ME 212 Lecture Notes - Lecture 8: Statically Indeterminate, European Route E70, Compressive Stress
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When the reactive forces or the internal resisting forces over a cross section exceed the number of independent equations of equilibrium, the structure is called statically indeterminate. These cases require the use of additional relations that depend on the elastic deformations in the members. A steel bar 50 mm in diameter and 2 m long is surrounded by a shell of a cast iron 5 mm thick. Compute the load that will compress the combined bar a total of 0. 8 mm in the length of 2 m. for steel, e = 200 gpa, and for cast iron, e = 100 gpa. A reinforced concrete column 200 mm in diameter is designed to carry an axial compressive load of 300 kn. Determine the required area of the reinforcing steel if the allowable stresses are 6 mpa and 120 mpa for the concrete and steel, respectively. Eco = 14 gpa and est = 200 gpa.
