问题 问答题

已知某现浇梁的底模板承受的垂直荷载分别如下:

(1)模板自重:1.5kN/m;

(2)新浇筑混凝土重:22.55kN/m;

(3)钢筋重:0.2kN/m;

(4)施工操作人员及施工设备荷载为:7.5kN/m;

(5)振捣混凝土时产生的荷载为3.6kN/m。

若梁长6m,分别由6根支撑来承担,每根支撑承受的荷载多少若木材的顺设抗压强度为12MPa时,至少应该用多大截面的方木作支撑。

答案

参考答案:

N=(1.5+22.55+0.2+7.5+6)×6÷6=37.7kN

每个支撑承受37.7kN

则至少要用56mm×56mm的木料作支撑。

实际上由于稳定、刚度等原因,则断面的实际尺寸远大于此数值。

阅读理解

阅读理解。

     Henry found work in a bookstore after he finished middle school. He wouldn't do anything but wanted

to get rich. Mr King thought he was too lazy and was going to send him away. Henry was afraid and had

to work hard.

     It was a cold morning. It was snowing and there was thin ice on the streets. Few people went to buy

the books and the young man had nothing to do. He hated to read, so he watched the traffic. Suddenly he saw a bag fall off a truck and it landed by the other side of the street.

     "It must be full of expensive things, "Henry said to himself. "I have to get it, or others will take it away. "

     He went out of the shop and ran across the street. A driver saw him and began to whistle(鸣笛), but he didn't hear it and went on running. The man drove aside, hit a big tree and was hurt in the accident. Two

weeks later Henry was taken to court(法庭). A judge asked if he heard the whistle when he was running

across the street. He said that something was wrong with his ears and he could hear nothing.

     "But you've heard me this time."said the judge.

     "Oh, I'm sorry. Now I can hear with one ear."

     "Cover the ear with your hand and listen to me with your deaf(聋的)one. Well, can you hear me? "

     "No, I can't. sir. "

1. What was Mr. King?     

A. a driver

B. a doctor        

C. a policeman  

D. a shopkeeper

2. Why did Mr. King want to send Henry away?    

A. Because Henry was too lazy. 

B. Because Henry hoped to be rich. 

C. Because Henry finished middle school. 

D. Because Henry sold few books.

3. The driver was afraid to _______, so he drove aside. 

A. hit Henry

B. hurt himself        

C. fall behind

D. lose the bag

4. What does the underlined word"judge"mean in Chinese?

A. 裁判    

B. 律师            

C. 法官    

D. 原告

5. Why did Henry say that he was deaf?

A. He wanted to have a joke with the judge. 

B. He wanted to get the judge's help

C. He wanted to find another piece of work

D. He didn't want to pay for the accident.

单项选择题