问题 单项选择题

某五桩基矩形等厚承台尺寸如图所示,由于承台顶部在x、y方向均设有连续的连系梁承担柱底传来的弯矩,承台顶面仅承受柱传来的相应于荷载的基本组合时的竖向力F=3035.2kN。基本组合由永久荷载控制。已知桩截面尺寸为400mm×400mm,承台高度为600mm,h0x=540mm,h0y=520mm,柱截面尺寸为600mm×600mm,承台用C30混凝土,钢筋用HRB400级。

提示:按《建筑桩基技术规范》(JGJ 94—2008)计算。

垂直y方向的承台抗剪承载力(kN),与下列何项数值最为接近()。

A.1822

B.1876

C.1970

D.1955

答案

参考答案:B

解析:

解答如下:

b0=2.8m

由《建筑桩基技术规范》式(5.9.10-1):

βhsαftb0h0=1.0×0.901×1430×2.8×0.52=1876kN

单项选择题
单项选择题

Beyond question, Clinton was supposed to close up, stay out of sight, and avoid second- guessing his wife’s boss. After his ego blustered into oncoming traffic during Hillary’s heated primary race (1) Obama, the nation suffered from yet another turn of Clinton fatigue.

(2) this week Bill Clinton showed an instinct for robust, inclusive leadership that the (3) White House occupant could make good use of right for the time being. With President Obama struggling to (4) the political damage from the Gulf oil spill, Clinton not only can’t help himself—he’s worth being listened.

The conventional-wisdom (5) on President Obama’s early reaction to the spill was (6) he didn’t emote enough. He didn’t feel the (7) of all those people in the crisis whose livelihood would be destroyed, whose clean waters and wildlife would be (8) in black gunk.

Clinton considers this is an unfair (9) but offers a different—and more pointed— lesson to his young successor. "I think we ought to (10) in the same boat for a while... Let’s just (11) the problem, and then we can hold everybody responsible and emote or not emote, " Clinton conversed (12) CNN Anchor Wolf Blitzer.

Obama’s first (13) after the oil spill was to "feel the blame" rather than "feel the pain, " which are pretty sarcastic words as it were. No one intends to let British Petroleum (BP) management (14) the hook—for dangerously cutting corners, and for a (15) safety record. However, the President’s (16) focus on scolding BP consumed (17) White House energy while the oil gushed.

Great leaders don’t rush to criticise; Instead they instinctively (18) solutions. Rudy Giuliani, who didn’t stop to blame (19) intelligence for letting it happen, stood out from New York mayor with a girlfriend problem to 9/11 hero when he took control of a crisis and instilled confidence that a ravaged city could (20) beyond a terrorist attack.

19()

A.timely

B.faulty

C.creative

D.secret