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A．High school teachers.B．Taxi drivers.C．Waiters.D．Fruit sellers,

A. High school teachers.
B. Taxi drivers.
C. Waiters.
D. Fruit sellers,

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力钢筋为HRB335，纵筋的混凝土保护层厚度c=30mm，配置螺旋式间接钢筋，箍筋直径为8mm，箍筋间距s=50mm，箍筋为HPB235钢筋。
假定柱的轴向压力设计值N=1240kN；对柱进行轴心受压构件验算(不计入间接钢筋的影响)，则柱的纵向受力钢筋的最小计算面积为()。

A. 1566mm2
B. 1.439mm2
C. 1376mm2
D. 1669mm2

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A．Why her parents wanted to go to Gettysburg.B．Why her family's vacation plans changed

A. Why her parents wanted to go to Gettysburg.
B. Why her family's vacation plans changed ten years ago.
C. Where her family went for a vacation ten years ago.
D. When her family went on their last vacation.

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试确定高度100m处围护结构的风荷载标准值(kN/m2)与下列()项数值最为接近。

A. 1.616
B. 1.945
C. 2.256
D. 2.505

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某单层工业厂房，设置有两台Q=25/10t的软钩桥式吊车，吊车每侧有两个车轮，轮距4m，最大轮压标准值Pmax=279.7kN，吊车横行小车重量标准值g=73.5kN，吊车轨道的高度hR=130mm。
厂房柱距12m，采用工字形截面的实腹式钢吊车梁，上翼缘板的厚度hf=18mm。腹板厚度tw=12mm。沿吊车梁腹板平面作用的最大剪力为V，在吊车梁顶面作用有吊车轮压产生的移动集中荷载P和吊车安全走道上的均布荷载q。
当吊车为中级工作制时，试问，作用在每个车轮处的横向水平荷载标准值(kN)，应与下列()项数值最为接近。

A. 15.9
B. 8
C. 22.2
D. 11.1

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A．High school teachers.B．Taxi drivers.C．Waiters.D．Fruit sellers,

A. High school teachers. B. Taxi drivers. C. Waiters. D. Fruit sellers,

A．Why her parents wanted to go to Gettysburg.B．Why her family's vacation plans changed

试确定高度100m处围护结构的风荷载标准值(kN/m2)与下列()项数值最为接近。

A. High school teachers.
B. Taxi drivers.
C. Waiters.
D. Fruit sellers,