The simplest type of span is a beam bridge, consisting of a rigid beam between tow supports.
最简单的桥梁是梁桥，由钢性梁和两端的两个支柱构成。
The result of analysis show that there is more yield hinges on the top tow storey columns of 6-storey frame7. It means that the heavy vertical load go against to the beam hinges mechanism of frame.
分析结果表明，7度区六层框架上部两层柱子出铰随竖向荷载的增大而增多，竖向荷载的增大更不利于梁铰机制的形成。
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