The design philosophy of prestressed concrete bridges has been revised by the Indian Roads Congress (IRC), while introducing an integrated and comprehensive code (IRC:112-2011) for the design of concrete bridges based on the limit state philosophy. The revised edition of IRC:6-2014 (Section II) dealing with loads and stresses incorporates the partial safety factors for verification of structural strength and serviceability limit states. The new code lays emphasis on both strength and serviceability aspects of bridge decks and specifies the method of computation of ultimate strength, width of cracks and deflections at service loads
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