【Abstract】 In this paper, the optimal design of prestressed structures is considered in the two following problems: Problem 1 Find the optimal prcstrcssing forces {T} such that the loading capacity of a given Structure is raised to a maximum with the constraints of stresses, displacements and the upper bound of prestressing forces. The member Sizes (cross-sectional areas) {A} arc fixed in the given structure. Problem 2 Find thc optimal member sizes {A} and the optimal prestressing forces {T} of a structure under given loading conditions such that the weight of Structure is minimum with the constraints of Stresses, displacements and member sizes. The problem 1 is solved by linear programming. The probleni 2 has been reduced to a sequence of problem 1 in using the concepts similar to that of Full Stressed Design. Several numerical applications show that the iteration process is rapidly convergent.更多还原