|Table of Contents|

Axial compressive performance of steel reinforced ultra-high performance concrete filled square stainless steel tube(PDF)

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

Issue:
2023年05期
Page:
78-88
Research Field:
建筑结构
Publishing date:

Info

Title:
Axial compressive performance of steel reinforced ultra-high performance concrete filled square stainless steel tube
Author(s):
CHENG Zhan;  LI Junhua;  LIU Zidan;  DU Guofeng
(School of Urban Construction,Yangtze University, Jingzhou 434023, Hubei, China)
Keywords:
square stainless steel tube;  UHPC;  axial compression test;  bearing capacity;  numerical simulation
PACS:
TU398.9
DOI:
10.19815/j.jace.2022.02071
Abstract:
In order to study the axial compressive performance of steel reinforced ultra-high performance concrete filled square stainless steel tube(SR-UHPCFSSST), six members were designed with the parameters of diameter-to-thickness ratio and steel section area, and axial compression test and numerical simulation calculation were performed to obtain the failure form, ultimate bearing capacity and load-displacement curve of members. Using finite element analysis method to expand the parameters, the effects of changes in aspect ratio and concrete strength on the failure process, ultimate bearing capacity and ductility of the members were studied. Based on the test and numerical simulation results, the calculation formula of SR-UHPCFSSST was put forward. The results show that the failure characteristics of all members are similar, and there is local waveform drum in the middle, but there is also drum at the end of the member containing steel bone. Different materials in the members have different effects on the ultimate bearing capacity and ductility. The ultimate bearing capacity increases with the increase of steel section area and concrete strength, and decreases with the increase of diameter-to-thickness ratio and aspect ratio, but the influence of diameter-to-thickness ratio and concrete strength on the ultimate bearing capacity of the members is more obvious. The existence of steel bone significantly improves the ductility of the member, and the ductility of the member also increases with the increase of the steel section area, while the increase of concrete strength will reduce the ductility of the member. The calculation results are in good agreement with the test results.

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Last Update: 2023-09-01