力F作用在垂直框架平面内，上、下横梁可以简化为对称的双悬臂简支梁。只是

The force F acts in the vertical frame plane, and the upper and lower beams can be simplified into symmetrical double-cantilever simply supported beams. Only the force F acts on the beam and the lower edge. While the beam is subjected to bending, it is also subjected to torque and concentrated force P in the plane, thus forming a symmetric cubic statically indeterminate frame. The bending moment diagram is shown in Figure 3-5. The maximum bending moment is at the cantilever root of the upper beam, which is more dangerous

Force F acts in a vertical frame plane, and the upper and lower beams can be reduced to symmetrical double cantilevered simple girders. It's just that force F acts on the upper and lower edges of the beam. The beam is also affected by the action of torque, and the effect of concentrated force P in the plane, thus forming the three-time super-static frame of symmetry. The bending moment chart is shown in Figure 3-5. Maximum bending moment at the root of the cantilever on the upper beam, and the upper beam cantilever root are more dangerous

When the force F acts on the vertical frame plane, the upper and lower beams can be simplified as symmetrical double cantilever simply supported beams. Only force F acts on the upper and lower edges of the beam. The beam is subjected to the bending action as well as the torque action. In the plane, it is subjected to the concentrated force P, thus forming a symmetrical three times statically indeterminate frame. The bending moment diagram is shown in Figure 3-5. The maximum bending moment is at the cantilever root of the upper beam, which is dangerous<br>