單項(xiàng)選擇題

判斷出設(shè)計(jì)計(jì)算跨后,對(duì)該跨承載索的各技術(shù)參數(shù)進(jìn)行優(yōu)化設(shè)計(jì)計(jì)算,設(shè)計(jì)計(jì)算跨有荷中撓系數(shù)S推薦值為()。

A.[0.03,0.05]
B.[0.05,0.065]
C.[0.02,0.08]
D.[0.05,0.08]

微信掃碼免費(fèi)搜題