Strength, stiffness and ductility of concrete-filled steel columns under axial compression

被引:257
作者
Wang, Zhi-Bin [1 ,2 ]
Tao, Zhong [2 ]
Han, Lin-Hai [3 ]
Uy, Brian [4 ]
Lam, Dennis [5 ]
Kang, Won-Hee [2 ]
机构
[1] Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Fujian Province, Peoples R China
[2] Univ Western Sydney, Ctr Infrastructure Engn, Penrith, NSW 2751, Australia
[3] Tsinghua Univ, Dept Civil Engn, Beijing 100084, Peoples R China
[4] Univ Sydney, Sch Civil Engn, Sydney, NSW 2006, Australia
[5] Univ Bradford, Sch Engn, Richmond Rd, Bradford BD7 1DP, W Yorkshire, England
基金
澳大利亚研究理事会;
关键词
Concrete-filled steel tubes; Axial compression; Finite element analysis; Compressive strength; Compressive stiffness; Ductility; STUB COLUMNS; CAPACITY; BEHAVIOR; TESTS;
D O I
10.1016/j.engstruct.2016.12.049
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Extensive experimental and theoretical studies have been conducted on the compressive strength of concrete-filled steel tubular (CFST) columns, but little attention has been paid to their compressive stiffness and deformation capacity. Despite this, strength prediction approaches in existing design codes still have various limitations. A finite element model, which was previously proposed by the authors and verified using a large amount of experimental data, is used in this paper to generate simulation data covering a wide range of parameters for circular and rectangular CFST stub columns under axial Compression. Regression analysis is conducted to propose simplified models to predict the compressive strength, the compressive stiffness, and the compressive strain corresponding to the compressive strength (ductility) for the composite columns. Based on the new strength prediction model, the capacity reduction factors for the steel and concrete materials are recalibrated to achieve a target reliability index of 3.04 when considering resistance effect only. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:209 / 221
页数:13
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