问题 单项选择题

某带壁柱墙,截面尺寸如图所示,采用烧结普通砖MU10,M5水泥混合砂浆砌筑,砌体施工质量控制等级为B级。墙上支承截面尺寸为200mm×500mm的钢筋混凝土大梁,梁端埋置长度370mm。已知梁端支承压力设计值为75kN,上部轴向力的设计值为170kN。结构安全等级为二级。

对梁端支承处砌体的局部受压承载力验算,ψN0+N1≤ηγfA1的计算值,左右端项与下列何项数值最为接近()。

A.80kN>65kN

B.75kN>68kN

C.90kN>65kN

D.70kN>68kN

答案

参考答案:B

解析:

解答如下:

根据《砌体结构设计规范》5.2.4条:

Al=a0b=182.6×200=36520mm2

A0=370×370+2×155×240=211300mm2

A0/Al=211300/36520=5.79>3.0,取ψ=0.0

ψN0+Nl=0+75=75kN>ηγfAl=0.7×1.77×1.5×36520=67.9kN

阅读理解

Woman Uses Daughter's Key to "Steal" Car

Charlie Vansant, a college student of Athens, Ohio who reported that his car was stolen, got a surprise when he learned a woman had mistaken it for her daughter's car and taken it-using her key.

Kate Anderson became an accidental car thief when picking up her daughter's car near an Ohio University building last week.Anderson spotted the nickel-~ay Toyota Camry(银灰色丰田凯美瑞)and used her daughter's key to unlock the car, start the engine and drive home-without realizing that the car wasn't her daughter's.

When Charlie Vansant left class a short time later, he found only an empty parking spot.He first assumed the car had been towed, but when the police couldn't find a record of it, they took a theft report.

The morning after Anderson took the car, her daughter discovered the Camry in the driveway wasn't hers.Anderson said she was able to find Vansant's name on paperwork in the glove compartment and look up his phone number on the website for the university.

When Anderson told Charlie the car was in her driveway,  "It sounded real suspicious at first, like may be she wanted to hold the thing for ransom(赎金),”said Vansant.He eventually went to the house with a police officer, where he was reunited with his car.According to police report, the ease was closed "because of mistaken car identity", Anderson wasn't charged.

Vansant seemed to blame the car company more than the "thief"."Her key fit not only my lock, but my ignition(点火装置)as well - so high-five for Toyota.I guess." he said.

小题1:What does the underlined word "towed" mean in paragraph 3 ?

A.removed

B.damaged

C.stolen

D.sold小题2:Which of the following is NOT true according to the passage?

A.Mrs.Anderson's daughter discovered the car her mother drove was not hers.

B.Mrs.Anderson stole Charlie's car at the request of her daughter.

C.Charlie had thought he had to give Anderson money to get his car back.

D.Mrs.Anderson used her daughter's key to unlock Charlie's car and drive home.小题3:What does Charlie mean by "h~-five for Toyota"?

A.He is blaming Toyota for the poor quality of car keys.

B.He should thank Toyota for returning his car.

C.He wants to celebrate with Toyota for getting his car back.

D.He thinks highly of Toyota for producing large quantities of cars.小题4:What is likely to happen next according to the passage?

A.Mrs.Anderson was charged with stealing a car.

B.Charlie blamed Mrs.Anderson for mistakenly taking his car.

C.Charlie would ask the Toyota Company to give him an explanation.

D.The Toyota Company would give Charlie a new car as compensation.

选择题