Axial Cyclic Testing of Concrete‐Filled Steel Tube Columns in Diagrid Structures

Shi, Qingxuan; Cai, Wenzhe; Wang, Bin

doi:10.1155/2019/4726029

Cited by 6 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After calculating the axial force and bending moment of each unit, the entire section is integrated to obtain the internal force of the section. On the basis of satisfying the balance of internal and external forces, the ultimate stability bearing capacity of the component is finally obtained by the iterative method [22,23]. is study first introduced the structural models of steel and concrete used and then explained the calculation principle and calculation process of the fiber model method.…”

Section: Fiber Model Analysis Methodmentioning

confidence: 99%

D‐Shaped Concrete‐Filled Steel Tube Structure in Bridge Engineering

Liu

Wang²,

Bi³

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

With the continuous progress of the construction industry, the requirements for concrete in the bridge engineering are getting higher and higher. This research mainly discusses the detection of D-shaped concrete-filled steel tube structure in bridge engineering. In this study, the D-shaped concrete-filled steel tube member was used as the research object, and the load-displacement curve of the D-shaped concrete-filled steel tube compression-bending member was analyzed by the fiber model program. In the determination of the bonding state of the concrete-filled steel tube interface, in order to avoid the impact of mechanical and manual vibrating and the difference in concrete pouring methods on the test, the study uses C60 self-compacting microexpansion concrete. While pouring the specimens, three sets of cube specimens with a side length of 100 mm are reserved to determine the mechanical properties of the concrete simultaneously. In the temperature shock measurement of the concrete-filled steel tube specimen, the concrete-filled steel tube specimen was placed in a resistance heater during the simulated heating stage and heated to 20°C, 40°C, 60°C, and 80°C at room temperature. When measuring the mechanical properties of the specimen under the axial load, the specimen is heated from room temperature to the temperature of the entire section to reach 20°C, 40°C, 60°C, and 80°C. After preloading, the load of each level is 10t for continuous operation. Load and record the strain of the steel pipe and concrete under each load. If only the radial effect of the steel tube on concrete is considered, the temperature of 11°C, 20°C, and 80°C is the best ambient temperature. The results show that the D-shaped steel tube concrete interface state can provide a certain theoretical and experimental reference for the optimization of the steel tube concrete interface, ensuring the long-term working performance of the steel tube concrete under the harsh environment.

show abstract

Section: Fiber Model Analysis Methodmentioning

confidence: 99%

D‐Shaped Concrete‐Filled Steel Tube Structure in Bridge Engineering

Liu

Wang²,

Bi³

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…Concrete-encased CFST columns are innovative components based on CFSTcolumns. At present, amounts of test and numerical analysis on CFST members have been reported [8][9][10][11][12], which showed high bearing capacity, high stiffness, and good seismic performance. When compared with CFST columns, concrete-encased CFST columns can not only avoid complicated treatment for corrosion and fire prevention but also have the advantage for the steel tube to pass through the frame joints easily.…”

Section: Introductionmentioning

confidence: 99%

Test on Hysteretic Behaviour of Prestressed Composite Joints with Concrete‐Encased CFST Columns

Wang

Luo

2019

Advances in Civil Engineering

View full text Add to dashboard Cite

Four composite joint specimens consisted of concrete-encased steel beams and concrete-encased concrete-filled steel tube (CFST) columns were tested under lateral cyclic loading, in which three specimens were prestressed and the other was not. In the tests, crack distributions and failure modes of the joint specimens were acquired, and the energy dissipation, rigidity degeneration, ductility, and residential deformation were investigated. Meanwhile, the strain variation of longitudinal rebars and I-steel flanges at beam ends as well as steel tubes in panel zones were analysed. The experimental results showed that a type of mixed mode consisting of shear failure in the panel zone and flexural failure at beam ends was found for three prestressed joint specimens, whilst only flexural failure at beam ends was observed for the non-prestressed one, and all joint specimens showed good hysteretic behaviour. In addition, as can be seen from the skeleton curves, the lateral peak loads of prestressed joint specimens could be enhanced to some extent by increasing the prestressing level, and the axial compression ratio had little effect on lateral loads; meanwhile, the ductility and energy dissipation for prestressed joint specimens also could be reduced by increasing the prestressing level and axial compression ratio.

show abstract

Seismic behavior and damage assessment of concrete‐filled steel tube columns in diagrid structures

Wang

Shi

Cai

2021

Structural Design Tall Build

View full text Add to dashboard Cite

Summary Diagrid structures have become an innovative and attractive choice for high‐rise buildings due to their high rigidity and esthetic appearance. Inclined concrete‐filled steel tube (CFST) columns, as the main load‐carrying members of diagrid structures, are supposed to be subjected to axial tension and compression loads. However, few studies have investigated the seismic behavior and damage assessment of CFST columns under axial cyclic loading. This study presents experimental results for eight circular CFST columns under axial cyclic loading. Based on the observed damage evolution, a damage assessment model for CFST columns subjected to axial cyclic loading was developed using a nonlinear combination of stiffness degradation and hysteretic energy dissipation. The contributions of the maximum response and cyclic loading effects to the damage were specified by introducing combination coefficients, which can be determined from a proposed equation based on the aspect ratio and confinement index of the CFST columns. Finally, the corresponding relationships between the range of the damage index and the degree of damage of CFST columns under different performance levels were established, which can provide the necessary basis for economic loss assessment and repair of earthquake‐damaged diagrid structures.

show abstract

Axial Cyclic Testing of Concrete‐Filled Steel Tube Columns in Diagrid Structures

Cited by 6 publications

References 17 publications

D‐Shaped Concrete‐Filled Steel Tube Structure in Bridge Engineering

D‐Shaped Concrete‐Filled Steel Tube Structure in Bridge Engineering

Test on Hysteretic Behaviour of Prestressed Composite Joints with Concrete‐Encased CFST Columns

Seismic behavior and damage assessment of concrete‐filled steel tube columns in diagrid structures

Contact Info

Product

Resources

About