Numerical Investigation of the Composite Action of Axially Compressed Concrete-Filled Circular Aluminum Alloy Tubular Stub Columns

被引：22

作者：

Ding, Faxing ^{[1
,2
]}

Liao, Changbin ^{[1
]}

Wang, En ^{[1
]}

Lyu, Fei ^{[1
]}

Xu, Yunlong ^{[1
]}

Liu, Yicen ^{[1
]}

Feng, Yuan ^{[3
]}

Shang, Zhihai ^{[4
]}

机构：

[1] Cent South Univ, Sch Civil Engn, Changsha 410075, Peoples R China

[2] Engn Technol Res Ctr Prefabricated Construct Ind, Changsha 410075, Peoples R China

[3] China Southwest Architectural Design & Res Inst C, Chicago, IL 60603 USA

[4] MCC Capital Engn & Res Inc Ltd, Beijing 100176, Peoples R China

来源：

MATERIALS | 2021年 / 14卷 / 09期

基金：

中国国家自然科学基金;

关键词：

aluminum alloy; concrete-filled circular aluminum alloy tubular (CFCAT) stub columns; finite element (FE) analysis; ultimate bearing capacity; confinement effect; ANALYTICAL BEHAVIOR; STRENGTH; DESIGN;

D O I：

10.3390/ma14092435

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper studied the composite action of concrete-filled circular aluminum alloy tubular (CFCAT) stub columns under axial compression. A fine-meshed finite three-dimensional (3D) solid element model making use of a tri-axial plastic-damage constitutive model of concrete and elastoplastic constitutive model of aluminum alloy was established. A parametric study utilizing the verified finite element (FE) model was carried out and the analytical results were exploited to investigate the composite actions of concrete-filled circular aluminum alloy tubular stub columns subjected axial compression. Compared with the concrete-filled steel tube (CFCST) stub columns, the aluminum alloy tube exerted a weaker constraint effect on the infilled concrete due to its lower elastic modulus. Based on the FE analytical results and regression method, the composite action model of concrete-filled circular aluminum alloy tubular stub columns was proposed. By generalizing the stress nephogram of the concrete-filled circular aluminum alloy tubular stub column at the limit state, a design formula was proposed to estimate the ultimate bearing capacity the columns using the superposition method. The predicted results of the proposed formula show a good agreement with both the experimental and FE analytical results. The comparison between the proposed formula and current design methods indicates that the proposed formula is more accurate and convenient to use.

引用

页数：18

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