Finite element analysis on axial compressive behavior of steel-tube confined reinforced concrete column-reinforced concrete beam knee joint stiffened with steel rings

被引：0
|
作者：
Ning C. [1 ,2 ]
Wang F. [2 ,3 ]
Yao R. [3 ]
Lai Z. [3 ]
Li X. [3 ]
机构：
[1] Pan Asia Design Institute Co., Ltd., Kunming University of Technology, Kunming
[2] State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou
[3] Architectural Design and Research Institute, South China University of Technology, Guangzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷 / 04期
关键词：
Axial compressive behavior; Bearing capacity; Circular steel-tube confined reinforced concrete column; FEA; Joint reinforcement; Knee joint;
D O I：
10.14006/j.jzjgxb.2019.04.009
中图分类号：
学科分类号：
摘要：
A new construction method that strengthens circular steel-tube confined reinforced concrete (RC) column-RC beam knee joint with additional steel rings in the joint area is proposed. A total of 152 finite element (FE) models of circular steel-tube confined RC column-RC beam knee joint stiffened with steel rings in the joint area were established using the ABAQUS software to study the axial compressive behavior of the stiffened joints, after the FE method was validated using results from existing studies. The FE results show that the stiffened joint has a better axial compressive behavior than common joints, due to its higher bearing capacity and better ductility, which proves the effectiveness of the new strengthening method. Based on the parameter analysis results, it is concluded that the bearing capacity of the stiffened joint under compressive loads increases with the axial compressive strength of concrete, the volume fraction of steel rings and the ratio of longitudinal reinforcement in the joint area. The shear forces at the beam end also influences the bearing capacity of the stiffened joints, and the ductility decreases with the shear force. Based on the analysis results, a formula for calculating the bearing capacity of the reinforced joints under compression was established. The formula can be used as a good reference for designing circular steel-tube confined RC column-RC beam knee joints. © 2019, Editorial Office of Journal of Building Structures. All right reserved.
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页码：81 / 93
页数：12
相关论文
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