11.2.5. Bottom Girder Shear

Try these first

1. 1.

   Define shear force.

   Hint

   Think about forces that cause layers to slide.

2. 2.

   What is a free body diagram?

   Hint

   Consider what it means to isolate a body in analysis.

3. 3.

   What is the primary effect of vertical loads on girders?

   • They create shear forces
   • They increase axial forces
   • They have no effect

   Hint

   Consider how weight acts on a beam.

4. 4.

   Free body diagrams are useful for:

   • True
   • False

   Hint

   Think of them as tools for simplification.

5. 5.

   Given a beam with a length of 5m and a uniform load of 20 kN, calculate the shear forces at 1m, 2m, 3m, and 4m from the left support.

   Hint

   Determine how much weight each section bears based on its support and position.

6. 6.

   Evaluate the consequences of incorrectly assuming a cantilever beam is simply supported when analyzing shear and moment.

   Hint

   Think of scenarios where incorrect assumptions could fail sudden loads.