问题 单项选择题 A3型题

某钢筋混凝土框架边梁,矩形截面尺寸为500mm×500mm,计算跨度ι0为6.3m,框架边梁上作用有两根次梁传来的集中力设计值P=150kN,边梁上的均布荷载设计值(包括自重)q=9kN/m,如图1-2所示。框架边梁的混凝土强度等级为C25,纵筋采用HRB400级,箍筋采用HPB300级钢筋。已知框架边梁支座截面弯矩设计值M=226.64kN·m,剪力设计值V=153.35kN,扭矩设计值T=50kN·m。结构安全等级二级。取as=as=35mm。

若框架边梁的箍筋采用双肢箍,箍筋间距s=100mm,试问,边梁支座截面的抗剪箍筋配置量Asv(mm2),与下列何项数值最为接近?提示:①按集中荷载下的独立剪扭构件计算;②支座截面条件满足规范要求()。

A.70

B.85

C.95

D.110

答案

参考答案:A

单项选择题
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One day an out of work mimic(滑稽演员) is visiting the zoo and attempts to earn some money as a street performer. As soon as he starts to draw the crowd,a zoo keeper grabs him and drags him into his office. The zoo keeper explains to the mimic that the zoo's most popular attraction,a gorilla(大猩猩),has died suddenly and the keeper fears that attendance at the zoo will fall off. He offers the mimic a job to dress up as the gorilla until they can get another one. The mimic accepts.

So the next morning the mimic puts on the gorilla suit and enters the cage before the crowd comes. He discovers that it's a great job. He can sleep all he wants,play and make fun of people and he draws bigger crowds than he ever did as a mimic. However,eventually the crowds tire of him and he tires of just swinging on wires. He begins to notice that the people are paying more attention to the lion in the cage next to his. Not wanting to lose the attention of his audience,he climbs to the top of his cage,crawls across a partition(隔离物),and dangles from the top to the lion's cage. Of course,this makes the lion very angry,but the crowd loves it.

At the end of the day the zoo keeper comes and gives the mimic a raise for being such a good attraction. Well,this goes on for some time-the mimic keeps taunting the lion,the crowds grow larger,and his salary keeps going up. Then one terrible day when he is dangling over the angry lion he slips and falls. The mimic is terrified.

The lion gathers itself and prepares to attack. The mimic is so scared that he begins to run round and round the cage with the lion close behind. Finally,the mimic starts screaming and yelling,“Help me,help me!”But the lion is quick and attacks. The mimic soon finds himself flat on his back looking up at the angry lion and the lion says,“Shut up,you idiot!Do you want to get us both fired?”

小题1:The mimic visits the zoo to________.

A.take care of the dying gorilla

B.beg some money from the zoo keeper

C.ask for a job there

D.perform and earn some money there小题2:The zoo keeper offers the mimic a job to act as the gorilla because________.

A.it is more expensive to hire a real gorilla

B.the real gorilla died but the keeper does not want to lose its visitors

C.he likes the mimic's performance

D.he wants to help the mimic who is out of work小题3:What does the mimic feel about the new job at first?

A.He likes it because he has enough freedom in the job.

B.He likes it but he prefers to working as a mimic.

C.He doesn't like it for people do not respect him.

D.He doesn't like it because he gets little pay.小题4:The mimic climbs to the lion's cage because________.

A.he finds it more interesting to climb the cage

B.he wants to play with the lion

C.he wants to attract the attention of his audience

D.he has never seen a lion before小题5:What does the passage mainly tell us?

A.The mimic and his job

B.The mimic and his success

C.The actor and the mimic

D.The mimic and his animals