问题 问答题

用于风荷载计算和波浪推算设计风速标准分别是什么?

答案

参考答案:

风速的取值常用在一定时间间隔内的平均值来代表,该指定的时间间隔称为时距。在我国的工程设计中,常用的时距有10min和2min两种,相应的风速分别称为时距10min的平均风速U10的时距2min的平均风速,前者用于风荷载计算,后者用于波浪推算。

完形填空
完型填空
A:   1   , Jim!There is a big bag    2  the tree.
B: What's   3   it?
A: I don't know.I   4   there are some books.
B:   5  , I think   6   a football.
A: Let's go and    7   it.
B: Ah,there are   8   and a football.
A: Oh,there is a name on the bag David Smith.
B: It's    9   Let's find him   10   give him the bag.
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( ) 8. A some flower    
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