Recent design trends in tall buildings pose new challenges to structural designers, in addition to the traditional requirements for strength, stiffness, ductility and system efficiency. Ever increasing heights and complexity of form, need for robustness coupled to an economy, awareness of limited material resources and sustainability, are all new demanding questions to be tackled with fresh approaches, novel structural systems, and open minds. Structural configurations best addressing the traditional requirements of strength and stiffness for tall buildings are the ones employing the tube concept, whose efficiency is strictly related to the involved shear resisting mechanism, and in fact the historical evolution of the tube concept has been marked by the attempts of reducing the occurrence of efficiency loss due to shear deformations. In this paper, the structural behavior of innovative structural solutions for tube structure is discussed, studying the peculiar behavior of each analyzed geometry, proposing new design approaches and evaluating the related structural efficiency.