In the force method, what compatibility condition is imposed after selecting the redundant forces?
Correct answer: A. The calculated displacement must equal the prescribed displacement
- A. The calculated displacement must equal the prescribed displacement
- B. The released structure must remain completely rigid
- C. The redundant force must equal the support reaction
- D. The bending moment must vanish at every released coordinate
Explanation
The redundant forces are found by enforcing compatibility between the calculated and prescribed displacements. For an originally fixed support, the prescribed displacement is commonly zero, but it may be a known settlement or rotation.
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