Performance of recycled aggregate concrete-filled steel tubular columns under combined compression and shear load

Yang，Zhi Cheng1; Han，Lin Hai1; Hou，Chao2

2022-02-15

10.1016/j.engstruct.2021.113771

ENGINEERING STRUCTURES   影响因子和分区

0141-0296

1873-7323

This paper presents the behavior of recycled aggregate concrete-filled steel tubular columns under combined compression and shear load. A total of 30 recycled aggregate concrete-filled steel tubular specimens were tested, with their failure modes and shear capacities investigated. The main parameters considered include the cross-section type, the axial load ratio, the shear span-to-depth ratio, the steel ratio and the replacement rate of recycled coarse aggregates. A finite element analysis model is established, which is verified and then used to conduct analysis on the shear performance in terms of the failure modes, the full-range load-deflection relations, the stress distributions and the load transfer mechanism. The results show that both the axial load ratio and the shear span-to-depth ratio have influence on the failure modes. A strut-tie mechanism model is proposed to reveal these influences. Four failure modes are identified, while recycled aggregate concrete-filled steel tubular columns tend to fail in a shear manner with a smaller shear span-to-depth ratio and a higher axial load level. Finally, an existing simplified model is assessed to predict the shear capacity of recycled aggregate concrete-filled steel tubular columns under combined compression and shear load.

Combined compression and shear load Concrete-filled steel tube (CFST) Design method Failure mode Recycled aggregate concrete (RAC)

SCI ; EI

英语

其他

National Natural Science Foundation of China (NSFC)[51678341,51838008]

Engineering

Engineering, Civil

WOS:000772608600004

ELSEVIER SCI LTD

20215211400666

Axial loads ; Concrete aggregates ; Failure modes ; Recycling

Structural Design:408 ; Structural Members and Shapes:408.2 ; Concrete:412 ; Industrial Wastes:452.3 ; Steel:545.3

ENGINEERING

2-s2.0-85121814813

Scopus

1.Department of Civil Engineering,Tsinghua University,Beijing,100084,China
2.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Yang，Zhi Cheng,Han，Lin Hai,Hou，Chao. Performance of recycled aggregate concrete-filled steel tubular columns under combined compression and shear load[J]. ENGINEERING STRUCTURES,2022,253.

Yang，Zhi Cheng,Han，Lin Hai,&Hou，Chao.(2022).Performance of recycled aggregate concrete-filled steel tubular columns under combined compression and shear load.ENGINEERING STRUCTURES,253.

Yang，Zhi Cheng,et al."Performance of recycled aggregate concrete-filled steel tubular columns under combined compression and shear load".ENGINEERING STRUCTURES 253(2022).