|Table of Contents|

Analysis on axial compressive mechanical behavior of circular concrete-filled steel tube stub column under alternation of freeze-thaw cycle and acid rain corrosion(PDF)

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

Issue:
2023年02期
Page:
40-49
Research Field:
建筑结构
Publishing date:

Info

Title:
Analysis on axial compressive mechanical behavior of circular concrete-filled steel tube stub column under alternation of freeze-thaw cycle and acid rain corrosion
Author(s):
LYU Xuetao1; 2;  ZHANG Liqiang3;  ZHANG Tong2;  ZHANG Yuzhuo4;  WANG Jinli2
(1. School of Transportation, Civil Engineering & Architecture, Foshan University, Foshan 528000, Guangdong, China; 2.School of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China; 3.Gansu Diantong Power Engineering Design Consulting Co., Ltd, Lanzhou 730030, Gansu, China; 4.School of Management, Shenyang Jianzhu University, Shenyang 110168, Liaoning, China)
Keywords:
freeze-thaw cycle;  acid rain corrosion;  circular concrete-filled steel tube stub column;  finite element analysis
PACS:
TU973.2
DOI:
10.19815/j.jace.2021.10043
Abstract:
Based on the methods of material strength reduction and steel tube thickness reduction, the axial compressive mechanical behavior of circular concrete-filled steel tube(CFST)stub columns under the alternation of freeze-thaw cycle and acid rain corrosion were studied by finite element method. Based on the reasonable finite element analysis model, the failure mode, axial load-displacement relationship and the interaction between the steel tube and concrete of circular CFST stub columns under the alternation of freeze-thaw cycle and acid rain corrosion were analyzed. The effects of steel ratio, section size, yield strength of steel tube, axial compressive strength of concrete and alternating time of freeze-thaw cycle and acid rain on the axial compressive ultimate bearing capacity were studied. The results show that the finite element simulation results are in good agreement with the experimental results, which verifies the validity of the model. The failure mode of axially loaded circular CFST stub column under the alternating action of freeze-thaw cycle and acid rain corrosion is similar to that of ordinary specimen. The variation trends of the axial load-displacement curves are consistent, and all specimens are plastic failure. With the increase of alternating time of freeze-thaw cycle and acid rain corrosion, the material properties deteriorate seriously and the restraint effect of steel tube on core concrete weakens, which causes the ultimate bearing capacity of specimen decreases significantly.

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Last Update: 2023-03-20