DP - Ilaw

Question 1

A condition in which structure becomes unsafe due to possible collapse of the structure.

Answer 1

Strength Limit State

Question 2

Excessive vibration is an example of strength limit state.

Answer 2

False - serviceability limit state

Question 3

Resistance due to flexure is an example of serviceability limit state.

Answer 3

False

Question 4

Working stress design and ultimate strength design are considered Limit State Design.

Answer 4

False

Question 5

ASD and LRFD are generally the same in terms of providing adequate factor of safety.

Answer 5

False - same in serviceability, different in safety

Question 6

Allowable stress must always be greater than or equal to actual stress is a strength design approach.

Answer 6

True

Question 7

Overloading of structures and under strengthening of members are the factors of safety included in _________ design method.

Answer 7

Load Resistance Factor Design

Question 8

In the allowable stress design method, the factor of safety is given to the resistance and no factor of safety is given to the actual ________.

Answer 8

Nominal Strength

Question 9

The usual factor of safety given to beams and tension members is _____.

Answer 9

1.67

Question 10

LRFD is limited to _____________ behavior.

Answer 10

inelastic

Question 11

Connection design have bigger factor of safety than member design like columns and beams because connection failure are _________.

Answer 11

Brittle

Question 12

The load factor used in strength design methods depends on ___________.

Answer 12

Type of Member

Question 13

Since LRFD or Strength design method involved several factors of safety, the probability of failure is given by the margin of safety as well as ________.

Answer 13

Reliability Index

Question 14

Importance of the member of the structure may affect the ∅ value.

Answer 14

True

Question 15

LRFD or strength design method will always be safer and economical than ASD or WSD.

Answer 15

True

Question 15

The potential limit state are the same for every structural member subjected to a specific load requirement.

Answer 15

False

Question 16

Plastic design is a part of limit state design.

Answer 16

True

Question 17

The allowable strength design method is patterned after __________.

Answer 17

WSD

Question 18

The safety criterion in design allows that __________.

Answer 18

R ≥ Q

Question 19

The factor of safety in design is given by ______________.

Answer 19

R / Q

Question 20

When the factor of safety is high, the reliability index is ________.

Answer 20

High

Question 21

The factor of safety for connection ranges from 2.5 to 3 because it is __________.

Answer 21

Critical