问题 问答题

某建筑物采用框架剪力墙结构,在一层共有8根编号为L1的梁,如图6-1所示:“结构设计总说明”中有如下说明:梁与剪力墙、柱交接处应设箍筋加密区,长度为1.5H(H为梁高)。钢筋保护层为25mm。

已知:钢筋总重量按下列各直径的每米重量计算(表6-1)。

 

计算各钢筋的计算长度、合计的根数及重量。

答案

参考答案:

各钢筋每根的计算长度、根数和重量。

①号钢筋:

每根长度=6240mm-2×25mm+2×200mm+2×6.25×25mm=6902.5mm=6.9025m

总根数=2×8根=16根

总重量=6.9025m/根×16根×3.854kg/m=425.64kg

②号钢筋:

每根长度=6240mm-2×25mm+2×6.25×20mm=6440mm=6.44m

总根数=2×8根=16根

总重量=6.44m/根×16根×2.470kg/m=254.51kg

③号钢筋:

每根长度=6240mm-2×25mm+2×0.414×(500-2×25)mm+2×6.25×25mm=875.1mm=6.8751m

总根数=1×8=8根

总重量=6.8751 m/根×8根×3.854kg/m=211.97kg

④号钢筋的计算与③号钢筋完全相同。

⑤号钢筋:

每根长度=(200mm-2×25mm+500-2×25mm)×2+2×5×8mm=1280mm=1.28m

总根数=加密区根数+非加密区根数

总重量=1.28m/根×328根×0.395kg/m=165.84kg

将有关数列表(表6-2)。

填空题
单项选择题

When I was 17, I read a quote that went something like:"If you live each day as if it were your last, someday you’ll most certainly be right." It made an impression on me, and since then, for the past 33 years, I have looked in the mirror every morning and asked myself, "If today were the last day of my life, would I want to do what I am about to do today "
Remembering that I’ll be dead soon is the most important tool I’ve ever encountered to help me make the big choices in life.
About a year ago I was diagnosed with cancer. The doctors told me this was almost certainly a type of cancer that was incurable, and that I would live no longer than three to six months. My doctor advised me to go home and get my affairs in order, which is doctor’s code for preparing yourself to die.
I lived with that diagnosis all day. I was completely in despair. Later that evening I had another biopsy and my wife told me that tumor turned out to be curable with surgery. I had the surgery and I’m fine now.
This was the closest I’v been to facing death. To tell the truth, no one wants to die. And yet death is the destination we all share. No one has ever escaped it. It clears out the old to make room for the new. Right now the new is you, but someday not too long from now, you will gradually become the old and be cleared away.
Your time is so limited that you shouldn’t waste it repeating someone else’s life. Don’t be trapped by dogma-which is living with the results of other people’ s thinking. Don’ t let the noise of others’ opinions drown out your own inner voice. And most important, have the courage to follow your heart. It somehow already knows what you truly want to become. Everything else is secondary.

In the author’s opinion, we should______.

A. follow others’ advice
B. do what we want
C. keep a positive attitude towards life
D. take exercise and keep healthy