问题 单项选择题

有密集建筑群的城市市区中的某房屋,丙类建筑,地上28层,地下1层,为一般钢筋混凝土框架-核心筒高层建筑,抗震设防烈度为7度,该建筑质量沿高度比较均匀,平面为切角三角形,如图所示。设计使用年限为50年。

假定风荷载沿高度呈倒三角形分布,地面处为零,屋顶处风荷载设计值q=134.7kN/m,如图所示,地下室混凝土剪变模量与折算受剪截面面积乘积G0A0=19.76×106kN,地上1层G1A1=17.17×106kN。试问,风荷载在该建筑结构计算模型的嵌固端产生的倾覆力矩设计值(kN·m),与下列何项数值最为接近()

提示:侧向刚度比可近似按楼层等效剪切刚度比计算。

A.260779

B.347706

C.368449

D.389708

答案

参考答案:C

解析:

解答如下:

根据《高层建筑混凝土结构技术规程》附录E.0.1条、5.3.7条:

故应以地下室底板为嵌固端。

=368449.4kN·m

关键是判断结构的嵌固端位置。

完形填空

Once a man and his wife worked for a businessman.There was a big box in the businessman’s living room.The businessman pointed at the box and said,“There’s only one thing you  1  do.Don’t open the box.”After   2   this,he left the living room.

The woman said to her husband,“There must be   3   in the box.Let’s open it,shall we?” Her husband said ___4___ to her.

But the woman didn’t give up her idea.One day,she decided to ___5___ what was     __6   it.Her husband didn’t stop her this time.She opened the box and looked inside.She found nothing in the box and then tried hard to close it,    7   she failed.

That evening the businessman came home and found the box was    8  .He was very __9___ and asked the woman and her husband to leave his home.

“But there is nothing in the box,”the woman said.“We    10    anything at all.”The businessman shouted at them,“The box is not important.I cannot believe you.That’s important!”

小题1:A.needn’t     B.wouldn’t    C.mustn’t       D don’t have to

小题2:A.saying     B.said        C.says         D to say

小题3:A.expensive something   B.something expensive

C.nothing expensive    D expensive anything

小题4:A.yes        B.nothing     C.no           D hello

小题5:A.look for    B.clean up    C.find out     D get over

小题6:A.near        B.under       C.in           D on

小题7:A.though     B.or         C.unless       D but

小题8:A.closed     B.empty       C.open         D full

小题9:A.happy      B.angry       C.stressed out  D worried

小题10:A.didn’t take  B.won’t take  C.haven’t taken  D aren’t taking

选择题