问题 单项选择题

由于高层建筑高度大、层数多,竖向荷载很大。100m左右高的建筑,底部单柱竖向轴力往往达( )kN。

A.5000~10000

B.10000~20000

C.10000~30000

D.20000~50000

答案

参考答案:C

解析:本题的考点是高层建筑的结构特点。其特点如下。 (1) 高度高。顾名思义,高层建筑的特征在于“高”。对高度大于等于24m的房屋,用传统的砌体结构承重已不适宜,风荷载及地震作用产生的水平力已成为结构设计的重要因素。 (2) 荷载大。由于高层建筑高度大、层数多,竖向荷载很大。100m左右高的建筑,底部单柱竖向轴力往往达10000~30000kN。 (3) 技术要求高。高层建筑体形高耸与荷载大带来的问题是多方面的。在结构计算上,除计算理论的复杂之外,构件的轴向变形研究、动力特性研究以及结构延性、 构造连接等都较之一般建筑结构有特殊要求。

单项选择题
单项选择题

Are you going to high school to go on with your study What will you do if you can’t Don’t worry. Vocational schools are open for you because our country is in need of people with special skills.

Compared with common high schools, vocational schools have more advantages. Firstly, in order to promote the development of vocational education, our country spends a lot of money on it. So you need to pay only a smaller half of the school fee. Secondly, in here you have already started learning practical skills that you can use all your life. But some other students may still worry about how to spend the long three years at high schools. Why Because they didn’t choose the school that suits them. And finally, when they are still wondering where to go, you are already able to live on your own hands proudly. And perhaps it won’t be long before you are on the road to success.

People take different roads because they have different potentials. So different students should choose different schools. Go to high school if you think that you can go farther on that road. Choose a key high school if you are lucky enough to have the chance. Enter a vocational school if you are interested in the lessons there and you are better at making things with your hands.

In a word, think carefully and see what kind of person you are. Remember, always choose things that suit you.

What can we learn from the passage()

A.People should take the same road.

B.Key high school students must be good at making things.

C.Clever students are better at using their hands.

D.We should choose things that suit us.