Investigation on axial compressive behavior of pentagonal section steel-reinforced concrete columns

Hao, Dong; Qin, Jia; Cao, Wanlin; Wang, Hao

doi:10.1016/j.jobe.2023.105954

Cited by 2 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, a notable drawback of such thin-walled metal tubes is their poor long-term durability, susceptibility to corrosion, and signi cantly higher maintenance costs compared to construction costs. To address the durability issue associated with long-term use, ber-reinforced polymer (FRP) materials, such as glass berreinforced polymer (GFRP) materials, have found applications as alternatives to thin-walled metal tubes [4,5]. Nevertheless, the production costs of FRP tubes are high, and using pure thinner-walled FRP tubes as support poles for guardrails results in insu cient lateral stiffness and load-bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties of GFRP-Confined Bamboo-Reinforced Fine Aggregate Concrete Composite Rod

Bu,

Qi,

Wang

et al. 2024

Preprint

View full text Add to dashboard Cite

A Glass Fiber Reinforced Polymer (GFRP)-confined Bamboo-reinforced fine aggregate Concrete composite Rod (GBCR) is proposed, as an alternative for the thin-walled steel tubes in compressive and bending load-bearing components. To investigate the mechanical properties of GBCR and the synergistic interaction among different materials, a comprehensive experimental study was conducted. The influence factors on the mechanical behaviour of GBCR are investigated by conducting axial compression tests of twelve short GBCR compressing-resistant (SGC) specimens and seven long ones (LGC specimens), and bending tests of ten long GBCR bending-resistant (LGB) specimens. The SGC specimens fail in an axial compression mode characterized by GFRP tube expansion cracking and concrete crushing. The LGC specimens experience instability under axial compression, and brittle fracture is observed in the LGB specimens. The mechanical behaviour of GBCR is influenced by the material composition, bamboo content, concrete compactness, bamboo arrangement direction, and bamboo-reinforcement defects. GBCR specimens with a bamboo content of approximately 20% exhibit a good load-carrying capacity that matches or even exceeds that of the thin-walled hollow steel tube specimens. Furthermore, the LGC specimens show excellent elastic recovery capabilities. Based on the experimental results, a formula for estimating the ultimate axial compressive bearing capacity of GBCR is established.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties of GFRP-Confined Bamboo-Reinforced Fine Aggregate Concrete Composite Rod

Bu,

Qi,

Wang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…To address the aforementioned issues, special-shaped PEC columns have been proposed, as shown in Figure 1, including T-shaped PEC columns, L-shaped PEC columns and cross-shaped PEC (CPEC) columns. Due to the flexible cross-section, the special-shaped PEC columns can be embedded into the walls, avoiding the occurrence of protruding columns and thereby improving the aesthetic effect and room space use efficiency of the building [6]. Furthermore, the exposed steel flanges in two directions make it easier to connect with steel beams, reducing the construction difficulties and improving the construction efficiency [7].…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Cross-Shaped Partially Encased Steel–Concrete Composite Columns: Experimental and Numerical Investigations

Xu,

Liu,

Wang

2024

Buildings

View full text Add to dashboard Cite

Special-shaped partially encased steel–concrete composite (PEC) columns could not only improve the aesthetic effect and room space use efficiency, but also exhibit good mechanical performance under static load when used in multi-story residential and office buildings. However, research on the seismic performance of special-shaped PEC columns is insufficient and urgently needed. To investigate the seismic performance of cross-shaped partially encased steel–concrete composite (CPEC) columns, three CPEC columns were designed and tested under combined constant axial load and lateral cyclic load. The test results show that the CPEC columns had good load capacity and ductility, and that the columns failed because of concrete crushing and steel flange buckling after the yielding of the steel flange. The plump hysteresis loops indicated that the CPEC column also had good energy dissipation capacity. Due to the constraint of hydraulic jacks, increasing the load ratio would decrease the effective length, thereby increasing the load capacity of the CPEC column and decreasing the ductility. A finite element model was also established to simulate the response of the CPEC columns, and the simulated results agree well with the experimental results. Thereafter, an extensive parametric analysis was performed to study the influences of different parameters on the seismic performance of CPEC columns. For the CPEC column with an ideal hinged boundary condition at the top, its lateral load capacity gradually decreases with the growth of the load ratio and link spacing and increases with the rise of the steel yield strength, concrete compressive strength, flange and web thickness, and sectional aspect ratio. This research could provide a basis for future theoretical analyses and engineering application.

show abstract

Investigation on axial compressive behavior of pentagonal section steel-reinforced concrete columns

Cited by 2 publications

References 15 publications

Experimental Study on Mechanical Properties of GFRP-Confined Bamboo-Reinforced Fine Aggregate Concrete Composite Rod

Experimental Study on Mechanical Properties of GFRP-Confined Bamboo-Reinforced Fine Aggregate Concrete Composite Rod

Seismic Performance of Cross-Shaped Partially Encased Steel–Concrete Composite Columns: Experimental and Numerical Investigations

Contact Info

Product

Resources

About