基于不变形预张力的基本概念，建立了斜拉桥成桥状态的多目标、多约束的优化模型，并通过有限元程序求解成桥索力。
Based on the basic concept of the un-deformed pretension of cable, the optimization model of finished state with multi-objective and multi-constraint is used.
另外，本文还简单介绍了斜拉桥成桥后的索力调整的影响距阵法和拉索的自重垂度对索力的影响。
Besides, the paper simply introduces the influence matrix method of the adjustment of cable forces after construction and the droops affections for cable forces.
论述了斜拉桥成桥后索力调整的意义和作用。
Significance and functions of the cable force adjustment are discussed.
文章提出了一种简便的计算影响矩阵的方法，可以方便地进行斜拉桥成桥恒载索力优化。
An efficient computational method of the influence matrix is proposed for cable force optimization so as to calculate the cable force of cable-stayed Bridges under dead loads easily.
斜拉索的索力合理与否直接决定了斜拉桥施工阶段结构的受力安全和成桥后结构内力的合理分布。
Rational cable force can guarantee the structure safety in construction and make the structure's internal force reasonable after construction.
自锚式悬索桥理想状态的成桥吊索力，可借用斜拉桥中常用的几种索力优化方法进行研究。
The rational cable force of self-anchored suspension bridge can be researched by the methods being used in optimizing the cable force of cable-stayed bridge.
再以此索力作为正装计算的控制张拉索力，通过正装计算得到一个成桥状态。
Then the forward calculation is also used to get the tensile cable forces of the construction process to gain a finished bridge state under the control of the former forces.
斜拉桥时 ，确定成桥恒载初始索力值是一项重要而困难的任务 ，为此尝试用遗传算法来确定不同目标状态下的斜拉桥初始索力 。
Then trial method based on the forward analysis is used to determine the initial cable force of Xinyan cable-stayed bridge in the paper.
斜拉桥时 ，确定成桥恒载初始索力值是一项重要而困难的任务 ，为此尝试用遗传算法来确定不同目标状态下的斜拉桥初始索力 。
Then trial method based on the forward analysis is used to determine the initial cable force of Xinyan cable-stayed bridge in the paper.
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