Recuperação estrutural de vigas de concreto armado.

Abstract

After planning the 6 chapters for the assembly of my dissertation, a comprehensive review was carried out to describe the structural recovery techniques of bending reinforced concrete beams or shear, showing advantages and disadvantages that allow choosing a good structural recovery within the existing one. The partial jacketing technique was developed to combat flexion, through Santos (2006), where 4 beams were used for experimental purposes, 2 reference beams that were called (REF1 and REF2), and 2 reinforced beams (VR1 and VR2) to partial bending, based on the beam (REF1), the tests were carried out and the results were found. Another very interesting study was carried out by Júnior (1997), with thin steel sheets glued to the sides of the beam with epoxy resin, to combat shear. Four reinforced concrete beams were prepared with the same tensile and compression reinforcement that were called VS1, VS2, VS3 and VS4 and with the same dimensions another one without stirrups that was called VSE (beam without stirrup). cracked until the first cracks resulting from shearing to load up to 50 KN appear. Subsequently, thin steel sheets were glued to the sides of beams VC1, VC2, VC3, and VC4, and after testing obtaining different results, it was possible to draw several graphs that are attached to the dissertation. A design was carried out to reinforce a bending beam using carbon fiber, the method described is iterative, starting with an arbitrary depth of the neutral line shown in subitem 4.37 and with the calculations of the deformations and stresses of the constituent elements of the structural element obtaining the value of the calculated neutral line, if the values converge from c (arbitrated) to c (calculated), the method was concluded. Finally, the dimensioning for the recovery of a reinforced concrete beam with the use of carbon fiber was developed, with the results found, it was possible to comment on the discussions and conclusions, as well as, the recommendations for future work in this highly relevant area.