Structure

Question 1

function of structures

Answer 1

support a load
span between points
contain something
protect something

Question 2

2 Types of forces

Answer 2

External, Internal

Question 3

External forces

Answer 3

Static (stationary) , Dynamic (moving)

Question 4

Static force

Answer 4

constant size, direction, position

Question 5

Dynamic force

Answer 5

change in size, direction, position

Question 6

force is measured in

Answer 6

Newton (N)

Question 7

types of forces

Answer 7

1. compression
2. tension
3. bending
4. torsion
5. shear

Question 8

strength

Answer 8

resist force without breaking

Question 9

hardness

Answer 9

resist cutting, scratching or wearing off

Question 10

toughness

Answer 10

withstand impact without breaking

Question 11

elasticity

Answer 11

return to its original shape after being deformed

Question 12

stiffness

Answer 12

resist deformation by an applied forced

Question 13

stiffness in bending

Answer 13

most stiff - least stiff
‘i’ beam
square section tube
round section tube
rectangular section
round section solid

Question 14

stiffness in torsion

Answer 14

most stiff - least stiff
round section tube
square section tube
round section solid
rectangular section
‘i’ beam

Question 15

methods of reinforcing structure

Answer 15

stiffened folds
lamination
honeycomb
ribs
gusset plates
braces
webs
triangulation

Question 16

triangulation

Answer 16

provide strength and rigidity

Question 17

reasons for structural failure

Answer 17

excessive loads
defective design
joint failure
wrong choice in use of material