目前国内外关于预应力混凝土箱形梁扭转和畸变计算虽都从弹性薄壁结构出发,但计算方法不下十余种,且立论互异,繁简不同,结果亦颇有出入。而有些所谓精密法,虽可用电子计算机计算,但不易对梁的工作性能获得明确的物理概念,对于参数分析与方案选择亦不易有所裨益。在国内,预应力混凝土铁路箱形梁所采用的扭转和畸变计算方法有广义坐标法和板件法。前者是以 At present, although the calculation of torsion and distortion of prestressed concrete box girders starts from the elastic thin-walled structure, the calculation method is no less than ten, and the results are also quite different from each other. However, some so-called precision methods can be calculated by using electronic computers. However, it is not easy to obtain a clear physical concept of the working performance of a beam, and it is not easy to benefit the parameter analysis and program selection. In China, the calculation methods of torsion and distortion used in prestressed concrete box girder include generalized coordinate method and plate method. The former is based on