Eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections

Concrete-encased concrete-filled steel tube (CECFST) columns have recently been regarded as the optimum option for high-rise or heavy-loaded buildings due to superior structural resistance over traditional concrete-filled steel tube (CFST) and reinforced concrete (RC). Thus, in developed countries w...

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Main Authors: Zhu, Gaoming, Tan, Kang Hai
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/180642
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1806422024-10-16T00:01:47Z Eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections Zhu, Gaoming Tan, Kang Hai School of Civil and Environmental Engineering Engineering Precast connections Jointed columns Concrete-encased concrete-filled steel tube (CECFST) columns have recently been regarded as the optimum option for high-rise or heavy-loaded buildings due to superior structural resistance over traditional concrete-filled steel tube (CFST) and reinforced concrete (RC). Thus, in developed countries with severe manpower shortages such as Singapore, advanced precast dry connections were proposed for the CECFST columns to facilitate construction and tackle manpower crunch. Moreover, current research shows that the proposed connection has comparable structural resistance with conventional cast-in-place (CIP) connections, demonstrating huge application potential. However, the existing research is only limited to the performance of precast connections without any experimental studies on jointed columns, which hinders the implementation of the precast connections in engineering of practices. In this paper, to address this research gap, a comprehensive experimental programme was initiated, followed by extensive numerical studies. A total of six intermediate and slender jointed precast columns were tested to investigate the effect of precast connections on load-carrying behaviour of the jointed CECFST columns by considering column slenderness, connection detailing, connection position and load eccentricity. Besides experimental studies, extensive 3D finite element (FE) simulations were performed to investigate the relationship between connection integrity, constructability, and load-carrying performance of the jointed CECFST columns. The numerical studies showed that implementing the conventional “Equivalent to CIP” concept into the design of jointed precast CECFST columns would significantly compromise the constructability of such columns. To address this concern, a performance-based design method was proposed for jointed CECFST columns. Parametric studies showed that adopting the performance-based design method could not only improve constructability but also achieve sufficient column resistance. Jurong Town Corporation (JTC) in Singapore is gratefully acknowledged for providing the funding entitled “The behaviour and design of innovative composite concrete-steel structural system” (RCA17/114). 2024-10-16T00:01:47Z 2024-10-16T00:01:47Z 2024 Journal Article Zhu, G. & Tan, K. H. (2024). Eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections. Engineering Structures, 321, 118923-. https://dx.doi.org/10.1016/j.engstruct.2024.118923 0141-0296 https://hdl.handle.net/10356/180642 10.1016/j.engstruct.2024.118923 2-s2.0-85203634801 321 118923 en RCA17/114 Engineering Structures © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Precast connections
Jointed columns
spellingShingle Engineering
Precast connections
Jointed columns
Zhu, Gaoming
Tan, Kang Hai
Eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections
description Concrete-encased concrete-filled steel tube (CECFST) columns have recently been regarded as the optimum option for high-rise or heavy-loaded buildings due to superior structural resistance over traditional concrete-filled steel tube (CFST) and reinforced concrete (RC). Thus, in developed countries with severe manpower shortages such as Singapore, advanced precast dry connections were proposed for the CECFST columns to facilitate construction and tackle manpower crunch. Moreover, current research shows that the proposed connection has comparable structural resistance with conventional cast-in-place (CIP) connections, demonstrating huge application potential. However, the existing research is only limited to the performance of precast connections without any experimental studies on jointed columns, which hinders the implementation of the precast connections in engineering of practices. In this paper, to address this research gap, a comprehensive experimental programme was initiated, followed by extensive numerical studies. A total of six intermediate and slender jointed precast columns were tested to investigate the effect of precast connections on load-carrying behaviour of the jointed CECFST columns by considering column slenderness, connection detailing, connection position and load eccentricity. Besides experimental studies, extensive 3D finite element (FE) simulations were performed to investigate the relationship between connection integrity, constructability, and load-carrying performance of the jointed CECFST columns. The numerical studies showed that implementing the conventional “Equivalent to CIP” concept into the design of jointed precast CECFST columns would significantly compromise the constructability of such columns. To address this concern, a performance-based design method was proposed for jointed CECFST columns. Parametric studies showed that adopting the performance-based design method could not only improve constructability but also achieve sufficient column resistance.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Zhu, Gaoming
Tan, Kang Hai
format Article
author Zhu, Gaoming
Tan, Kang Hai
author_sort Zhu, Gaoming
title Eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections
title_short Eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections
title_full Eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections
title_fullStr Eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections
title_full_unstemmed Eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections
title_sort eccentric compression performance of jointed precast concrete-encased concrete-filled steel tube columns with dry connections
publishDate 2024
url https://hdl.handle.net/10356/180642
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