St Flashcards

1
Q

The equilibrium equations alone are sufficient for determining the support reactions and internal forces of indeterminate structures.

A

False

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2
Q

The compatibility conditions in structural analysis ensures that the deflections and rotation of all members meeting at a rigid joint are different.

A

False

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3
Q

The maximum stresses in statically indeterminate structures are generally lower than those in comparable determinate structures.

A

True

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4
Q

Statically indeterminate structures, if properly designed, have the capacity for redistributing loads when certain structural portions become overstressed or collapse in cases of overloads due to earthquakes.

A

True

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5
Q

The force methods are preferred for the analysis of large and highly redundant structures.

A

True

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6
Q

Im structural analysis, a ________ refers to an extra member or support that can-be removed without affecting the equilibrium of the structures.

A

Redundants

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7
Q

The ________ of a structure refers to its ability to resist overturning, sliding or collapsing under applied loads and forces

A

Structural stability

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8
Q

The method of consistent deformation, also known as the ________, is a structural analysis technique.

A

Force Method

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9
Q

what is a measure of its resistance to deformation in structures

A

Stiffness

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10
Q

To solve statically indeterminate structures, additional _____ or deformation methods are employed.

A

Method

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11
Q

When all forces in a structure can be determined from the equilibrium equation

A

STATICALLY DETERMINATE STRUCTURES

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12
Q

Structures having more unknown forces than available equilibrium equations.

A

STATICALLY INDETERMINATE STRUCTURES

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13
Q

Additional equations needed to solve for the unknown reactions

A

SI STRUCTURES

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14
Q

The additional support reactions on the beam or shaft that are not needed to keep it in stable equilibrium are called

A

Redundants

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15
Q

Referred to as degree of indeterminacy

A

No of Redundants

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16
Q

The max stresses in SI structures are generally lower than those in comparable determinate structures

A

Smaller stresses

17
Q

SI structures generally have higher stiffnesses than those of comparable determinate structures.

A

Greater stiffnesses

18
Q

A system is said to be ____ if the support reactions and the internal forces cannot be determined using statics alone.

A

Indeterminate

19
Q

Consists of more members and more supports

A

Indeterminate structures

20
Q

Support settlements do not cause any stresses in determinate structures, they may, however, induce significant stresses in independence structures, which should be taken into account when designing IS.

A

Stresses due to support settlements

21
Q

Like support settlements, these effects do not cause stresses in determinate structures but may induce significant stresses in indeterminate ones.

A

Stresses due to temperature changes and fabrication errors

22
Q

Most of the structures designed today are SI.

23
Q

RC buildings are considered in most cases a statically indeterminate structures since the columns beams are considered as continuous member through the joints over the support.

24
Q

Are generally convenient for analyzing small structures with few redundant.

A

Force methods

25
More systematic, can be easily implemented on computers, preferred for the analysis of large and highly redundant structures.
Displacement Methods
26
If the support reactions are concurrent( intersect at a single point) thenthe truss is
Externally stable
27
If the support reactions are paralled, then the truss is
Externally unstable
28
Introduced by James C Maxwell
CDM
29
In this methods, the unknowns are the redundant forces.
CDM
30
Angle between deflected beam to the actual beam at the same point
Slope of the beam
31
Is defined as the vertical displacement of a point on a loaded beam.
Deflection Of a beam