Axial compressive behavior of seawater sea-sand coral aggregate concrete-filled circular FRP-steel composite tube columns

Wang, Gaofei; Wei, Yang; Miao, Kunting; Zheng, Kaiqi; Dong, Fenghui

doi:10.1016/j.conbuildmat.2021.125737

Cited by 48 publications

(12 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pengujian terhadap 36 kolom SWSSC yang dikekang FRP menunjukkan bahwa FRP bagian dalam dan luar kolom mampu menunda tekuk lokal dari tabung baja. Selain itu, tabung FRP dapat meningkatkan daya dukung dan deformabilitas dari kolom CFST tersebut [12]. Perilaku tegangan-regangan dari 6 kolom CFST dengan berbagai ketebalan FRP akibat pembebanan aksial siklik menunjukkan, dengan bertambahnya jumlah lapisan FRP, performa FRP dalam memulihkan regangan, kondusif terhadap susut beton selama unloading dan secara efektif memperlambat perkembangan regangan plastis [13].…”

Section: Pendahuluanunclassified

Pengaruh Aplikasi Fibre Reinforced Polymer (FRP) terhadap Perkuatan Kolom Concrete Filled Steel Tube (CFT) menggunakan Metode Elemen Hingga

Saraswati

Suswanto²,

Habieb³

2022

JITS

View full text Add to dashboard Cite

Section: Pendahuluanunclassified

Pengaruh Aplikasi Fibre Reinforced Polymer (FRP) terhadap Perkuatan Kolom Concrete Filled Steel Tube (CFT) menggunakan Metode Elemen Hingga

Saraswati

Suswanto²,

Habieb³

2022

JITS

View full text Add to dashboard Cite

“…The mechanical performance of concrete has also been studied by many scholars, which shows that the bearing capacity and deformation of the structure are improved effectively when the concrete is in the state of triaxial compression (Ahmed et al, 2020;Wang et al, 2020;Wei et al, 2019a;Zheng & Wang, 2017). Concurrently, due to the superior tensile performance and energy dissipation of steel, the concrete-filled steel tube (CFST) column structure began to be investigated and applied in the middle of the nineteenth century (Stephens et al, 2018;Wang et al, 2022;Wei et al, 2022a;Zeng et al, 2017;Zong et al, 2005). The earliest engineering application of this structure was the pier of Severn Railway Bridge built in 1879 in the UK (Bradley & Roberts, 2010).…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Study of Concrete-Filled Steel Tube Columns Strengthened by FRP/Steel Strips Under Axial Compression

Shi-chang

Miao

Wei

et al. 2023

Int J Concr Struct Mater

Self Cite

View full text Add to dashboard Cite

Concrete-filled steel tube (CFST) columns are widely used in civil engineering because of their excellent bearing capacity; however, the reinforcement of CFST columns lacks effective measures. To strengthen CFST columns quickly and effectively, two methods, namely, winding FRP (fiber reinforced polymer) or steel strips, were explored in this work. Two unconfined CFST columns, eight FRP-strengthened CFST columns and four welded steel strip-strengthened CFST columns were manufactured and tested. The failure modes and axial load–strain curves of all specimens under compression load were concluded and compared. The effects of the primary parameters, such as FRP layers (1, 2, 3 and 4 layers) and steel strip thickness (3.0 and 6.0 mm), on the bearing capacity and deformation capacity were also investigated. The ultimate load of CFST columns increased from 28.72 to 64.16% after being confined by FRP with one to four layers. The ultimate load of the welded steel strip-strengthened CFST column with 3.0 mm steel strips and 6.0 mm steel strips increased by 28.46% and 49.82%, respectively, compared with the unconfined CFST column. Thus, the increase in FRP layers and steel strip thickness can markedly improve the compressive behavior of the FRP/welded steel strip-strengthened CFST columns. The cost performance of the two different reinforcement methods also showed that the cost of the welded steel strip-strengthened CFST column is nearly 40% of that of the FRP-strengthened CFST column when the same strengthening effect was obtained, which indicated that the welded steel strip-strengthened CFST column is more cost-efficient than CFST columns confined by FRP. Finally, six existing models for the ultimate load of FRP-strengthened CFST columns were presented and evaluated. From the evaluation results, the Zhang et al.’s model, Lu et al.’s model and Hu et al.’s model for FRP-strengthened CFST columns were shown to provide the best applicability and accuracy. Based on the Mander et al.’s model, a model for the ultimate load of welded steel strip-strengthened CFST columns was proposed and evaluated. The proposed model can accurately predict the ultimate load of welded steel strip-strengthened CFST columns.

show abstract

“…Guo et al [28] studied the effect of specimen size on the axial compressive properties of FRP-confined concrete columns. Wang et al [29], Wei et al [30,31], Liu et al [32] and Sun et al [33] conducted the axial compression test research of circular FRP-steel composite-confined concrete on the change in FRP thickness, FRP type and steel tube diameter-thickness ratio. Wei et al [15] designed different FRP layers, FRP types and steel spirals spacing to study the axial compressive properties of circular FRP-steel spirals confined concrete.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Cross-Sectional Shape and Corner Radius on the Compressive Behaviour of Concrete Columns Confined by FRP and Stirrups

Wei

Wang

et al. 2022

Polymers

Self Cite

View full text Add to dashboard Cite

Axial compression tests were carried out on 72 FRP (fiber reinforced polymer)–stirrup composite−confined concrete columns. Stirrups ensure the residual bearing capacity and ductility after the FRP fractures. To reduce the effect of stress concentration at the corners of the confined square−section concrete columns and improve the restraint effect, an FRP–stirrup composite−confined concrete structure with rounded corners is proposed. Different corner radii of the stirrup and outer FRP were designed, and the corner radius of the stirrup was adjusted accurately to meet the designed corner radius of the outer FRP. The cross−section of the specimens gradually changed from square to circular as the corner radius increased. The influence of the cross−sectional shape and corner radius on the compressive behaviour of FRP–stirrup composite−confined concrete was analysed. An increase in the corner radius can cause the strain distribution of the FRP to be more uniform and strengthen the restraint effect. The larger the corner radius of the specimen, the better the improvement of mechanical properties. The strength of the circular section specimen was greatly improved. In addition, the test parameters also included the FRP layers, FRP types and stirrup spacing. With the same corner radius, increasing the number of FRP layers or densifying the stirrup spacing effectively improved the mechanical properties of the specimens. Finally, a database of FRP–stirrup composite−confined concrete column test results with different corner radii was established. The general calculation models were proposed, respectively, for the peak points, ultimate points and stress–strain models that are applicable to FRP−, stirrup− and FRP–stirrup−confined concrete columns with different cross−sectional shapes under axial compression.

show abstract

Axial compressive behavior of seawater sea-sand coral aggregate concrete-filled circular FRP-steel composite tube columns

Cited by 48 publications

References 53 publications

Pengaruh Aplikasi Fibre Reinforced Polymer (FRP) terhadap Perkuatan Kolom Concrete Filled Steel Tube (CFT) menggunakan Metode Elemen Hingga

Pengaruh Aplikasi Fibre Reinforced Polymer (FRP) terhadap Perkuatan Kolom Concrete Filled Steel Tube (CFT) menggunakan Metode Elemen Hingga

Experimental and Theoretical Study of Concrete-Filled Steel Tube Columns Strengthened by FRP/Steel Strips Under Axial Compression

Influence of the Cross-Sectional Shape and Corner Radius on the Compressive Behaviour of Concrete Columns Confined by FRP and Stirrups

Contact Info

Product

Resources

About