What Is Working Stress Method

Working Stress Design Method Definition : Working Stress Design Method   is a method used for the  reinforced concrete design  where  concrete  is assumed as elastic, steel and concrete act together elastically where the relation ship  between loads and stresses is  linear . Assumptions of Working Stress Design Method Plane Section before bending will remain plane after bending Bond between steel and concrete is perfect with in elastic limit of steel The steel and concrete behaves as linear elastic material All tensile stresses are taken by reinforcement and none by concrete The stresses in steel and concrete are related by a factor known as “modular ratio The Stress-strain relationship of steel  and concrete is a Straight line under working load Limitations of working stress method : The assumptions of linear elastic behaviour and control of stresses within specially defined permissible stresses are unrealistic due to several reasons viz., creep, shrinkage and othe