Multi-criteria optimization of concrete arch dams

In this study, multi-criteria shape optimization of an asymmetrical doublecurvature arch dam is presented. Simultaneous cost minimization of dam construction and maximum allowable tensile stress are investigated for an economical and safe design approach in the current study. Pareto front method was used to balance both the economy and safety of the design simultaneously, which can be dicult for both analysts anddecision-makers. A non-dominated solution based on the important parameters of dam analysis and design is presented. To help decision-makers in their decision, two diff erent methods are proposed. These methods for the case of an arch dam are Lombardi coecient and equilibrium point methods. The obtained results indicate that these two methods can be helpful for designers without experience and information of previous designs.