structures

Question 1

functions of structure

Answer 1

S -support a load
P - protect something
C - contain something
S - span between points

Question 2

types of forces

Answer 2

1. compression
2. tension
3. bending
   
   • beam , both sides supported (eg, book shelves )
   • cantilever , only one side supported (eg, lamp post)
4. torsion
5. shear

Question 3

reinforcing structures

Answer 3

1. triangulation
   
   • created and used to provide strength and rigidity to the structure
   • gives the crane strength to remain upright and support the loads
2. trusses
   
   • have triangular parts to provide strength and rigidity
   • often used for supporting roof and bridges

Question 4

other methods of reinforcing structures

Answer 4

1. stiffened folds
   - eg trays with edges folded to add rigidity
2. lamination
   - placing layers of thin sheet materials and joining them together
   - thin sheet materials can be made stronger by lamination
3. honeycomb
   - strong in compression yet very light
4. gusset plates
   - used for adding strength and supporting the joint
   - increases area of joint and distributes the stress more evenly
5. ribs
   - acts as a stiffeners
   - used to add strength to walls and prevent them from caving in
6. braces
   - add strength and support to a structure
7. webs
   - add strength and support to structure