Multi-scale mechanism of steel tube restraint effect on concrete of CFST

被引：4
|
作者：
Lu, Zhengran [1 ,2 ]
Guo, Chao [2 ,4 ]
Chen, Zhihua [3 ]
机构：
[1] China Coal Technol & Engn Grp, Shenyang Res Inst, State Key Lab Coal Mine Safety Technol, Shenyang, Peoples R China
[2] Shenyang Jianzhu Univ, Sch Civil Engn, Shenyang, Peoples R China
[3] Tianjin Univ, Sch Civil Engn, Tianjin, Peoples R China
[4] Shenyang Jianzhu Univ, Sch Civil Engn, Middle Hunnan Rd, Shenyang 110168, Peoples R China
来源：
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES | 2024年 / 31卷 / 14期
关键词：
Concrete-filled steel tubular; multi-scale; interfacial transition zone; finite element method; restraint effect; INTERFACIAL TRANSITION ZONE; FLY-ASH; MESOSCALE; BEHAVIOR; PERFORMANCE; STRENGTH; COLUMNS; DIFFUSIVITY; SIMULATION; MODULUS;
D O I：
10.1080/15376494.2023.2169789
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A multi-scale numerical model was used to study the mechanism of steel tube restraint effect on the concrete of concrete-filled steel tube (CFST) columns under compression. In the developed model, aggregates, mortar, and interfacial transition zones (ITZ) of concrete core were fabricated in meso-scale; however, steel tube was considered to be in macro-scale to investigate the interactions of all phases. Parametric analyses with different diameters and steel ratios were conducted to evaluate multi-scale model. The developed multi-scale numerical simulation could be employed to provide a better understanding on cracking processes of concrete and stress paths of steel tubes in CFST.
引用
收藏
页码：3033 / 3048
页数：16
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