Ultimate capacity and bending-torsion correlation of steel tube confined RC columns under combined compression-bending-torsion load

被引：0

作者：

Yu J. ^{[1
,2
]}

Wang Y. ^{[1
,2
]}

Wang W. ^{[3
]}

Zhou X. ^{[1
,2
]}

Luo W. ^{[4
]}

Kong W. ^{[4
]}

机构：

[1] School of Civil Engineering, Chongqing University, Chongqing

[2] Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Ministry of Education, Chongqing

[3] Sichuan Provincial Architectural Design and Research Institute, Chengdu

[4] China Shipbuilding Industry Corporation Offshore Wind Power Co., Ltd, Chongqing

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2020年 / 41卷 / 05期

关键词：

Bending-torsion correlation; Combined compression-bending-torsion load; Steel tube confined RC column; Torsional capacity;

D O I：

10.14006/j.jzjgxb.2019.0380

中图分类号：

学科分类号：

摘要：

Based on tests of four steel tube confined RC columns under combined bending-torsion and compression-bending-torsion loading, the FE software ABAQUS was adopted to establish finite element model and simulate the failure modes and bearing capacity of specimens under combined bending-torsion and compression-bending-torsion loading. Compared with tests results, the accuracy of the finite element models was validated. The influence of steel tube strength, steel tube thickness, section size, concrete strength, the diameter and yield strength of longitudinal bar and stirrup bar, and axial force on capacity under combined load was studied by parametric analysis of finite element model. The results show that the thickness of steel tube, the size of section, the diameter and yield strength of longitudinal bar and the axial fore are the main factors affecting the torsional capacity under combined load. When the axial pressure of the circular steel tube confined RC column reaches 0.3 Nu (Nu is axial bearing capacity)or the axial pressure of the square steel tube confined RC column reaches 0.5Nu, the bearing capacity of the column reaches the peak. Under the influence of different factors, the relationship between bending and torsion of steel tube confined RC column under the same load is basically the same. © 2020, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：96 / 107

页数：11

共 13 条

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