Statically Indeterminate Structure Advantages

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SUMMARY

Statically indeterminate structures are prevalent in real-world applications due to construction methods, as seen in traditional European brick or stone houses. While statically determinate structures allow for straightforward calculations of internal and reaction forces based solely on geometry, they often require complex designs that can lead to aesthetic challenges, such as diagonal beams or triangular windows. The primary advantage of statically determinate structures lies in their ability to facilitate minimum weight designs, optimizing material usage while ensuring structural integrity.

PREREQUISITES
  • Understanding of structural engineering principles
  • Familiarity with statically determinate and indeterminate structures
  • Knowledge of material properties and their impact on design
  • Basic skills in structural analysis techniques
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  • Research design techniques for statically determinate structures
  • Explore the implications of material selection on structural integrity
  • Study the principles of structural optimization for minimum weight
  • Learn about the construction methods of traditional European buildings
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Structural engineers, architects, and students in civil engineering who are interested in the design and analysis of building structures.

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Hello,

I was wondering why it might be advantageous in some applications to create a structure that is statically indeterminate?

Thanks
 
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I would rather turn the question round. Most "real world" structures turn out to be statically indeterminate because of the way they are constructed, whether you like it or not. For example you can design the roof structure of a house using statically determinate trusses, but the walls of a traditional (european) house built from brick or stone are not statically determinate. Even with a modern steel-framed building, including the diagonal members that are needed to make a rigid statically determinate frame would be a problem, unless you like triangular windows, or beams running diagonally across the rooms, etc!

On the other hand statically determinate structures have one big advantage. The internal forces and reaction forces only depend on the geometry of the structure, and not what it is made from. So it is easy to design a "minimum weight" determinate structure: calculate the internal forces, and then use the least amount of material that will withstand them. (OK, that ignores the weight of the structure itself, but you get the general idea).
 

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