|Table of Contents|

Analysis of axial compression performance of steel reinforced concrete T-shaped column(PDF)

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

Issue:
2023年04期
Page:
60-69
Research Field:
建筑结构
Publishing date:

Info

Title:
Analysis of axial compression performance of steel reinforced concrete T-shaped column
Author(s):
ZHAO Hailong12 XU Ruiwen1
(1.School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, China)
Keywords:
steel concrete T column FE model axial compressive property concrete stress stirrup stress steel ratio
PACS:
TU398
DOI:
10.19815/j.jace.2021.11062
Abstract:
In order to further study the mechanical performance of steel reinforced concrete T-shaped column with steel form of “square steel tube + T-shaped steel” under axial load and provide reference for the nonlinear analysis and seismic performance analysis of the stress process of steel reinforced concrete T-shaped column structure, the axial compression model of ordinary concrete T-shaped column was established by ANSYS finite element software. The rationality of the model was verified by comparing with the existing test results. On this basis, the model of “square steel tube + T-shaped steel” steel reinforced concrete T-shaped column was established, and its axial compression performance was analyzed by finite element method. The influences of the steel form of “square steel tube + T-shaped steel” on the stress of concrete section, reinforcement stress and steel stress were deeply studied, and the influence of the parameter change of steel ratio on the axial compression performance was quantitatively analyzed. The results show that compared with ordinary concrete T-shaped columns, the ultimate bearing capacity of “square steel tube + T-shaped steel” steel reinforced concrete T-shaped columns is significantly improved, but the effect of this steel distribution form on the ultimate bearing capacity of T-shaped columns decreases with the increase of stirrup characteristic value. The addition of steel makes the phenomenon of “stress arch” no longer obvious. The strong constraint area of steel is formed in the stirrup constraint area, which is mainly concentrated in the T-shaped steel web area and square steel tube area, and the stress distribution of concrete section is more balanced. With the increase of steel ratio, the average stress of section of T-shaped concrete column decreases under the same proportional load, the stress of steel is fully exerted, and the bearing capacity is significantly increased.

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Last Update: 2023-07-01