jb-c 中文意思是什麼

jb-c 解釋

In most cases, it was found that the jb criterion is safer than hg specification, but adverse result was obtained when r / r is close to 0. 8 and d / t is too small ( less than 40 ). code in c language was worked out for simplifying the calculation

在大多數情況下，按照jb標準對此種結構進行補強設計時其安全裕度要比hg標準為高；但是當開孔率接近0 . 8且d t很小時（不大於40 ），依jb標準補強設計后的安全裕度反而較按hg規范計算結果要小。