Structural engineering theory: Difference between revisions

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[[File:bolt-in-shear.PNG|thumb|right|Figure of a [[Screw|bolt]] in [[Shear stress|shear]]. Top figure illustrates single shear, bottom figure illustrates double shear.]]

[[Structural engineering]] depends upon a detailed knowledge of [[Structural load|loads]], [[physics]] and [[Building material|material]]s to understand and predict how structures support and resist self-weight and imposed loads. To apply the knowledge successfully a structural engineerengineers will need a detailed knowledge of [[mathematics]] and of relevant empirical and theoretical [[design codes]]. They will also need to know about the [[corrosion]] resistance of the materials and structures, especially when those structures are exposed to the external environment.

The criteria which govern the design of a structure are either serviceability (criteria which define whether the structure is able to adequately fulfill its function) or strength (criteria which define whether a structure is able to safely support and resist its design loads). A structural engineer designs a structure to have sufficient [[Strength of materials|strength]] and [[stiffness]] to meet these criteria.

Loads imposed on structures are supported by means of forces transmitted through structural elements. These forces can manifest themselves as: [[Tension (physics)|tension]] (axial force), [[compression (physical)|compression]] (axial force), [[Shear stress|shear]], and [[bending]], or [[flexure]] (a bending moment is a force multiplied by a distance, or lever arm, hence producing a turning effect or [[torque]]).

*[[Tension (physics)|tension]] (axial force)

*[[compression (physical)|compression]] (axial force)

*[[Shear stress|shear]]

*[[bending]], or [[flexure]] (a bending moment is a force multiplied by a distance, or lever arm, hence producing a turning effect or [[torque]])

==Strength==