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Updated: May 25, 2025
11:07
Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
Published on: June 27, 2018
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Flexural Performance Analysis of Composite Beam with Reinforced HPFRCC Precast Shell
Tingting Lu1, Yuxiang Wen1, Kai Guan1
1Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi'an 710123, China.
Materials (Basel, Switzerland)
|February 26, 2025
Summary
High-Performance Fiber Reinforced Cementitious Composite (HPFRCC) beams show improved mechanical properties. These R/HPFRCC beams offer greater flexural bearing capacity and integrity compared to traditional reinforced concrete beams.
Area of Science:
- Civil Engineering
- Materials Science
Background:
- Traditional reinforced concrete (RC) beams have limitations in mechanical properties.
- Precast composite beams offer advantages but can be further enhanced.
Purpose of the Study:
- To investigate the flexural performance of precast composite beams using High-Performance Fiber Reinforced Cementitious Composite (HPFRCC) shells.
- To compare the mechanical properties of R/HPFRCC beams with conventional RC beams.
Main Methods:
- Designed and tested nine R/HPFRCC precast shell composite beams under four-point bending.
- Varied reinforcement ratios, post-longitudinal reinforcement treatment, mold shell materials, and loading methods.
- Analyzed flexural bearing capacity, failure modes, deformation, and influencing factors.
Main Results:
- R/HPFRCC beams demonstrated superior mechanical performance and integrity.
- Yield and peak loads increased by 6.6% and 10.3% respectively compared to RC beams.
- HPFRCC reduced damage and delayed longitudinal reinforcement yielding due to smaller strain.
Conclusions:
- Replacing ordinary concrete with HPFRCC in precast shells significantly enhances composite beam performance.
- A validated calculation model for the ultimate load-carrying capacity of R/HPFRCC beams was developed.
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