29.1.4. Design of a Statically Indeterminate Arch

Try these first

1. 1.

   What is a two-hinged arch?

   Hint

   Think about the supports and how they enable movement.

2. 2.

   What types of loads must be accounted for in arch design?

   Hint

   Consider permanent and temporary loads on the structure.

3. 3.

   What is the primary structural function of a two-hinged arch?

   • To carry compressive loads
   • To transfer tensile loads
   • To resist torsion

   Hint

   Think about how arches are shaped and used.

4. 4.

   True or False: The total load in a two-hinged arch includes only the weight of the structure.

   • True
   • False

   Hint

   Reflect on design considerations for structures.

5. 5.

   Design a two-hinged arch rib of 150 ft span and 30 ft rise for a new hangar. Calculate the concentrated load acting on each segment given total loading conditions.

   Hint

   Use the relationship of height and loading to find each segment load.

6. 6.

   Assess the adequacy of a 200 ft span arch rib with a moment of inertia that varies continuously along its length. What checks need to be performed?

   Hint

   Check how moments change along the length of the arch make use of provided tables in design assignments.