Evaluation of shear design criteria of beams according to NBR6118 applying the modified compression field theory

Abstract It is known that design deficiencies in shear are more dangerous than bending, as failures can occur a fragile way and without possibility of redistributing internal forces. Unlike bending design, designing for loads by different standards generate significantly results the same element, long models have been under discussion many years. This paper analyses evaluation behavior combined reinforced concrete beams pairs these For this purpose, verification presented ABNT NBR 6118 was used compared to improved theory currently used, Modified Compression Field Theory - MCFT. able predict relationships specific strains, well strength sections with great precision, being parameterized several tested elements. As use not practical manual calculations, Response-2000 software, developed at University Toronto Evan C. Bentz, used. The program allows analysis columns subject moments, forces axial loads, any type geometry, material properties reinforcement arrangement, resulting accurate responses using MCFT basis.