Mass and topology optimization of tensegrity structures with application to footbridges

This paper underlines the need of improving the traditional design method of stem rope footbridge by a sustainable reliable optimization design method of tensegrity footbridge. The proposed methodology displays the optimization of the topology of elements and of the structure, the specified loading and unloading procedures, and the system practical behaviour with respect to construction norms through the obtained multivariate objective function. Since tensegrity systems are characterized by geometric nonlinearity and larger displacements, a specific software program was developed using MATLAB build-in optimization codes. The developed combine mass and topology optimization procedure results in improved geometric and mechanical behaviour. Discussions are presently going on with involved local administration and with different national economical actors to financially foster the project feasibility.