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Reinforcement Concrete || Compute the stresses in CRACKED SECTION(CHAPTER 4)

Sections designed for ultimate limit states (under factored loads) must be checked for serviceability (deflection, crack-width, etc.) under the expected 'service loads', as mentioned. The calculations require the computation of stresses under service loads. Moreover, these calculations form part of the working stress method of design (WSM). The basic assumptions involved in the analysis at the service load stage are summarised here. a) Plane sections normal to the beam axis remain plane after bending, is., in an initially straight beam, strain varies linearly over the depth of the section. b) All tensile stresses are resisted by the reinforcement, and none by concrete (except in the uncracked phase). c) Stresses are linearly proportional to strains - for both concrete and steel. d) The modular ratio, m = Es/Ec , has the value, 280/3σcbc The calculations for stresses under service loads are calculated here, using the linear elastic theory and the cracked-transformed section concept. Telegram Channel Link for pdf : t.me/civilengineeringstudies24