Structure Analysis II. Analysis of statically Indeterminate structures by the Force Method Part 1. Review Conjugate beam method. Conjugate-Beam Supports. Review Example 1. Find the deflection at Point B. Review Example 2. Find the deflection at Point C. Determinacy & Stability.
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Find the deflection at Point B
Find the deflection at Point C
Determinacy: when all the forces in structure can be determined from equilibrium equation , the structure is referred to as statically determinate. Structure having more unknown forces than available equilibrium equations called statically indeterminate
If n is number of structure parts & r is number of unknown forces:
r = 3n, statically determinate
r > 3n, statically indeterminate
Determine the reaction at the roller support B of the beam shown
Determine the reaction at the roller support B of the beam shown, the support B settles 1.5 in
Determine the moment at fixed wall for the beam shown
Conjugate beam method