Advances in Steel/FRP–Concrete Composite Structures: Analysis, Design and Application

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Structures".

Deadline for manuscript submissions: closed (10 August 2024) | Viewed by 5047

Special Issue Editors


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Guest Editor
Earthquake Engineering Research & Test Center, Guangzhou University, Guangzhou 510006, China
Interests: steel-concrete composite structures; ultra-high-performance concrete (UHPC); accelerated bridge construction (ABC); interfacial shear behavior; nonlinear behavior of composite structures
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Guest Editor
School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
Interests: prestressed/precast concrete structures; novel steel–concrete structures; UHPC materials and structures; shear behavior of concrete structures; retrofitting/rehabilitation of concrete structures
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
Interests: steel–concrete composite bridges based on high-performance materials; rehabilitation of deficient bridges with ultra-high-performance concrete; application of high-performance and energy-efficient materials in bridge engineering

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Guest Editor
Guangdong Key Laboratory of Earthquake Engineering & Applied Technique, Guangzhou University, Guangzhou 510006, China
Interests: steel/FRP–concrete composite structures; civil engineering technology based on high-performance construction materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Steel/FRP–concrete composite structures have attracted worldwide attention in the past decades, owing to their advantages of easy construction, outstanding structural performance and better environmental benefits. Recently, innovative forms of steel/FRP–concrete composite structures have been extensively investigated to meet the requirements of high-rise buildings, long-span bridges, long tunnels and other complicated structures. We are calling for paper submissions to this Special Issue entitled ‘Advances in Steel/FRP–Concrete Composite Structures: Analysis, Design and Application’ to be published in Buildings. This Special Issue aims to give an overview of the most recent innovations and advances in the field of steel/FRP–concrete composite structures and their applications. Original theoretical research, experimental work, case studies and comprehensive review papers are encouraged to be submitted. Topics relevant to this Special Issue include, but are not limited to, the following:

  • Innovative steel/FRP–concrete composite structures;
  • Novel construction technology of composite structures;
  • Composite structures containing high-performance materials, e.g., ultra-high-performance concrete (UHPC) and engineering cementitious composites (ECC), etc.;
  • Intelligent analysis of composite structures;
  • Experimental research on composite structures;
  • Design methodology of composite structures;
  • Nonlinear finite element analysis of composite structures.

Dr. Zhuangcheng Fang
Prof. Dr. Haibo Jiang
Dr. Shaohua He
Dr. Shu Fang
Guest Editors

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Keywords

  • steel–concrete composite structures
  • FRP–concrete composite structures
  • structural performance analysis
  • structural health monitoring
  • construction technology
  • machine learning
  • numerical simulation

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Published Papers (5 papers)

