been used to decide on the location and capacity of those facilities, but the demand for support is project dependent and changes as construction progresses at a rate specific to each trade discipline. This paper presents a more systematic method for facility location and capacity sizing based on travel-time simulation. Actual site circumstances, including the location of a temporary facility relative to the location of the workers as well as workers' needs, travel, and service time are taken into account. The objective is to identify the best location on site for temporary facilities on a project-by-project basis. When real-time data becomes available as construction progresses, it can be incorporated in the model to generate even more realistic output. Tool-room location is used as an illustration. The presented simulation model yields data to assess how much travel and wait time is tolerable compared to the cost of increasing the capacity of the support facility or providing service at additional locations. | ||
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| JAVA-BASED SIMULATION OF
CONSTRUCTION PROCESSES USING SILK |
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|---|---|---|
| Anil
Sawhney Del E. Webb School of Construction Arizona State University PO Box 870204 Tempe, Arizona 85287-0204, U.S.A. |
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Jayachandran
Manickam André Mund Jennifer Marble 2007 Kohrman Hall, Construction Engineering Western Michigan University Kalamazoo, Michigan 49008-5064, U.S.A. |
| ABSTRACT | ||
| The modeling and analysis of construction processes is gaining recognition in the construction industry. Recent developments such as object-oriented modeling, Petri Net-based simulation, and construction project level simulation are being adopted by researchers in the field of construction simulation. This paper describes one such recent development. It highlights the work performed by the authors in using Java for the simulation of construction processes. The methodology used, simulation toolkit adopted, and the construction process simulated is described. | ||
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| Iconic Animation of
Construction Simulation |
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|---|---|---|
| Jonathan Jingsheng
Shi H. Zhang Department of Building and Construction City University of Hong Kong 83 Tat Chee Ave. Kowloon, Hong Kong |
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| ABSTRACT | ||
| This paper presents a continuous research effort the animation function in the development of the Activity-Based Construction (ABC) modeling and simulation system. ABC animation uses the constructed ABC simulation model as the animation background; and pre-created images of simulation entities move around along individual execution paths on the ABC model. A library of icons consisting of common construction entities has been created in the ABC system. To perform animation function in ABC only involves one simple additional task for the user to select an appropriate icon for a simulation entity. | ||
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| SIMPHONY: AN ENVIRONMENT
FOR BUILDING SPECIAL PURPOSE CONSTRUCTION SIMULATION TOOLS
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|---|---|---|
| Dany
Hajjar Simaan AbouRizk Department of Civil Engineering 220 Civil Electrical Building University of Alberta Edmonton CANADA T6G 2G7 |
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| ABSTRACT | ||
| Special Purpose Simulation (SPS) is a proven principle that can lead to the effective transfer of simulation knowledge to the construction industry. Three separate industry experiments have led to the identification of a set of requirements that construction SPS tools should adhere to in order to be successful. This set of requirements was then used in the implementation of a computer system called Simphony. The system greatly simplifies the SPS tool development process and standardizes the simulation, modeling, analysis and integration features of such tools. The result is a complete environment that tailors to the needs of both novice and advanced simulation tool developers and users. | ||
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| A CASE STUDY IN THE
QUANTIFICATION OF A CHANGE IN THE CONDITIONS OF A HIGHWAY CONSTRUCTION
OPERATION |
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|---|---|---|
| Haldun
Cor Julio C. Martinez Via Department of Civil Engineering Virginia Tech Blacksburg, Virginia 24061-0105, U.S.A. |
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| ABSTRACT | ||
| Changes in the conditions under which construction operations take place disrupt projects and can have severe construction cost impacts that must be quantified. This paper presents a case study in which discrete event simulation was used to quantify the impacts of a change in a highway construction project. | ||
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| DEFINING A bETA
DISTRIBUTION FUNCTION FOR CONSTRUCTION SIMULATION
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|---|---|---|
| Javier
Fente Kraig Knutson Cliff Schexnayder Del E. Webb School of Construction Arizona State University PO Box 870204 Tempe, AZ 85287-0204, U.S.A. |
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| ABSTRACT | ||
| In most applications of simulation to construction, the underlying Probability Distribution Function (PDF) is generally unknown. Consequently, an expert will have to select a PDF hoping that the one that is chosen matches the shape of the underlying distribution. This research attempts to quantify, through a sensitivity analysis, the effect of subjective information in choosing parameters for a Beta distribution to be used in earthmoving simulation models. | ||
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| DEVELOPING THE
STATISTICAL PARAMETERS FOR SIMULTANEOUS VARIATION IN FINAL PAYLOAD AND
TOTAL LOAD TIME |
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|---|---|---|
| Govindan
Kannan Michael C. Vorster Julio C. Martinez Charles E Via Jr. Department of Civil Engineering Virginia Tech Blacksburg, VA 24061-0105, USA |
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| ABSTRACT | ||
| It is argued that the two principal components of simulating earthmoving operations are modeling and providing input data. The knowledge and proficiency in modeling has been substantially improved through general purpose simulation systems such as CYCLONE and STROBOSCOPE. However, the inability to provide statistically reliable input data to the models is source of concern. Automated data collection through instrumented vehicles provides the first opportunity to collect cycle time data in a continuous manner and hence, provide a statistically-reliable data set. This paper presents the use of automated data to fit probabilistic distributions that are used as input to simulation models. This paper also describes a methodology to develop statistical parameters for simultaneous variation in payload and load time through the concept of a payload time (PLT) Map. Field data from on-going earthmoving projects is used to illustrate these concepts. | ||
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