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预应力混凝土构件的设计是个较复杂的过程,它涉及到多种如荷条件、材料时效性能、极限强度和使用范围的综合研究.所以许多研究者和设计人员为提出一种更有效的设计程序已作了巨大的努力,在此程序中优化的标准是最小成本或最轻重量.通常要求根据假定的临界设计条件估计一个最小截面.对一个试用截面,先找出最小的必须预应力,然后再用截面和内力去研究其它的设计要求.反复迭代到最后的解并非所有条件都能满足,则所求的解不一定是最优的.
The design of prestressed concrete members is a complex process involving a variety of researches such as loading conditions, material aging performance, ultimate strength and application range. Therefore, many researchers and designers propose a more effective design procedure. Significant effort has been made to optimize the standard in this procedure to be the minimum cost or the lightest weight. It is usually required to estimate a minimum cross section based on the assumed critical design conditions. For a trial cross section, first find the minimum required prestress, and then Then cross-sections and internal forces are used to study other design requirements. Iterative iterations to the final solution may not be satisfied by all conditions, and the solution sought may not be optimal.