题目内容
为便于制作模板，轴心受压构件截面一般采用方形或矩形。
查看答案
搜索结果不匹配？点我反馈
更多问题
为了避免矩形截面轴心受压构件长细比过大，承载力降低过多，常取l0/b ≤20, l0/h ≤15。
为了减小构件的截面尺寸，节省钢材，受压构件宜采用较高强度等级的混凝土。
柱中纵向钢筋直径不宜小于16mm；全部纵向钢筋的配筋率不宜大于6%
[音频]16. A) How space research benefits people on Earth. B) When the International Space Station was built. C) How many space shuttle missions there will be. D) When America's earliest space program started.17. A) They tried to make best use of the latest technology. B) They tried to meet astronauts' specific requirements. C) They developed objects for astronauts to use in outer space. D) They accurately calculated the speed of the orbiting shuttles.18. A) They are expensive to make. B) They are extremely accurate. C) They were first made in space. D) They were invented in the 1970s.
微信支付 
支付宝支付