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Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns
In order to investigate the bond behavior of preplaced aggregate concrete-filled steel tube (CFT-PAC) columns and the difference of bond behavior between CFT-PAC columns and normal concrete-filled steel tube (CFT-NC) columns, a total of 11 columns were prepared and the push-out tests were conducted....
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013690/ https://www.ncbi.nlm.nih.gov/pubmed/31936537 http://dx.doi.org/10.3390/ma13020300 |
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author | Lv, Jing Zhou, Tianhua Du, Qiang Li, Kunlun Jin, Liangwei |
author_facet | Lv, Jing Zhou, Tianhua Du, Qiang Li, Kunlun Jin, Liangwei |
author_sort | Lv, Jing |
collection | PubMed |
description | In order to investigate the bond behavior of preplaced aggregate concrete-filled steel tube (CFT-PAC) columns and the difference of bond behavior between CFT-PAC columns and normal concrete-filled steel tube (CFT-NC) columns, a total of 11 columns were prepared and the push-out tests were conducted. The experimental parameters included the type of concrete (preplaced aggregate concrete and normal concrete), concrete strength (C40, C50 and C60), cross-section dimension (D = 219 mm, 299 mm and 351 mm) and the thickness of steel tube (t = 6 mm and 8 mm). The results indicated that the CTF-PAC columns had a similar load-slip curves with CFT-NC columns. The bond stresses of the CFT-PAC columns were higher than that of the PAC-NC columns at the same concrete strength. Increasing compressive strength of PAC increased the critical bond strength and bond strength of CFT-PAC columns. With an increase of the L/D ratio, both of the slip corresponding to peak load and bond strength of CFT-PAC columns exhibited an increasing trend. A rise in the D/t ratio led to a decrease in the bond stress of CFT-PAC columns and an increase in slip corresponding to the peak load of CFT-PAC columns. The proposed bond stress–slip relationship model considerably matched the bond stress–slip relationship of CFT-PAC columns. |
format | Online Article Text |
id | pubmed-7013690 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70136902020-03-09 Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns Lv, Jing Zhou, Tianhua Du, Qiang Li, Kunlun Jin, Liangwei Materials (Basel) Article In order to investigate the bond behavior of preplaced aggregate concrete-filled steel tube (CFT-PAC) columns and the difference of bond behavior between CFT-PAC columns and normal concrete-filled steel tube (CFT-NC) columns, a total of 11 columns were prepared and the push-out tests were conducted. The experimental parameters included the type of concrete (preplaced aggregate concrete and normal concrete), concrete strength (C40, C50 and C60), cross-section dimension (D = 219 mm, 299 mm and 351 mm) and the thickness of steel tube (t = 6 mm and 8 mm). The results indicated that the CTF-PAC columns had a similar load-slip curves with CFT-NC columns. The bond stresses of the CFT-PAC columns were higher than that of the PAC-NC columns at the same concrete strength. Increasing compressive strength of PAC increased the critical bond strength and bond strength of CFT-PAC columns. With an increase of the L/D ratio, both of the slip corresponding to peak load and bond strength of CFT-PAC columns exhibited an increasing trend. A rise in the D/t ratio led to a decrease in the bond stress of CFT-PAC columns and an increase in slip corresponding to the peak load of CFT-PAC columns. The proposed bond stress–slip relationship model considerably matched the bond stress–slip relationship of CFT-PAC columns. MDPI 2020-01-09 /pmc/articles/PMC7013690/ /pubmed/31936537 http://dx.doi.org/10.3390/ma13020300 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lv, Jing Zhou, Tianhua Du, Qiang Li, Kunlun Jin, Liangwei Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns |
title | Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns |
title_full | Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns |
title_fullStr | Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns |
title_full_unstemmed | Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns |
title_short | Research on the Bond Behavior of Preplaced Aggregate Concrete-Filled Steel Tube Columns |
title_sort | research on the bond behavior of preplaced aggregate concrete-filled steel tube columns |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013690/ https://www.ncbi.nlm.nih.gov/pubmed/31936537 http://dx.doi.org/10.3390/ma13020300 |
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