Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 81, Number 3, February10 2022 , pages 305-316 DOI: https://doi.org/10.12989/sem.2022.81.3.305 |
|
|
|
Bond behavior between concrete and prefabricated Ultra High-Performance Fiber-Reinforced Concrete (UHPFRC) plates |
||
Walid Mansour, Mohammed A. Sakr, Ayman A. Seleemah, Bassam A. Tayeh and Tarek M. Khalifa
|
||
| Abstract | ||
| Externally bonded ultrahigh performance fiber-reinforced concrete (UHPFRC) is commonly used as a strengthening material for reinforced concrete (RC) structures. This study reports the results of an experimental program investigating the bonding behavior between concrete and prefabricated UHPFRC plates. The overall experimental program is consisting of five RC specimens, which are strengthened using the different lengths and widths of prefabricated UHPFRC plates. These specimens were analyzed using the pull-pull double-shear test. The performance of each strengthened specimen is presented, discussed and compared in terms of failure mode, maximum load, load-slip relationship, fracture energy and strain distribution. Specimen C-25-160-300 which bonded along the whole width of 160 mm recorded the highest maximum load (109.2 kN) among all the analysed specimens. Moreover, a 3D numerical finite element model (FEM) is proposed to simulate the bond behavior between concrete and UHPFRC plates. Moreover, this study reviews the analytical models that can predict the relationship between the maximum bond stress and slip for strengthened concrete elements. The proposed FEM is verified against the experimental program and then used to test 36 RC specimens strengthened with prefabricated UHPFRC plates with different concrete grades and UHPFRC plate widths. The obtained results together with the review of analytical models helped in the formation of a design equation for estimating the bond stress between concrete and prefabricated UHPFRC plates. | ||
| Key Words | ||
| bond stress-slip model; concrete; de-bonding, interface; finite element model (FEM); prefabricated plates; ultrahigh performance fiber-reinforced concrete (UHPFRC) | ||
| Address | ||
| Walid Mansour: Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University, Box 33511, Kafrelsheikh, Egypt Mohammed A. Sakr: Department of Structural Engineering, Tanta University, Tanta, Egypt Ayman A. Seleemah: Department of Structural Engineering, Tanta University, Tanta, Egypt Bassam A. Tayeh: Department of Civil Engineering Department, Faculty of Engineering, Islamic University of Gaza, Palestine Tarek M. Khalifa: Department of Structural Engineering, Tanta University, Tanta, Egypt | ||