Optimization of hanger arrangement in tied arch bridge using genetic algorithm

Abstract

Hanger arrangement has a decisive influence on the mechanical behavior of tied arch bridge. Nielsen system and network system show good results in this respect, but the configuration of them is monotonous, which makes obstacles to the diversity of design. By using genetic algorithm with strong global searching ability, this paper combines ANSYS with MATLAB, and optimizes the hanger arrangement of tied arch bridge to obtain some layout forms of sparse and non-uniform hanger, which have good mechanical performance and varied configuration. Through the comparative analysis, it can be found that several hanger arrangement schemes obtained in this paper are very close to Nielsen system on stiffness. Even some schemes are not second to Nielsen system in the artistic respect, and show greater stiffness and better mechanical behavior. Furthermore, these different otpmized schemes provide more design options.