A graphical-based method for transient evaluation of construction operations

Rong-Yau Huang, Purdue University

Abstract

This research utilizes computer simulation techniques and develops a graphical method, DISCO (Dynamic Interface for Simulation of Construction Operations), for the evaluation of the transient effects of construction operations. This method employs a CYCLONE abstract model diagram of a system as the modeling framework and dynamically displays on the computer screen the associated simulation variables during the simulation run-time. System dynamics are better understood by monitoring the continuously updated information shown on the screen. Throughout this study, cumulative system productivity is used as a measurement for the evaluation of the transiency of construction operations. The scope of the study, however, focuses mainly on the transient effects caused by the start-up development of construction operations every day. The DISCO program and several intuitive stopping rules are used for determining the state of an operation at the end of a working day. The same state is then used as the start state for the operation of the next day. Transient effects of an operation resulting from the start-up development can then be assessed by analyzing the cumulative system productivity. A pseudo process is used for the preliminary investigation of the transient effect. Three construction operations (namely, an earth-moving, a material hoist, and an asphalt paving operations) are then employed as case studies. Results of the studies are discussed and the findings are presented. Limitations of this study and possible future research directions are also pointed out. Appendices include the determined daily start state for the pseudo process as well as the three construction operations, the simulation output of cumulative productivity, and the source code of the DISCO main program.

Degree

Ph.D.

Advisors

Halpin, Purdue University.

Subject Area

Civil engineering

COinS