2022 TDA 1-1 COMPLETED
Release time: 2024/07/17 Publisher： original Views：
Comprehensive Promotion and Improvement of FRP Reinforced Composite Materials and Engineering Structural Members
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Liu Tianqiao Beijing University of Technology |
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Project Background：
Fiber reinforced polymer (FRP) composites, owing to their advantages of lightweight, high strength- and stiffness-to-weight ratios, excellent corrosion resistance and superior fatigue performance, have shown great potential in the field of civil engineering worldwide. Nonetheless, due to low modulus of elasticity, lack of robust connection method, significant brittle sudden failure mode, poor fire resistance, and uncertainty in creep performance, FRPs have not been universally-accepted in practice. This is manifested by the facts that the civil engineers tending to adopt FRPs do not have full confidence in the material, and those engineers who have the confidence in material do not have sufficient skills of designing with FRPs.
Aims & Goals:
1. To propose 1 or 2 FRP joint nodes with pultrusion process;
2. To develop fiber composite rebar with good ultimate tensile strain and post yield strain;
3. To develop composite profiles with high in-plane shear strength and equivalent tensile strength;
4. To enhance the overall performance of composite structural parts with high efficiency of material strength and high ductility factor at the ultimate state;
5. To reach fire protection grade B1 and fire resistance limit of the horizontal load-carrying parts ≥1 h;
6. To develop design methods for highly-ductile composite structure parts.
Outcomes:
1. Deveoled the enhance technology of modulus of elasticity of high-performance glass and carbon fibers in pultruded FRP composites, GFRP and CFRP can reach 66 GPa and 167 GPa.
2. Deveoled an elastic-plastic mid-span deviators for prestressing CFRP strengthening, avoided premature brittle failure of the CFRP plate.
3. A new test method standard, entitled 'Tensile Properties of Pultruded Fiber Reinforced Polymer Composites - Using A Dual-Tapered Specimen', was proposed to measure the tensile properties of pultruded FRP composites having high-strength and large thickness.
PAPER 1: 'Analysis-oriented model for FRP tube-confined concrete: 3D interpretation of biaxial tube behaviour'
Engineering Structures, 2022, 272: 114987
DOI: https://doi.org/10.1016/j.engstruct.2022.114987
PAPER 2: 'Strengthening RC beams with mid-span supporting prestressed CFRP plates:
An experimental investigation'
Engineering Structures, 2022, 272: 115022
DOI: https://doi.org/10.1016/j.engstruct.2022.115022
PAPER 4: 'A binary resin system of epoxy and phenol-formaldehyde for improving the thermo-mechanical behavior of FRP composites'
PAPER 3: 'Application of ultra-lightweight and large-scale pultruded for external frame beam in high-rise buildings' (in Chinese)
Composites Science and Engineering, 2023, (1): 100-106
DOI: 10.19936/j.cnki.2096-8000.20230128.012
PAPER 4: 'A binary resin system of epoxy and phenol-formaldehyde for improving the thermo-mechanical behavior of FRP composites'
Construction and Building Materials, 2023, 389: 131790
DOI: https://doi.org/10.1016/j.conbuildmat.2023.131790
PATENT 1: A fire- and flame-retardant pultruded fiber reinforced composite and its manufacturing method (filed)
PATENT 2: A fire-retardant pultruded fiber reinforced composite profile (granted)
DEMONSTRATION 1: Pultruded GFRP external frame beam in high-rise buildings by Beijing University of Technology
DEMONSTRATION 1: Pultruded GFRP external frame beam in high-rise buildings by Beijing University of Technology
