Análisis resistencia al corte en vigas de hormigón armado y hormigón pretensado, con y sin armadura de cortante

Abstract

Shear cracking in concrete structures are very dangerous. This type of failure can rarely be predicted and often occurs suddenly without warning. For decades, there have been tests to study this phenomenon, in order to try to solve the enigma that is the shear. With the analytical obtained results in the design stage, were constructed and tested beams of concrete, with base and height of equal dimensions and compared the results of the test, with two building codes; ACI 318-14 and NEC 2015. For this, five series of beams were constructed: a) without longitudinal and transverse reinforcement, b) only with longitudinal reinforcing steel, c) longitudinal and transverse reinforcement steel (stirrups), d) longitudinal prestress reinforcement and e) longitudinal prestress and transverse reinforcement (stirrups); five series of beams were built, three of each series, a total of fifteen beams. Known approaches on shear strength in the literature are first analyzed and their accuracy checked by comparison with the assay values. Differences between arithmetic results and test values will be established by revising the formulas of the codes.