Question

26.1 The Application of the compatibility condition in the analysis of statically indeterminate structures is:

1. Necessary
2. Sometimes necessary
3. Approximated through the force deformation relation (d) Not related to the above.

26.2 The conditions required to be satisfied for the analysis of statically determinate structures are:

1. Equilibrium only
2. Equilibrium and compatibility
3. Equilibrium, compatibility and force-deformation relation

26.3 The conditions required to be satisfied for the analysis of statically indeterminate structures are:

1. Equilibrium and compatibility only
2. compatibility and force-deformation only
3. force-deformation and Equilibrium only
4. None of the above set is complete

26.4 The unit load method of analysis of deflections in structures is based on:

1. Force method concept
2. Stiffness method concept
3. Energy method
4. Approximate method

26.5 The analysis of statically indeterminate structures by the unit load method is based on:

1. Force method concept
2. Stiffness method concept
3. Both of the above
4. None of the above

26.6 The analysis of statically indeterminate structures by the unit load method is based on:

1. Consistent deformation
2. Consistent force
3. Stiffness
4. None of the above

26.7 Minor variations in the lengths of members from the geometrically computed ones in a statically determinate structure causes --------------while assembling (Lack of fit):

1. Secondary forces
2. No forces at all
3. Forces comparable with the lack of fit
4. Strains

26.8 Minor variations in the lengths of members from the geometrically computed ones in a

statically indeterminate structure causes------while assembling (lack of fit): a) Internal forces only

2. External reactions only
3. No forces
4. Internal and for external reactions

26.9 An unequal rise in the temperature of members in statically determinate structures causes:

1. No forces
2. Reactions
3. Secondary forces
4. Strains and stresses

26.10 An unequal rise in the temperature of members in a statically indeterminate structures causes: (a) No forces

2. Strains only
3. Forces in members
4. Secondary reactions

26.11 Unequal settlements in the supports of a statically determinate structure develop:

1. Reactions from supports
2. Member forces
3. No reactions
4. Forces in a limited members.

26.12 Unequal settlements in the supports of a statically indeterminate structure develop:

1. Reactions from supports
2. No reactions
3. Minor member forces
4. Strains in some members only

26.13 The force method in structural analysis starts with:

1. Equilibrium field
2. Compatible deformations
3. Equilibrium and compatibility conditions
4. Force-deformation relation only

26.14 The force method in structural analysis always ensures:

1. Compatibility of deformations
2. Kinematically-admissible strains
3. Equilibrium of forces
4. safety

26.15 The flexibility method in structural analysis starts with:

1. Compatible deformations
2. Equilibrium of forces
3. Force-deformation relation
4. Kinematically-admissible deformations

26.16 The force method in structural analysis is also known as:

1. Slope-deflection method
2. Moment-distribution method
3. Consistent-deformation method
4. Stiffness method

26.17 The conjugate-beam method falls in the category of:

1. Force method
2. Stiffness method
3. Displacement method (d) None of the above.

26.18 The method of column analogy in structural analysis falls in the category of:

1. Displacement method
2. Stiffness method
3. Flexibility method (d) None of the above

26.19 The stiffness method of structural analysis always starts with:

1. Force-deformation relation
2. Equilibrium conditions
3. Compatible deformations
4. None of the above

26.20 The displacement method of structural analysis starts with:

1. Kinematically-admissible deformations
2. Equilibrium of forces
3. Force-deformation relation
4. None of the above

26.21 The stiffness method in structural analysis is also known as:

1. Consistant-deformation method
2. Unit load method
3. Force method
4. Displacement method

26.22 The slope-deflection method in structural analysis falls in the category of:

1. Force method
2. Flexibility method
3. Consistant-deformation method
4. Stiffness method

Answer 1

Answer 26.1 : - (a) Necessary

"The Application of the compatibility condition in the analysis of statically indeterminate structures is necessary"

Explanation

Structural analysis is conducted to determine the external and internal forces in a structure. All the forces in a structure should :

• Satisfy equilibrium conditions.
• Produce deformations which are compatible with the continuity and support conditions of the structure.

( In any structure, all conditions of static equilibrium and compatibility conditions must be satisfied).

In the statically determinate structures, equlibrium conditions are just sufficient to solve for the unknown forces. In indeterminate structures, compatibility conditions is necessary because equilibrium conditions alone cannot solve for the unknown forces in that structure.

Reference

1. "Matrix Analysis Framed Structures", by William Weaver, James M. Gere

2. "Structural Analysis: A Unified Classical and Matrix Approach", by Amin Ghali, Adam Neville, T G Brown