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Research

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32 pages, 12599 KiB  
Article
Shear Behavior of Non-Stirrup Ultra-High-Performance Concrete Beams: Contribution of Steel Fibers and UHPC
by Bowen Deng, Lifeng Zhang, Shengze Wu, Haibo Jiang, Yueqiang Tian, Junfa Fang and Chengan Zhou
Buildings 2024, 14(9), 2705; https://doi.org/10.3390/buildings14092705 - 29 Aug 2024
Viewed by 550
Abstract
The shear stirrups and bend-up reinforcement in ultra-high-performance concrete (UHPC) beams could potentially be excluded due to the superior mechanical properties of UHPC. This paper reports the new findings of an experimental research into the factors that influence the shear behavior of non-stirrup [...] Read more.
The shear stirrups and bend-up reinforcement in ultra-high-performance concrete (UHPC) beams could potentially be excluded due to the superior mechanical properties of UHPC. This paper reports the new findings of an experimental research into the factors that influence the shear behavior of non-stirrup UHPC beams. Fourteen beams were tested in shear, comprising twelve non-stirrup UHPC beams and two normal concrete (NC) beams reinforced with stirrups. The test variables included the steel fiber volume content (2.0%, 1.5%, and 0%), the shear span-to-effective-depth ratio (1.2, 1.8, 2.0, and 3.1), beam width (150 mm and 200 mm), and beam height (300 mm, 350 mm, and 400 mm). The results demonstrated that the steel fiber volume content had a significant influence on the shear behavior of the non-stirrup UHPC beams. The failure modes of the beams without steel fibers were typically brittle, whereas those reinforced with steel fibers exhibited ductile failure. The shear resistance of the beams could be significantly enhanced by the addition of steel fibers in the concrete mix. Furthermore, the post-cracking load-bearing performance of the beams could also be markedly improved by the addition of steel fibers. In addition, the shear span-to-effective-depth ratio had a considerable impact on the failure mode and the ultimate shear strength of the tested beams. The contribution of steel fibers to the shear capacity of the UHPC beams was observed to increase as the shear span-to-effective-depth ratio increased. The French standard formulae tended to overestimate the contribution of steel fibers, and the calculation results were found to be more accurate for UHPC beams with a moderate shear span-to-effective-depth ratio (around 2.0). Moreover, the French standard formulae demonstrated greater accuracy at a larger beam height for calculating the contribution of UHPC matrix. Full article
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18 pages, 15616 KiB  
Article
Assessment of Glass-Fiber-Reinforced Polymer (GFRP)–Concrete Interface Durability Subjected to Simulated Seawater Environment
by Deliang Ma, Jie Liu, Libin Wang and Qiudong Wang
Buildings 2024, 14(6), 1732; https://doi.org/10.3390/buildings14061732 - 9 Jun 2024
Viewed by 673
Abstract
Fiber-reinforced polymer (FRP)-retrofitted concrete structures are extensively utilized, and they have attracted growing research interest due to their combined performance in marine environments. To investigate the effect of seawater exposure, a total of 20 single-shear GFRP (glass-FRP)-bonded concrete structures were tested. Three corrosion [...] Read more.
Fiber-reinforced polymer (FRP)-retrofitted concrete structures are extensively utilized, and they have attracted growing research interest due to their combined performance in marine environments. To investigate the effect of seawater exposure, a total of 20 single-shear GFRP (glass-FRP)-bonded concrete structures were tested. Three corrosion conditions, i.e., exposure to single-salinity and triple-salinity seawater through wet–dry cycles as well as continuous immersion in triple-salinity seawater, were simulated and tested. The minimum shear strength (13,006 N) was tested using specimen B150-T-DW-90, which was cured in triple-salinity seawater with wet–dry cyclic exposure. The results of the shear strengths, load–displacement curves, interfacial shear stresses, and fracture energies indicated that seawater exposure degraded the bonding strength of the GFRP–concrete interface. Notably, the wet–dry cycles in triple-salinity seawater resulted in the most significant interface degradation, which could exacerbate with prolonged exposure. By introducing a parameter, the residual coefficient α, a new strength calculation model for GFRP–concrete exposed to a seawater environment was proposed and discussed. Full article
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19 pages, 10083 KiB  
Article
Optimization of the Mechanical Properties of Bolted Connections between Concrete-Filled Tubular Columns and Steel Beam with Reinforcing Rings
by Zhicheng Pan, Fanjun Ma, Bing Cao, Zongyun Mo, Jing Liu, Ruoli Shi and Zhijian He
Buildings 2024, 14(3), 782; https://doi.org/10.3390/buildings14030782 - 13 Mar 2024
Cited by 1 | Viewed by 1431
Abstract
To study the mechanical performance of bolted connections with different structural forms of reinforced rings, based on the results of monotonic loading tests on two bolted connections between a concrete-filled steel tubular column and a steel beam with an outer reinforcing ring, this [...] Read more.
