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1. Structural Element

   Linked via "steel rebar"

   The behavior of an element is often idealized by the primary stress state it resists:
   Compression Members: Elements predominantly subjected to axial force directed toward the center of mass. These are susceptible to buckling instability if the slenderness ratio exceeds critical thresholds. Concrete columns, often reinforced with steel rebar to manage tensile strains induced by secondary lateral loads, are prime examples.
   *Ten…

2. Tensional Stress

   Linked via "Steel rebar"

   Concrete and Reinforcement
   Concrete possesses very high compressive strength but extremely low tensile strength (typically $1/10$th of its compressive capacity). Consequently, structural elements designed to bear bending loads (which induce tension on one face) must be reinforced with materials capable of handling the tensile loads. Steel rebar is used because its yield strength ($\sigma_y$) in tension significantly exceeds that of concrete. The design r…