In the following cases, ( ) belongs to pure bending.
A: The external loads act on the longitudinal symmetric plane of the member;
B: The members are only bent without torsion and tension deformation;
C: The load on the member is only concentrated couples;
D: There is no shear force on each cross section of the member, and the bending moment is a constant.
A: The external loads act on the longitudinal symmetric plane of the member;
B: The members are only bent without torsion and tension deformation;
C: The load on the member is only concentrated couples;
D: There is no shear force on each cross section of the member, and the bending moment is a constant.
举一反三
- For plane bending the characteristics of deformation are ( ). A: The cross section remains plane when bent; B: The axis after deformation is a plane curve; C: All external loads act on the same plane; D: The axis after deformation is in the same plane with the loading plane.
- The section where the bending moment diagram has abrupt change is: () A: Section with concentrated load B: Section with zero shear force C: Section with zero load D: Section with concentrated couple
- As shown in the figure, which of the following is true （ ）[img=575x436]1803a03bbd6c2c3.png[/img] A: The structure is a truss. B: The structure is a composite structure in which only member 57 is two-force member (truss member). C: Only member 34 has bending moment. D: All members except member 123 are truss members.
- When calculating the displacement of composite structure: A: Only bending moment is considered B: Only axial force is considered C: Bending moment and shear force are considered D: Bending moment and axial force are considered
- The internal forces in a thin plate under bending deformation include: A: bending moment B: twisting moment C: shear force D: axial force