摘要
本文主要对预应力钢箱梁进行了振动理论分析。主要内容包括三个方面：预应
力钢结构的国内外现状、水平、和发展趋势以及经济建设的要求，预应力钢箱梁的
振动理论分析，以及理论计算值和实验值的比较。
通过研究国内外大量的文献资料，回顾预应力钢结构的发展进程及其在基础建
设中日益突出的地位，进而总结出预应力钢箱梁将被广泛应用于桥梁的上部结构。
在进行预应力钢箱梁的动力分析时，采用了具有分布参数的体系和有限段两种方法，
用以确定梁的自振频率和振型，并用有限段方法编写了程序。最后，用钢箱索梁模
型试验的测试结果验证本文的理论计算值，分析结果是比较吻合的。
The paper mainly analyses the prestressed steel box girder.
It?s major content includes three aspects: civil and foreign
situation, level, developing trend and demand of economic
construction of prestressed steel box girder; dynamic force
analysis of prestressed steel box girder and engineering practical
example.
By studying a great deal of civil and foreign literature
material and reviewing the developing process of prestressed steel
structure and its increasingly dominant status in the foundation
construction, the paper generalizes that prestressed steel box
girder will be used abroad in the super structure of bridge, while
adapts distributing parameter system and finite element method when
the dynamic force analysis of prestressed steel box girder is done,
in order to fix on the free vibration frequency and vibration form
of girder. Finally, the paper compares the test result of model
experiment with the calculating result of the paper, they inosculate
well each other.
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