Parametric study on prestressed concrete-encased CFST subjected to bending using nonlinear finite element modeling

Rahmani, Zohreh; Naghipour, Morteza; Nematzadeh, Mahdi

doi:10.1007/s42107-020-00330-3

Cited by 5 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This element type was also applied to the stiffeners to ensure consistency in the modeling approach. The concrete components were represented using eight-node brick elements with reduced integration (C3D8R), in alignment with established modeling practices [45]. To achieve a detailed representation, elements measuring 20 mm in dimensions were selected for the modeling process [46].…”

Section: Figure 1 Sections and Stiffeners Placementmentioning

confidence: 99%

Stiffened T-Shape Concrete Filled Tubular Tall Columns Axial-Bending Interaction

Soleimanjoo,

Hajghassem,

Tadayon

et al. 2024

Preprint

View full text Add to dashboard Cite

The recent emergence of concrete-filled steel tube (CFST) columns represents a significant advancement in composite column technology. This innovative approach synergistically combines concrete and steel, where the steel tube acts as a confining medium that enhances the concrete's strength and ductility, while the concrete in turn mitigates the risk of both internal and local buckling in the steel tube. The primary benefits of CFST columns over traditional concrete columns include the elimination of the need for reinforcement and formwork, faster construction times, cost savings, reduced column dimensions, and improvements in load capacity, ductility, and energy absorption capabilities. This research investigates the impact of T-type steel stiffeners on the behavior of square CFST columns through numerical modeling. Utilizing the ABAQUS software, the study analyzed ten specimens to understand this effect comprehensively. A total of fifty CFST specimens reinforced with T stiffeners were modeled to assess varying parameters, such as wall thickness, stiffener depth, and steel grade, under axial loads and bending moments. For each specimen, a P-M (axial force-bending moment) diagram was generated. The outcomes of this analysis culminate in the proposal of an axial force-bending moment interaction diagram specifically for CFST columns reinforced with T stiffeners, providing valuable insights for the design and application of these columns in structural engineering.

show abstract

Section: Figure 1 Sections and Stiffeners Placementmentioning

confidence: 99%

Stiffened T-Shape Concrete Filled Tubular Tall Columns Axial-Bending Interaction

Soleimanjoo,

Hajghassem,

Tadayon

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…23,24 There has been extensive research on the compressive behavior of members including CFST and RC elements, but the flexural and shear behavior of these members have not been subject to a comprehensive study. [25][26][27][28][29][30][31][32] An et al conducted an experimental 33 and analytical 34 study of concrete-encased CFST eccentrically loaded columns. They concluded that CFST improved stiffness, ductility, and the ultimate strength of the section.…”

Section: Introductionmentioning

confidence: 99%

“…Concrete‐encased CFST exhibits higher confinement of the concrete core, high stiffness and strength, better durability and ductility, small sectional size, higher fire resistance due to the protection of the outer RC encasement compared to CFST, avoidance of local buckling and corrosion of steel tube, and easier connection with steel RC beams 23,24 . There has been extensive research on the compressive behavior of members including CFST and RC elements, but the flexural and shear behavior of these members have not been subject to a comprehensive study 25–32 …”

Section: Introductionmentioning

confidence: 99%

Structural behavior of prestressed self‐compacting concrete‐encased concrete‐filled steel tubes beams

Rahmani

Naghipour

Nematzadeh

2021

Structural Concrete

Self Cite

View full text Add to dashboard Cite

Concrete‐encased concrete‐filled steel tubes (CFST) has extensive applications in the world. According to previous researches, if the CFST is placed in the compression zone, the confinement increases, and the compressive capacity of the concrete is completely used. The prestressed strands also increase the core concrete confinement and eliminate tension cracks. Therefore, in this paper, to achieve the benefits of CFST and prestressed strand, for the first time, a novel concept called prestressed concrete‐encased CFST (PCE‐CFST) beams were introduced. The main objective of the combination of steel tube and pre‐stressed strands is to increase the core concrete compressive strength and control the concrete crack in the tension zone. Six beams were constructed using self‐compacting concrete to investigate the influence of variations in the pre‐stressing force level of the pre‐stressed strands, the pre‐stressed strands eccentricity, and the steel tubes diameter‐to‐thickness ratio on the structural performance of these members. The specimens were tested under four‐point loading. The results showed that the pre‐stressed strands increased the confinement effect on the core concrete and improved the bearing capacity, ductility, and bending stiffness. The steel tubes improved the bearing capacity, ductility, and energy absorption, while they did not significantly affect the bending stiffness. Finally, it was shown that the pre‐stressed strands increased the bearing capacity, energy absorption, and bending stiffness in reinforced concrete beams.

show abstract

Estimation of the axial capacity of high-strength concrete-filled steel tube columns using artificial neural network, random forest, and extreme gradient boosting approaches

Sarir,

Ruangrassamee,

Iwanami

2024

Front. Struct. Civ. Eng.

View full text Add to dashboard Cite

Parametric study on prestressed concrete-encased CFST subjected to bending using nonlinear finite element modeling

Cited by 5 publications

References 27 publications

Stiffened T-Shape Concrete Filled Tubular Tall Columns Axial-Bending Interaction

Stiffened T-Shape Concrete Filled Tubular Tall Columns Axial-Bending Interaction

Structural behavior of prestressed self‐compacting concrete‐encased concrete‐filled steel tubes beams

Estimation of the axial capacity of high-strength concrete-filled steel tube columns using artificial neural network, random forest, and extreme gradient boosting approaches

Contact Info

Product

Resources

About