|Table of Contents|

Seismic performance of circular steel tube confined steel reinforced recycled concrete short columns(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年06期
Page:
27-34
Research Field:
建筑结构
Publishing date:

Info

Title:
Seismic performance of circular steel tube confined steel reinforced recycled concrete short columns
Author(s):
LIU Jian1; 2;  PENG Linmiao1;  CHEN Panpan1;  LIU Changjiang1; 2;  REN Da1; 2;  CHEN Yuan1; 2;  XIAO Haipeng1;  ZHAO Yu1;  YANG Qinpeng1
(1. College of Civil Engineering, Guangzhou University, Guangzhou 510006, Guangdong, China; 2. Guangdong Engineering Technology Research Center for Complex Steel Structures, Guangzhou University, Guangzhou 510006, Guangdong, China)
Keywords:
circle steel tube steel reinforced concrete;  recycled concrete column;  diameter-thickness ratio;  recycled coarse aggregate;  replacement rate;  axial compression ratio;  seismic performance
PACS:
TU528
DOI:
10.19815/j.jace.2022.01078
Abstract:
The seismic performance of circular steel tube confined steel reinforced recycled concrete short columns was studied. On the premise of verifying the rationality of the analysis model, the influence of design parameters such as diameter-thickness ratio of circular steel tube, replacement rate of recycled coarse aggregate and axial compression ratio on the mechanical properties of the specimens was considered. The seismic performance indexes such as hysteresis curve, skeleton curve, ductility coefficient, equivalent viscous damping coefficient and the peak bearing capacity of the specimens were obtained and compared with the existing tests. The results show that when the parameters such as the replacement ratio of recycled concrete, axial compression ratio and steel ratio are basically the same, the circular steel tube confined steel recycled concrete short column shows better deformation and energy dissipation capacity than the steel recycled concrete column and the circular steel tube steel recycled concrete column. The replacement rate of recycled coarse aggregate has little effect on the seismic performance index such as hysteresis curve, which can basically meet the seismic requirements of the project and can be widely used in the bearing structure of the project. When the replacement rate and axial compression ratio are the same, with the increase of diameter-thickness ratio, the initial stiffness, peak bearing capacity and energy dissipation capacity of the elastic stage of the specimen gradually decrease, but the ductility will be improved to a certain extent, and the ductility deformation capacity can be increased by 30%-40%. When the replacement rate and the diameter-thickness ratio are the same, with the increase of the axial compression ratio, the peak bearing capacity and energy dissipation capacity of the specimens do not change much, and the ductility is getting worse and worse.

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Last Update: 2023-12-01