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引用“zhc091”关于《请教MIDAS建模是的边界条件问题》
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yojeans.向
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May 29, 2006, 3:02:38 AM
5/29/06
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急!请教江老师和各位高手,我用MIDAS建了个悬臂施工的刚构桥,请问在两端的现浇段用什么样的边界?MIDAS里面有单向支座吗?谢谢不吝赐教!
yojeans.向
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May 29, 2006, 3:03:23 AM
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引用“江安”:
现浇段一般用简支或连续的边界,也就是在没有合拢前,其中一个节点用DXDYDZRX,其余节点用DYDZ,合拢后要将DXRX钝化。
以上用的是支承的方式,也可以用单向支座,请用弹性连接中的“只受压”,如果不考虑支架的变形,可将SDx设成10e9
tonf/m。值得注意的是,如果设成了很多的单向支座,在合拢前,还得加一个临时的约束,否则,现浇段在模型上是机动的!
yojeans.向
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May 29, 2006, 3:03:49 AM
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引用“zhc091”:
再请问哈,“如果设成了很多的单向支座,在合拢前,还得加一个临时的约束,否则,现浇段在模型上是机动的!”怎么加
临时的约束
啊?我加了单向支座,好象没什么用啊,最后它还是垮了下来哎!
谢谢回复
yojeans.向
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May 29, 2006, 3:04:12 AM
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引用“yojeans”:
模型具体是怎么样一个情况?您可以在悬臂末端节点处添加一个临时的固结支座,在桥梁合拢后再把这个支座敦化掉。
yojeans.向
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May 29, 2006, 3:04:35 AM
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引用“zhc091”:
我试了好多种情况啊,不知道该怎么办了,!我把模型发一个,麻烦您帮我看看,谢谢了;再请问加单向支座怎么加啊,弹性连接得两个点啊,是不是要重新建几个杆单元啊?
yojeans.向
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May 29, 2006, 3:05:06 AM
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引用“薛俊强”:
现浇段取一点人为的加一个顺桥向约束.以固定模型.谢谢您的支持
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