Bridge_Sim: framework for planning and optimizing bridge deck construction using computer simulation

This paper presents a framework (named Bridge_Sim) that aids contractors in planning bridge deck construction using computer simulation. The proposed framework estimates the time and cost required for construction of bridges' decks. Seven construction methods are included in the proposed framework. These are: cast-in-place on falsework, steel bridge construction, cantilever carriage, pre-cast balanced cantilever, deck pushing, stepping formwork, and launching girder method. The framework estimates total duration and cost for each zone along with its sub-zones, taking into account uncertainties inherited in tasks duration by allowing utilization probability density functions. It allows defining different options and ranges of parameters that influence the duration and total cost associated with launching girder construction method to carry out optimization analysis utilizing Ant Colony optimization. A numerical example is presented to demonstrate the practical features of Bridge_Sim.