Flexural performance of cast-in-place concrete-filled steel tube piles under varying axial load

Subedi, Naresh; Thusoo, Shreya; Obara, Taku; Kôno, Susumu; Kaneko, Osamu; Hayakawa, Tetsuo; Watanabe, Hidekazu; Mukai, Tomohisa

doi:10.1016/j.tws.2022.109130

Cited by 9 publications

(3 citation statements)

References 17 publications

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“…None of the articles existed. Nevertheless, some relevant studies were found in the literature [76] - [78]. This may be an interesting research topic for CFT.…”

Section: Figure 3 Type Of Bucklingmentioning

confidence: 99%

Learning About Concrete-Filled Tube Using Chatgpt

Ling¹,

Lim²,

Leong³

et al. 2023

Journal of Civil Engineering

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ChatGPT is an artificial intelligence that can understand context and respond appropriately. It could be used for research on a topic. However, ChatGPT does not always provide accurate information. Its performance has not been tested in engineering fields. In this study, ChatGPT was consulted about concrete-filled tubes (CFT), which is a structural element primarily subjected to axial load. Fifty-eight questions were posted to ChatGPT. ChatGPT's responses (370 sentences) were evaluated. ChatGPT generated plagiarism-free statements, with only a 12% Turnitin similarity index. 78.6% of ChatGPT's sentences were long and complex. Thus, Hemingway Editor gave them a Grade 14 for poor readability. The information given by ChatGPT can be classified as correct, erroneous, contradictory, and unverified. ChatGPT could be used as a research tool, but with limitations. It can explain the basic concepts of CFT but also provide inaccurate and contradictory information. A researcher needs to be cautious while using ChatGPT in research. ChatGPT could be used to test some hypotheses or theories. However, the quality of the output is dependent on the user's critical inputs and an in-depth conversation with ChatGPT.

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“…None of the articles existed. Nevertheless, some relevant studies were found in the literature [76] - [78]. This may be an interesting research topic for CFT.…”

Section: Figure 3 Type Of Bucklingmentioning

confidence: 99%

Learning About Concrete-Filled Tube Using Chatgpt

Ling¹,

Lim²,

Leong³

et al. 2023

Journal of Civil Engineering

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“…Concrete-filled steel tubes (CFSTs) are structurally robust members [1,2]. CFSTs are strong in combined axial load and bending, so CFST components are commonly used for deep piles and drilled shaft foundations [3,4]. The efficiency and strength of circular CFST are a result of the optimum placement of the steel tube to resist bending and the use of the infill concrete to resist high-compression loads.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental studies on circular CFSTs subjected to shear loading have been conducted in China (e.g., [68]), Japan (e.g., [9]) and the US (e.g., [10,11]). These investigations cover important design parameters including (1) the compressive concrete strength, (2) the yield strength of steel (𝐹 𝑦 ), (3) the shear span-todiameter ratio (𝑎/𝐷), (4) the diameter of the CFST (𝐷), (5) the axial load ratio (𝑃/𝑃 0 ), (6) the internal reinforcement ratio (𝜌 𝑖𝑛𝑡 ), and (7) the bond condition between steel tube and concrete. The collective findings from these investigations are: (1) shear failure does not occur for 𝑎/𝐷 greater than 0.5 [6,8], (2) the shear strength increased with an increase in the 𝑃/𝑃 0 ratio [8,10], (3) composite action between the steel tube and infill concrete is needed to develop the full shear resistance [10], and (4) internal reinforcement has a much smaller contribution to the total shear capacity and in many cases can be neglected [10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation and improvement of shear-strength expressions for circular concrete-filled steel tubes

Zhao¹,

Lehman²,

Zhang³

et al. 2023

JSEAM

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The accuracy of the shear resistance design equation for concrete-filled steel tubes (CFSTs) is crucial to ensure the safety of CFST structures. However, the current design equations underestimate the test data, and cannot accurately predict the relative shear resistance of the steel and concrete fill. To solve this problem, this paper developed an advanced finite element model in the LS-Dyna program, which was validated using experimental results of CFST members failing in shear. A systematic parametric study was then conducted. The result showed that the contribution of the steel increased significantly with the strain-hardening ratio (F_u/F_y) while the contribution of concrete fill was greatly influenced by the internally reinforced ratio (ρ_int) and axial load level (P/P_0). These predictions were combined with the experimental results to develop a more accurate and reliable design expression for the shear strength of circular CFSTs.

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Behavior of laterally loaded cast-in-place (CIP) piles with double steel casings embedded in bare hard rock in deep water areas

Chang

Wang

et al. 2023

Computers and Geotechnics

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Flexural performance of cast-in-place concrete-filled steel tube piles under varying axial load

Cited by 9 publications

References 17 publications

Learning About Concrete-Filled Tube Using Chatgpt

Learning About Concrete-Filled Tube Using Chatgpt

Evaluation and improvement of shear-strength expressions for circular concrete-filled steel tubes

Behavior of laterally loaded cast-in-place (CIP) piles with double steel casings embedded in bare hard rock in deep water areas

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