【摘要】 本文介绍了直接利用前进分析确定斜拉桥施工初始索力的方法。该方法以施工正序进行分析，能够精确计及结构的几何非线性、混凝土收缩徐变以及其他因素的影响。与以往随方法相比，该方法考虑因素全面，计算简使、精度高。用该方法获得的施工初始索力进行施工，成桥索力及线型易于保证，可以大大减少工程控制的工作量，节约大量人力、物力和财力。更多还原

【Abstract】 This apaer is concerned with the deermination of the initial cable forces of cable stayed bridges. A forward-analysis method is introduced , in which the actural construction process is considered . The influences of geometric nonlinearity , shrinkage and creep of concrete are taken into account. It is shown that the method is more comprehensive , easier and more accurate than previous methods . With the initial cable forec determined by the present method , the final cable force and shape can be determined easily . Consequently ,the workload of construction control human ,material and financial resources are reduced substantially . A program based on the method is devloped The P-K cable-stayed bridge of America has been analyzed .更多还原