A Hybrid Simulation-Based Optimization Framework For Managing Modular Bridge Construction Projects: A Cable-Stayed Bridge Case Study

Generally, bridge construction is one of the most complex structures in the construction industry due to the higher scalability and supply chain complexity. The modular bridge construction (MBC) technique is considered more advantageous in providing higher productivity, shorter schedules, and better quality. Current practices in managing MBC projects overlook dynamic behaviors among the relevant stakeholders and the interactions among various interacting systems, including manufacturing, logistics, and onsite assembly. To this end, this paper proposes a simulation-optimization framework to enhance MBC project planning. The simulation module comprises discrete event simulation and agent-based modeling to model the interconnected behaviors of the MBC systems. The optimization module aims to improve the key performance indicators (KPIs) of MBC projects, including project cost, schedule, and sustainability. The proposed framework is validated by introducing an MBC case of a cable-stayed bridge. The generated solutions by the optimization model show possible significant enhancements in the identified KPIs.