Civil engineeringLesson 1 of 2 in the course Structural analysis

Structural Analysis: Loads, Trusses, and Finite Element Methods

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

Structural analysis helps engineers predict how structures respond to forces before they are built or tested. This lesson introduces what counts as a structure, how structural systems are classified, and the main categories of loads they must support.

Structural analysis is a branch of solid mechanics that uses simplified models—such as bars, beams, and shells—to determine how loads affect structures and their components. It draws on applied mechanics, materials science, and applied mathematics.

All flashcards

What is structural analysis?
A branch of solid mechanics that models how loads affect structures and their components.
How do dead loads differ from live loads?
Dead loads are permanent weights; live loads vary in magnitude, position, or both.
What is the method of joints?
A truss-analysis method that applies force equilibrium at individual joints.
What is the method of sections?
A truss-analysis method that cuts through members to find selected forces.
What is the finite element method?
A numerical method that approximates a structure as connected elements and nodes.

Quiz questions

  1. How does the finite element method represent a continuous structure?Answer: As elements connected at nodes in a finite assembly.
  2. How does the method of joints analyze a truss?Answer: It isolates joints and applies force equilibrium at each one.
  3. For a planar truss, how many unknown member forces does a useful section generally cut through at most?Answer: Three unknown member forces.
  4. What does a constitutive relation describe in structural analysis?Answer: How a material links quantities such as stress and strain.
  5. A truss member force is calculated as negative after a direction was assumed. What does the sign indicate?Answer: The actual force direction is opposite to the assumed direction.

Based on the Wikipedia article Structural analysis, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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