Chapter 3 - Analysis of Statically Determinate Trusses

Objectives

  • Classify a truss as simple, compound (type 1, 2 or 3) or complex.
  • Judge whether a truss is statically determinate/indeterminate.
  • Judge whether a truss is stable/unstable.
  • Calculate a truss's support reactions.
  • Visually identify any special joints in a truss.
  • Judge the most efficient method to determine the force in a truss member.
    • method of joints
    • method of sections
    • combination of methods
  • Calculate the force in a truss member using the method of joints.
  • Calculate the force in a truss member using the method of sections.

Quiz 1 Formula-Sheet Guidelines

One 8.5"x11" page with writing on both sides
NO worked problems
Tables 1-2, 1-3 and 1-4 and the wind-speed map (if needed) will be provided with quiz.
You may be asked to submit the formula sheet with the quiz.

Concepts

1. common types of trusses
2. classification of coplanar trusses 1-4
3. the method of joints
4. zero-force members 5-9
5. the method of sections
6. compound trusses
7. complex trusses
8. space trusses

Problems

* examples to be discussed in class

st: stability
de: determinacy
cl: classification

              7e
Examples
  7e
Homework
  Autodesk
Robot
 
planar
trusses


  st, de   03.001   solution*   --   --  
st, de   03.002   --   solution   --  
st, de   03.003   solution*   --   --  
  6 loads   03.004   solution*   solution   --  
  7 loads   03.005   solution*   --   solution  
  25 loads   03.006   solution*   --   model  
  17 loads   03.007   --   solution   solution  
  11 loads   03.008   solution*   solution   --  
  13 loads   03.009   solution*   --   solution  
  3 loads   03.010   solution*   --   --  
  3 loads   03.011   --   --   --  
  19 loads   03.012   --   --   solution  
  13 loads   03.013   --   solution   --  
  3 loads   03.014   --   --   solution  
  17 loads   03.015   --   --   solution  
  17 loads   03.016   --   --   solution  
  3 loads   03.017   --   solution   --  
  3 loads   03.018   --   solution   --  
  3 loads   03.019   --   --   solution  
    5 loads   03.020   --   --   --  
    5 loads   03.021   --   --   --  
    5 loads   03.022   --   --   solution  
    3 loads   03.023   --   --   --  
    3 loads   03.024   --   --   --  
    3 loads   03.025   solution*   --   solution  
    cl, st   03.026   solution*   --   solution  
    13 loads   03.027   --   --   --  
    cl, 3 loads   03.028   solution*   --   --  
    cl, 9 loads   03.029   --   solution   --  
    cl, 9 loads   03.030   --   solution   --  
    3 loads   03.031   --   --   --  
    5 loads   03.032   --   --   solution  
    19 loads   03.033   --   --   solution  
    21 loads   03.034   --   --   solution  
    11 loads   03.035   --   --   solution  
    3 loads   03.036   --   --   solution  
    3 loads   03.037   --   --   solution  
    3 loads   03.038   --   --   solution  
    3 loads   03.039   --   --   solution  
    3 loads   03.040   --   --   --  
    3 loads   03.041   --   --   --  
    3 loads   03.042   --   --   solution  
    4 loads   03.043   --   --   solution  
    3 loads   03.044   --   --   solution  
    9 loads   03.045   --   --   --  
    21 loads   03.046   --   --   --  
    9 loads   03.047   --   --   --  
  space
trusses
  6 loads   03.048   --   --   model  
    10 loads   03.049   --   --   --  
    14 loads   03.050   --   --   --  
    3 loads   03.051   --   --   --  
    8 loads   03.052   --   --   --  
    6 loads   03.053   --   --   --  
    3 loads   03.054   --   --   --  
    3 loads   03.055   --   --   --  
    3 loads   03.056   --   --   --  
    3 loads   03.057   --   --   --  
    4 loads   03.058   --   --   --  
    st, 9 loads   03.059   --   --   --