• 2022-06-19
    图示结构中,已知各杆EI=常数,则A截面弯矩(内侧受拉为正)为:[img=186x125]18033023a1aeecd.jpg[/img]
    A: 0
    B: [img=53x27]18033023aadde33.png[/img]
    C: [img=53x27]18033023b332e94.png[/img]
    D: [img=71x27]18033023bc0af90.png[/img]