Nonlinear analysis of square steel-reinforced concrete-filled steel tubular short columns considering local buckling

被引：21

作者：

Ahmed, Mizan ^{[1
]}

Shahin, Ramy I. ^{[2
]}

Yehia, Saad A. ^{[2
]}

Emara, Mohamed ^{[3
,4
]}

Patel, Vipulkumar Ishvarbhai ^{[5
]}

Liang, Qing Quan ^{[6
,7
]}

机构：

[1] Curtin Univ, Ctr Infrastruct Monitoring & Protect, Sch Civil & Mech Engn, Bentley, WA, Australia

[2] Higher Inst Engn & Technol, Dept Civil Engn, Kafrelsheikh, Egypt

[3] Zagazig Univ, Fac Engn, Struct Engn Dept, Zagazig, Egypt

[4] Delta Higher Inst Engn & Technol, Dept Civil Engn, Talkha, Egypt

[5] La Trobe Univ, Sch Comp Engn & Math Sci, Bendigo, Vic, Australia

[6] Victoria Univ, Coll Sport Hlth & Engn, Melbourne, Vic, Australia

[7] Victoria Univ, Coll Sport Hlth & Engn, POB 14428, Melbourne, Vic 8001, Australia

来源：

STRUCTURAL CONCRETE | 2024年 / 25卷 / 01期

关键词：

concrete confinement; fiber element modeling; local buckling. Nonlinear analysis; steel-reinforced concrete-filled steel tubes; STRESS-STRAIN MODEL; STUB COLUMNS; STRENGTH; BEHAVIOR; PERFORMANCE;

D O I：

10.1002/suco.202300402

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents a fiber element analysis model that simulates the structural responses of square steel-reinforced concrete-filled steel tubular (SRCFST) short columns under concentric compression including local buckling effects. The method of effective widths is utilized to model the gradual postlocal buckling of the steel tube walls of a SRCFST column loaded axially to failure. A new confinement model is developed for the concrete based on test results, considering the confinement induced by the embedded steel section. This confinement model is incorporated into the fiber model, and its accuracy is verified by experimental results. The accuracy of various confinement models proposed for concrete-filled steel tubular (CFST) square columns in predicting the performance of SRCFST columns is evaluated. A parametric study is performed to investigate the performance of SRCFST columns with various parameters. The applicability of the design formulas specified in current standards for CFST columns to the design of SRCFST columns is examined. A formula is proposed to predict the strength of SRCFST short columns. The developed inelastic simulation model, confinement model, and design formula are found to yield performance predictions of SRCFST columns with good accuracy.

引用

页码：69 / 84

页数：16

共 30 条

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