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.
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.
The distribution bending moment in the moment distribution method is equal to: A: Fixed end bending moment B: Distal bending moment C: The inverse of the unbalanced moment is multiplied by the distribution coefficient D: Multiplying the bending moment of the fixed end by the distribution coefficient
The distribution bending moment in the moment distribution method is equal to: A: Fixed end bending moment B: Distal bending moment C: The inverse of the unbalanced moment is multiplied by the distribution coefficient D: Multiplying the bending moment of the fixed end by the distribution coefficient
An axial compressive force F＝Fcr is acting on an ideal column in linear equilibrium. And then the column produces the bending deformation due to a small lateral disturbing force. If the disturbing force is removed at this time, ( ) . A: The bending deformation will disappear and return to a straight line B: The bending deformation is reduced and the straight line shape can not be restored C: The bending state is not changed D: The bending deformation continues to increase
An axial compressive force F＝Fcr is acting on an ideal column in linear equilibrium. And then the column produces the bending deformation due to a small lateral disturbing force. If the disturbing force is removed at this time, ( ) . A: The bending deformation will disappear and return to a straight line B: The bending deformation is reduced and the straight line shape can not be restored C: The bending state is not changed D: The bending deformation continues to increase
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
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
b) The term “flexion” refers bending of a joint muscle, “semiflexion” means half of the bending, while “dorsiflexion” may mean_________.
b) The term “flexion” refers bending of a joint muscle, “semiflexion” means half of the bending, while “dorsiflexion” may mean_________.
Bending in a main plane is called（）
Bending in a main plane is called（）
There is no neutral layer (one layer without deformation) for a bar under the combination of tension and bending.
There is no neutral layer (one layer without deformation) for a bar under the combination of tension and bending.
The internal forces in a thin plate under bending deformation include: A: bending moment B: twisting moment C: shear force D: axial force
The internal forces in a thin plate under bending deformation include: A: bending moment B: twisting moment C: shear force D: axial force
In terms of the flexural stiffness of reinforced concrete beams, which of the following statements is wrong. A: The bending stiffness of reinforced concrete beam varies in the process of loading B: The short-term bending stiffness of reinforced concrete beams is derived from the curvature relation of cross-section C: The short-term average bending stiffness is adopted in the deflection checking calculation D: The bending stiffness under long-term load is smaller than that under short-term load
In terms of the flexural stiffness of reinforced concrete beams, which of the following statements is wrong. A: The bending stiffness of reinforced concrete beam varies in the process of loading B: The short-term bending stiffness of reinforced concrete beams is derived from the curvature relation of cross-section C: The short-term average bending stiffness is adopted in the deflection checking calculation D: The bending stiffness under long-term load is smaller than that under short-term load
(4) The normal stress associated with the bending moment is ( ) MPa
(4) The normal stress associated with the bending moment is ( ) MPa