Artificial neural network based designs of prestressed concrete and composite structures This book introduces artificial neural network based Lagrange optimization techniques for structural design in prestressed concrete based on Eurocode 2 and composite structures based on American Institute of Steel Construction and American Concrete Institute standards. ANN based design charts show how to use the Lagrange multiplier method to optimize multi objective functions for the design of a post tensioned beam composite columns encasing H shaped steel sections subjected to biaxial loads composite beams and the concrete and reinforcing steel portions of a composite structure. Robust design charts for both prestressed concrete and composite structures are also provided