Study on Mechanical Behavior of Integrated Multi-cell Concrete-filled Steel Tubular Stub Columns Under Concentric Compression

Hua Song, Jiepeng Liu, Yuanlong Yang, Y. Frank Chen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

11 integrated multi-cell concrete-filled steel tubular (CFST) stub columns were tested under concentric compression. The key factors of width-to-thickness ratio (D/t) of steel plates in column limb and prism compressive strength of concrete (f ck ) were considered and their influence on failure mode, bearing capacity, and ductility of the columns were investigated. The experimental results show that: (1) the constraint effect for concrete provided by the multi-cell steel tube cannot be overlooked; (2) the ductility decreases with the increasing ratio D/t of the connecting steel plates for the multi columns; and (3) the bearing capacity increases, while the ductility decreases, with the increasing f ck . The finite element (FE) method was used to simulate the integrated multi-cell CFST stub columns and to verify the test results. A parametric analysis using the FE method was carried out to study the effects of the steel ratio α, steel yield strength f y , concrete strength f ck , and D/t on the stiffness, bearing capacity, and ductility of the columns. Furthermore, the measured bearing capacity values were compared to those estimated by the Chinese, European, and American design codes. This study shows that the bearing capacity of integrated multi-cell CFST stub column can be reasonably predicted by the design method specified in GB 50936-2014 or EC4-2004 code.

Original languageEnglish (US)
Pages (from-to)361-376
Number of pages16
JournalInternational Journal of Civil Engineering
Volume17
Issue number3
DOIs
StatePublished - Mar 4 2019

Fingerprint

Compaction
Concretes
Bearing capacity
Steel
Ductility
Finite element method
Prisms
Failure modes
Compressive strength
Yield stress
Stiffness

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cite this

@article{08764b158fe548ed89176d7640526f7f,
title = "Study on Mechanical Behavior of Integrated Multi-cell Concrete-filled Steel Tubular Stub Columns Under Concentric Compression",
abstract = "11 integrated multi-cell concrete-filled steel tubular (CFST) stub columns were tested under concentric compression. The key factors of width-to-thickness ratio (D/t) of steel plates in column limb and prism compressive strength of concrete (f ck ) were considered and their influence on failure mode, bearing capacity, and ductility of the columns were investigated. The experimental results show that: (1) the constraint effect for concrete provided by the multi-cell steel tube cannot be overlooked; (2) the ductility decreases with the increasing ratio D/t of the connecting steel plates for the multi columns; and (3) the bearing capacity increases, while the ductility decreases, with the increasing f ck . The finite element (FE) method was used to simulate the integrated multi-cell CFST stub columns and to verify the test results. A parametric analysis using the FE method was carried out to study the effects of the steel ratio α, steel yield strength f y , concrete strength f ck , and D/t on the stiffness, bearing capacity, and ductility of the columns. Furthermore, the measured bearing capacity values were compared to those estimated by the Chinese, European, and American design codes. This study shows that the bearing capacity of integrated multi-cell CFST stub column can be reasonably predicted by the design method specified in GB 50936-2014 or EC4-2004 code.",
author = "Hua Song and Jiepeng Liu and Yuanlong Yang and Chen, {Y. Frank}",
year = "2019",
month = "3",
day = "4",
doi = "10.1007/s40999-018-0367-z",
language = "English (US)",
volume = "17",
pages = "361--376",
journal = "International Journal of Civil Engineering",
issn = "1735-0522",
publisher = "Iran University of Science and Technology",
number = "3",

}

Study on Mechanical Behavior of Integrated Multi-cell Concrete-filled Steel Tubular Stub Columns Under Concentric Compression. / Song, Hua; Liu, Jiepeng; Yang, Yuanlong; Chen, Y. Frank.

In: International Journal of Civil Engineering, Vol. 17, No. 3, 04.03.2019, p. 361-376.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Study on Mechanical Behavior of Integrated Multi-cell Concrete-filled Steel Tubular Stub Columns Under Concentric Compression

AU - Song, Hua

AU - Liu, Jiepeng

AU - Yang, Yuanlong

AU - Chen, Y. Frank

PY - 2019/3/4

Y1 - 2019/3/4

N2 - 11 integrated multi-cell concrete-filled steel tubular (CFST) stub columns were tested under concentric compression. The key factors of width-to-thickness ratio (D/t) of steel plates in column limb and prism compressive strength of concrete (f ck ) were considered and their influence on failure mode, bearing capacity, and ductility of the columns were investigated. The experimental results show that: (1) the constraint effect for concrete provided by the multi-cell steel tube cannot be overlooked; (2) the ductility decreases with the increasing ratio D/t of the connecting steel plates for the multi columns; and (3) the bearing capacity increases, while the ductility decreases, with the increasing f ck . The finite element (FE) method was used to simulate the integrated multi-cell CFST stub columns and to verify the test results. A parametric analysis using the FE method was carried out to study the effects of the steel ratio α, steel yield strength f y , concrete strength f ck , and D/t on the stiffness, bearing capacity, and ductility of the columns. Furthermore, the measured bearing capacity values were compared to those estimated by the Chinese, European, and American design codes. This study shows that the bearing capacity of integrated multi-cell CFST stub column can be reasonably predicted by the design method specified in GB 50936-2014 or EC4-2004 code.

AB - 11 integrated multi-cell concrete-filled steel tubular (CFST) stub columns were tested under concentric compression. The key factors of width-to-thickness ratio (D/t) of steel plates in column limb and prism compressive strength of concrete (f ck ) were considered and their influence on failure mode, bearing capacity, and ductility of the columns were investigated. The experimental results show that: (1) the constraint effect for concrete provided by the multi-cell steel tube cannot be overlooked; (2) the ductility decreases with the increasing ratio D/t of the connecting steel plates for the multi columns; and (3) the bearing capacity increases, while the ductility decreases, with the increasing f ck . The finite element (FE) method was used to simulate the integrated multi-cell CFST stub columns and to verify the test results. A parametric analysis using the FE method was carried out to study the effects of the steel ratio α, steel yield strength f y , concrete strength f ck , and D/t on the stiffness, bearing capacity, and ductility of the columns. Furthermore, the measured bearing capacity values were compared to those estimated by the Chinese, European, and American design codes. This study shows that the bearing capacity of integrated multi-cell CFST stub column can be reasonably predicted by the design method specified in GB 50936-2014 or EC4-2004 code.

UR - http://www.scopus.com/inward/record.url?scp=85061441324&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85061441324&partnerID=8YFLogxK

U2 - 10.1007/s40999-018-0367-z

DO - 10.1007/s40999-018-0367-z

M3 - Article

AN - SCOPUS:85061441324

VL - 17

SP - 361

EP - 376

JO - International Journal of Civil Engineering

JF - International Journal of Civil Engineering

SN - 1735-0522

IS - 3

ER -