Structural Analysis – Multiple Choice Questions (MCQs)

1. 73. What is 'resonance' in structural dynamics?

   • A. A condition where the frequency of the applied load matches the natural frequency of the structure
   • B. leading to large amplitudes of vibration
   • C. A condition of no vibration
   • D. A condition of damping

2. 74. What is 'damping' in structural dynamics?

   • A. The dissipation of energy from a vibrating system
   • B. reducing the amplitude of vibration
   • C. The addition of energy to a system
   • D. The increase in vibration amplitude

3. 75. What is 'response spectrum'?

   • A. A plot showing the maximum response (e.g.
   • B. acceleration
   • C. velocity
   • D. displacement) of single-degree-of-freedom systems to a specific ground motion

4. 76. What is 'time history analysis'?

   • A. A dynamic analysis method where the structural response is computed step-by-step in time for a given time-varying load
   • B. A static analysis method
   • C. A linear analysis method
   • D. A frequency domain analysis method

5. 77. What is 'modal analysis'?

   • A. A method for determining the natural frequencies and mode shapes of a structure
   • B. A method for static analysis
   • C. A method for non-linear analysis
   • D. A method for material characterization

6. 78. What is 'mode shape'?

   • A. The characteristic pattern of deformation of a structure when it vibrates at a natural frequency
   • B. The shape of the structure before loading
   • C. The shape of the applied load
   • D. The shape of the support

7. 79. What is 'elastic stability'?

   • A. The ability of a structure to return to its original shape after small disturbances
   • B. before buckling occurs
   • C. The ability to deform plastically
   • D. The ability to resist fracture

8. 80. What is 'geometric non-linearity'?

   • A. Non-linearity arising from large deformations where the equilibrium equations must be formulated on the deformed geometry
   • B. Non-linearity due to material properties
   • C. Non-linearity due to boundary conditions
   • D. Non-linearity due to load type

9. 81. What is 'material non-linearity'?

   • A. Non-linearity arising from the non-linear stress-strain behavior of the material
   • B. Non-linearity due to large deformations
   • C. Non-linearity due to boundary conditions
   • D. Non-linearity due to load type

10. 82. What is 'boundary conditions' in structural analysis?

    • A. The constraints or supports applied to a structure that define its behavior at its boundaries
    • B. The loads applied to the structure
    • C. The material properties
    • D. The dimensions of the structure

11. 83. What is 'degree of redundancy'?

    • A. The number of redundant forces or reactions in an indeterminate structure
    • B. The number of supports
    • C. The number of joints
    • D. The number of members

12. 84. What is 'live load'?

    • A. A load that is variable or movable
    • B. such as people
    • C. furniture
    • D. or vehicles