midas里连续梁桥支座下节点与主墩连接如何模拟？
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如图。节点26,23,21模拟的是支座上节点，节点25,22,20模拟的是支座下节点，桥墩建立时是用的22节点和70节点。单元45是桥墩单元。 第一个问题：我看有的资料上说可以共节点模拟，那这种情况三个支座下节点和桥墩怎么共节点，这个共节点到底是什么意思？第二个问题：还有的资料说可以用刚性连接模拟，又该怎么做？第三个问题：我想了一下，觉得共节点可能是把节点25,20,作为墩单元45里面的节点3，节点4，不知道这样理解对不对。 希望知道的指导一下。图片在这里。上面的不知道为什么看不了
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