Affiliation:
1. School of Civil Engineering, Xijing University, Xi’an 710123, China
Abstract
To enhance the mechanical properties and damage resistance of prefabricated monolithic composite beams, this study introduces HPFRCC precast mold shells as a replacement for ordinary concrete in the construction of prefabricated monolithic composite beams. These HPFRCC precast mold shell prefabricated monolithic composite beam members are then subjected to experimental investigations to analyze their flexural properties. The results of the study indicate that the U–shaped HPFRCC precast mold shell exhibits excellent bonding with the post-cast concrete, with no significant peeling observed. Moreover, compared to ordinary cast-in-place monolithic RC beams, the HPFRCC/RC prefabricated monolithic composite beams demonstrate a 17.2% increase in peak load and a 24.55% increase in yield load. Similarly, the HPFRCC/RC prefabricated monolithic composite beams show an 8.1% increase in peak load and a 5.59% increase in yield load compared to ordinary RC composite beams. In comparison to both ordinary cast-in-place monolithic RC beams and ordinary RC composite beams, the cracks observed in the HPFRCC/RC prefabricated monolithic composite beams are denser and finer, with a smaller crack development rate and width. These findings suggest that the incorporation of HPFRCC materials improves the damage resistance of the beam members.
Funder
Natural Science Basic Research Program of Shaanxi
Shaanxi Provincial Department of Education Youth Innovation Team Construction Research Plan Project
Xijing University Senior Talent Fund
Subject
Building and Construction,Civil and Structural Engineering,Architecture
Reference17 articles.
1. Experimental study on the flexural behavior of ECC and ECC-concrete composite beams hybrid reinforced with steel and FRP bars;Yuan;Concrete,2022
2. Flexural behavior of prefabricated composite beam with cast-in-situ UHPC: Experimental and numerical studies;Shi;Structures,2022
3. Flexural Strengthening of RC Beams with Cement-Based Composites;Focacci;J. Compos. Constr.,2011
4. Calabrese, A.S., D’Antino, T., Colombi, P., Carloni, C., and Poggi, C. (2020). Fatigue Behavior of PBO FRCM Composite Applied to Concrete Substrate. Materials, 13.
5. Calabrese, A.S., D’antino, T., Colombi, P., Carloni, C., and Poggi, C. (2021, January 8–10). Fatigue Behavior of FRCM Strengthened RC Beams: State of the Art and Future Developments. Proceedings of the 10th International Conference on FRP Composites in Civil Engineering, Istanbul, Turkey.