Read the summary and the most important questions on Statics of Structure

• Paragraph 2.1.2 - 3.1.1

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• What is the limited state of a structure that may not be exceeded?

  Allowable load

• When is a body called a structure?

  When a body undergoes no significant translation or rotation, which is then in static equilibrium.

• What prevents a structure from moving and rotation?

  The action forces on the structure cause reaction forces.

• What is an unstable equilibrium?

  If an object, after a small deviation of the equilibrium position, does not return to its original position, and the deviation increases.

• When does an object appear to be in a stable equilibrium?

  If an object, after a small deviation, returns to its original position.

• What is an orthogonal dextrorotatory coordinate system?

  For the calculation of the internal load situation of a structure, the structure is set in an x-y-z coordinate system, with the axes that are perpendicular to each other. The positive directions of the axes are chosen such, that the system is dextrorotatory.

• What is the definition of the center line of a structure or structural element?

  This is an imaginary line connecting the gravity centers successive cross-sections of the beam.

• What is the distinction between a global and local coordinate system?

  A global orthogonal system defines the geometry of the complete structure with coordinates.
  A local  orthogonal coordinate system defines the geometry of structural elements with coordinates. The center line of every linear structural element is the x-axis.

• When is a structure 2-dimensional?

  - The center lines of the structural components are in one plane
  - The lines of action of the forces are in the plane of the structure
  - The deflections of the structural components are exclusively in the plane of the structure

• The nature of the load is distinguished into a number of categories:

  - Permanent load (Self-weight)
  - Live load (Non-permanent)
  - Accidental load (Can cause damage)