To study the mechanical performance of bolted connections with different structural forms of reinforced rings, based on the results of monotonic loading tests on two bolted connections between a concrete-filled steel tubular column and a steel beam with an outer reinforcing ring, this article uses ABAQUS v.2020 software to establish a three-dimensional refined finite element analysis model of such connections using appropriate constitutive models for concrete and steel. Subsequently, the effect of the dimensions of the steel beam, reinforcing ring, and cover plate on the load-bearing properties and the failure mechanism of the connections is investigated, and the numerical model is consistent with the verification test results. Then, the numerical simulations comparing bolted exterior reinforced rings under seven different construction measures (i.e., number of bolts, stiffeners) based on a conventional welded exterior reinforced rings with rigid connections (i.e., CGJ) are standardized. The research results indicate that when four rows of bolts are introduced on exterior reinforced rings, the web of steel beam is welded with stiffeners, and the top and bottom reinforced rings are also added with stiffeners; this bolted connection with an external reinforcing ring (i.e., GZ-7) can achieve the rigidity and load-bearing capacity of a fully welded external reinforcing ring rigid connection. At the same time, the reinforcing ring plate is bolted to the flange of the steel beam, and the force transmission path at the connection is changed to avoid the brittle fracture easily caused by the welded flange joints. It is also in line with the development trend of sustainable construction of “assembly” and “disassembly”. Full article
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13 pages, 4182 KiB  
Article
Experimental Investigation on the Axial Loading Performance of Grooving-Damaged Square Hollow Concrete-Filled Steel Tube Columns
by Jing Liu, Zimao Pan, Zhicheng Pan, Shaohua He and Wenzhuo Yu
Buildings 2024, 14(1), 87; https://doi.org/10.3390/buildings14010087 - 28 Dec 2023
Cited by 1 | Viewed by 872
Abstract
Under the influence of material defects, structural grooving, environmental corrosion, and other factors in engineering, concrete-filled steel tubes incur local defects on their external surfaces that affect their structural integrity and service life. This work conducts axial compression tests on 10 grooving-damaged square [...] Read more.
Under the influence of material defects, structural grooving, environmental corrosion, and other factors in engineering, concrete-filled steel tubes incur local defects on their external surfaces that affect their structural integrity and service life. This work conducts axial compression tests on 10 grooving-damaged square hollow concrete-filled steel tube (SHCFST) columns to investigate the effect of grooving damage on their axial compressive ultimate bearing capacity and the effect of steel tubes on concrete confinement. It explores the effects of three parameters, namely, the length of grooves, presence of slots in internal and external steel tubes, and orientation of grooves, on structural static performance. This study analyzes the loading, failure mechanisms, and axial compressive ultimate bearing capacity of grooving-damaged SHCFST columns. Results indicate that grooving weakens the steel tube’s confinement effect on the concrete core, reducing the axial compressive ultimate bearing capacity of specimens. On the basis of this experimental research, a method for calculating the axial compressive ultimate bearing capacity and axial compressive stiffness of grooving-damaged SHCFST columns is proposed. The calculation results closely align with experimental outcomes, providing valuable insights for related scientific research and engineering applications. Full article
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22 pages, 12054 KiB  
Essay
Study on Axial Compression Performance of Corroded Reinforced Concrete Columns Strengthened by Concrete Canvas and Carbon Fiber Reinforced Plastic under Secondary Corrosion
by Fengge Li, Chen Chen and Zehui Xiang
Buildings 2024, 14(3), 803; https://doi.org/10.3390/buildings14030803 - 15 Mar 2024
Cited by 1 | Viewed by 919
Abstract
To investigate the effects of concrete canvas (CC) and carbon fiber reinforced plastic (CFRP) reinforcement on the mechanical properties of corroded reinforced concrete columns (compressive strength, flexure strength, strength of extension, and so on), 42 columns in four groups were designed and axial [...] Read more.
To investigate the effects of concrete canvas (CC) and carbon fiber reinforced plastic (CFRP) reinforcement on the mechanical properties of corroded reinforced concrete columns (compressive strength, flexure strength, strength of extension, and so on), 42 columns in four groups were designed and axial compression experiments were carried out. For the corroded reinforced concrete columns reinforced with CC and CFRP, the effects of initial corrosion rate (5%, 10%), secondary corrosion time (15 d, 30 d), number of CC layers (0, 1), and number of CFRP layers (1, 2, 3) on the failure morphology, load carrying capacity, and ductility of concrete columns were analyzed. The test results show that the properties of the single layer CC confined specimens are improved to a certain extent, and the ductility properties are enhanced. The properties of the CC–CFRP composite constrained specimens are greatly improved, the plastic deformation ability is enhanced, and the typical ductile damage characteristics are shown. The corrosion inhibition of CC for specimens with a theoretical corrosion rate lower than 20% showed an increasing trend, and the corrosion inhibition rate ranged from 23.0% to 31.2%. CC and CFRP restrain the concrete jointly, hindering the expansion inside the concrete, and the peak strain of the joint restraint specimen itself changes greatly, while the overall peak strain of the corrosion specimen is very small under the action of the joint steel bar. Finally, according to the existing peak stress–strain model and the experimental data in this paper, a peak stress–strain model suitable for corroded reinforced concrete columns is established. The established calculation model has a high accuracy, which provides a certain theoretical basis for subsequent research. Full article
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