电子数字计算机具有计算精度高、速度快等优点,因此,在现代工程的各个领域中,甚至在一些非计算性运算的逻辑操作领域中,都已得到了广泛的应用。在桥梁设计中也是如此。现代钢桥大多采用超静定结构,计算的工作量大。以前在设计南京庆江大桥正桥钢桁梁时,采用手摇计算机计算,包括主桁内力、主桁挠度及支座水平位移等的计算,需要几十人,花半年的时间。如计算发生差错,还会引起返工,甚至全部重算。因此计算工作十分紧张,计算工作量占全部设计 Electronic digital computer has the advantages of high precision and high speed. Therefore, it has been widely used in all fields of modern engineering, even in the field of logical operation of some non-computational operations. The same is true in bridge design. Most modern steel bridge using statically indeterminate structure, calculation of the workload. In the past, when designing the steel truss girder of Nanjing Qingjiang Bridge, it was calculated by hand computer, including the calculation of the internal force of the main girder, the deflection of the main girder and the horizontal displacement of the bearing. It took dozens of people to spend half a year. If the calculation of errors, but also cause rework, or even recalculate. Therefore, the calculation work is very tight, accounting for the total workload of the design