• 2021-04-14
    图示拱结构中 杆AB的轴力FNAB为 QQ 20180521020846 png
  • 0

    内容

    • 0

      图示拱结构中,杆的轴力 (拉力)为:

    • 1

      图示受拉直杆,其中AB段与BC段内的轴力及应力关系为()。 A: FNAB=FNBCσAB=σBC B: FNAB=FNBCσAB>;σBC C: FNAB=FNBCσAB<;σBC D: FNAB<;FNBCσAB<;σBC

    • 2

      图示三铰拱,链杆AB轴力(拉力为正)为:ca1b5c20536fea44bf19702cb3951763.png

    • 3

      图示变截面杆,设AB段和BC段的轴力分别为FNAB和FNBC ,则下列结论中正确的是________。[img=194x60]1802f50df8a2aa0.jpg[/img] A: FNAB = 3kN,FNBC = –6kN B: FNAB = 3kN,FNBC = –9kN C: FNAB = 3kN,FNBC = 6kN D: FNAB = 3kN,FNBC = 9kN

    • 4

      图示变截面杆,设AB段和BC段的轴力分别为FNAB和FNBC ,则下列结论中正确的是________。[img=194x60]17de93ecacc6d44.jpg[/img] A: FNAB = 3kN,FNBC = –6kN B: FNAB = 3kN,FNBC = –9kN C: FNAB = 3kN,FNBC = 6kN D: FNAB = 3kN,FNBC = 9kN