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UNIVERSITY OF CALIFORNIA, BERKELEY
Dept. of Civil and Environmental Engineering
Spring Semester 2008
Instructor: Filip C. Filippou
CE 121 – Advanced Structural Analysis
Homework Set #9 (due April 4, 2008)
1.
Problem (5 points)
The truss model in the following figure is the same as the model used in Examples 1 and 8 of the
CE121 classnotes. Thus, you are welcome to use the equilibrium and compatibility equations
directly without rederiving them. All truss elements have the same axial stiffness of EA=10,000
units. You are asked to
1.
Determine the basic element forces for the two applied forces separately. What do you
observe about the force values for each load case? (note the symmetry in geometry of the
truss model).
2.
Determine the element deformations of the truss elements for each load case separately.
3.
Determine the horizontal translation of node 4 and the vertical translation of node 2 for each
load case separately. What do you observe?
4.
Draw the deformed shape of the truss model under the combined loading.
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 Fall '09
 filippou
 Environmental Engineering

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