Axial Compressive Behavior of Ultra-high-Strength Steel Fiber-Reinforced Concrete-Filled Square Steel Columns

被引：0

作者：

Zhang B. ^{[1
]}

Hu H. ^{[2
,3
]}

Yang Z. ^{[2
]}

机构：

[1] CCCC Construction Group Co.，Ltd., Beijing

[2] College of Civil Engineering, Huaqiao University, Xiamen

[3] Key Laboratory for Structural Engineering and Disaster Prevention of Fujian Province, Huaqiao University, Xiamen

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2023年 / 26卷 / 05期

关键词：

axial compressive behavior; concrete‑filled steel column; ductility; steel fiber‑reinforced concrete; ultra‑high‑strength concrete;

D O I：

10.3969/j.issn.1007-9629.2023.05.013

中图分类号：

学科分类号：

摘要：

To study the compressive behavior of ultra‑high‑strength concrete‑filled square steel columns，12 square steel columns filled with ultra‑high‑strength steel fiber‑reinforced concrete were tested under axial compression. The test variables included the yield strength and thickness of the steel column，the strength of the matrix concrete and the content of steel fiber. The results indicate that the addition of steel fiber doesn't change the failure modes of the specimens. For the columns with the concrete compressive strength between 80 MPa and 150 MPa and the confinement index between 0.33 and 1.43，the compressive strength of the concrete in the steel square is close to that of the corresponding unconfined concrete. The effect of the steel fiber on improving the ductility of square concrete‑filled steel columns decreases as the concrete strength and confinement index increases. When the concrete compressive strength is 130 MPa and the confinement index is 0.90，the addition of steel fiber with 1.5% volume content ratio has no effect on improving the ductility of square concrete‑filled steel columns. © 2023 Tongji University. All rights reserved.

引用

页码：547 / 554

页数：7

共 16 条

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