Presently, there is no reliable conclusion on the effect of grouting compactness on the mechanical behavior of a prestressed concrete structure. To study the influence of grouting compactness on the performance of prestressed concrete, the flexural behaviors of 8 prestressed beams fabricated by using different sheaths materials with grouting material of various compactnesses were studied experimentally, and the flexural bearing capacity and flexural stiffness of the prestressed beams were discussed. The results showed that the variation in the average strain along the beam height has a linear distribution. The load-deflection curves included two turning points, which indicate concrete cracking and steel yielding. The effect of grouting compactnesses on the early stage of beam cracking is small, but the effect becomes increasingly obvious after beam cracking. The distribution of cracks in the prestressed beams with fuller grouting is more concentrated compared to that of beams with lower grouting compactness; when the crack spacing is smaller, the beam ductility is reduced, and the bearing capacity is improved. The fracture resistance and overall bearing capacity of metal sheaths prestressed concrete beams are better than those of plastic sheaths prestressed concrete beams. However, the ductility of prestressed beams with plastic sheaths is better than that of prestressed beams with metal sheaths. A reference is provided for such prestressed concrete beams, but in practical engineering, the relevant parameters should be reevaluated because the number of studied samples is limited.
Flexural Performance of Prestressed Beams with Grouting Material of Various Compactnesses
KSCE J Civ Eng
KSCE Journal of Civil Engineering ; 24 , 8 ; 2419-2434
2020-08-01
16 pages
Article (Journal)
Electronic Resource
English
Shear Behavior of Corroded Post-Tensioned Prestressed Concrete Beams with Full/Insufficient Grouting
Springer Verlag | 2020
|Flexural Behavior of RC Beams with NSM Prestressed Helical Rib Steel Wire
Springer Verlag | 2023
|Flexural vibrations of the prestressed toroidal shell
TIBKAT | 1965
|Flexural Performance of Prestressed Composite Recycled Aggregate Slabs with Steel Tube Trusses
Springer Verlag | 2022
|