Why did Johnstone get 8job in Sydney? [A]Thejob could help him fly round Australia. [B] Hewanted to save money for his wedding. [C]Thejob there was easy and well-paid. [D]Heneeded the money to see Dolby.
【简答题】试验算下图所示牛腿与柱连接的对接焊缝强度。荷载设计值F=200kN,钢材Q235,焊条E43型,手工焊,无引弧板,焊缝质量三级。(提示:假定剪力全部由腹板上的焊缝承受。须验算A点的弯曲拉应力和B、C点的折算应力。注意C点承受弯曲压应力和剪应力,故其折算应力不大于1.1f c w ,而承受弯曲拉应力的B点,其折算应力不大于1.1f t w )。