On the basis of a brief review of aluminum alloy bridges decks,the concept model of aluminum alloy bridge deck was obtained with the topologic optimization technology of ANSYS.Considering the strength and the stiffness required and the extrusion production capacity of the aluminum alloy decks,two kinds of aluminum alloy decks were designed and the detailed sizes of the two kinds of aluminum alloy decks were optimized.The results have shown that the stiffness of aluminum alloy decks obtained with the topolog...