5.2. Factors Affecting Beam Deflections

Try these first

1. 1.

   What happens to beam deflection if the span length is increased?

   Hint

   Think about how weight on a longer beam would affect bending.

2. 2.

   How does increasing the applied load affect deflection?

   Hint

   Consider what happens if you add more weight to a scale.

3. 3.

   What is the relationship between span length and beam deflection?

   • A) Inversely proportional
   • B) Directly proportional
   • C) No relationship

   Hint

   Think of how a longer pole would bend more under the same weight.

4. 4.

   True or False: Increasing the modulus of elasticity will decrease beam deflection.

   • True
   • False

   Hint

   Remember stiffer materials are less prone to bending.

5. 5.

   A 12m steel beam (E = 200 GPa, I = 3000 cm^4) has a uniform load of 40 kN. Calculate the deflection at mid-span.

   Hint

   Ensure unit consistency!

6. 6.

   Discuss the effects of using different materials for beams in a bridge project. Consider both the deflection and strength aspects.

   Hint

   Investigate properties of steel, wood, and composite materials.