Mechanical Performance of Ultralightweight Cement Composite-Filled CFRP-Wrapped Steel Tube Arches with Compression-Yield Systems
Publication: Journal of Composites for Construction
Volume 28, Issue 5
Abstract
One of the main barriers to the acceptance and adoption of fiber-reinforced polymers (FRPs) in structural engineering is the brittle failure mode and limited ductility caused by the elastic-brittle behavior of FRP materials. Introducing a compression-yield (CY) system is a promising way to improve the ductility of the structures. This study adopted perforated steel cylinders as CY systems. Six perforated steel cylinders with different parameters were tested, and the applicability of the existing constitutive model on the perforated steel cylinders was verified. A design approach for perforated steel members on the structures was proposed. Based on the proposed design approach, ultralightweight cement composite (ULCC)-filled carbon fiber-reinforced polymer (CFRP)-wrapped steel tube arches with perforated steel cylinders were designed and experimentally investigated. The ULCC-filled CFRP-wrapped steel tube arches with CY systems achieved high ductility while maintaining favorable bearing capacity. A model was then proposed to evaluate the damage degree of the structures based on the longitudinal strain in the CY system. The damage development of the structures can be detected based on the measurement of the CY system, which enables early warning to be provided before structural failure.
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Data Availability Statement
All data, models, and codes generated or used during the study appear in the published article.
Acknowledgments
Financial supports are from the National Natural Science Foundation of China (Grant Nos. 52325804, 52308184, and 52378170), NSFC and Guangdong Province (Grant No. U2001226), and Shenzhen Science and Technology Innovation Commission (Grant Nos. JCYJ20210324095003010 and 20220810164450001).
Notation
The following symbols are used in this paper:
- b
- width of the perforated steel block (mm);
- C
- horizontal distance of hole in the perforated steel member (mm);
- D
- diameter of the hole in the perforated steel member (mm);
- E1
- elastic modulus of the perforated steel member (MPa);
- Es
- elastic modulus of the steel material (MPa);
- f
- shape coefficient of the perforated steel member;
- fy
- yield strength of the steel material (MPa);
- H
- horizontal distance of the hole in the perforated steel member (mm);
- h
- hole layout coefficient of the perforated steel member;
- k1
- elastic modulus of the perforated steel member (MPa/%);
- k2
- initial stiffness of the strain-hardening stage of the stress–strain curve of the perforated steel member (MPa/%);
- k3
- stiffness of the stable stage of the stress–strain curve of the perforated steel member (MPa/%);
- L
- perforated steel block length (mm);
- L0
- solid segment length at member’s end (mm);
- l0
- ratio of the solid segment length to the perforated steel block length;
- m
- hole number at the first layer of the perforated steel member;
- n
- maximum hole number with one layer of the perforated steel member;
- r
- void ratio of the perforated steel member;
- ɛ
- longitudinal strain in the CY system (%);
- ɛsy
- yield strain of the steel material (%);
- ɛy
- yield strain of the CY system (%);
- λ
- ratio of yield strength to ultimate strength of the CY system;
- σu
- ultimate strength of the CY system (MPa);
- σy
- yield strength of the CY system (MPa); and
- ϕ
- wedge-shape coefficient of the perforated steel member.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 28 • Issue 5 • October 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Nov 1, 2023
Accepted: Jun 6, 2024
Published online: Jul 25, 2024
Published in print: Oct 1, 2024
Discussion open until: Dec 25, 2024
ASCE Technical Topics:
- Carbon fibers
- Columns
- Composite materials
- Cylinders
- Engineering fundamentals
- Engineering materials (by type)
- Fiber reinforced composites
- Fiber reinforced polymer
- Fibers
- Geometry
- Materials engineering
- Mathematics
- Polymer
- Steel columns
- Steel fibers
- Structural engineering
- Structural members
- Structural systems
- Synthetic materials
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