Seismic Performance of Steel Tube‑reinforced Concrete Column Joints Embedded with Built‑in Section Steel

WANG Qiuwei; JING Xuanguang; JING Ruiying

doi:10.13409/j.cnki.jdpme.20230228001

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Seismic Performance of Steel Tube‑reinforced Concrete Column Joints Embedded with Built‑in Section Steel

更新时间：2024-09-07

- Seismic Performance of Steel Tube‑reinforced Concrete Column Joints Embedded with Built‑in Section Steel
- Journal of Disaster Prevention and Mitigation Engineering Vol. 44, Issue 4, Pages: 849-858(2024)
- 作者机构：
  
  1.西安建筑科技大学土木工程学院,陕西西安 710055
  2.西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安 710055
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.20230228001
  CLC： TU398
- Received：28 February 2023，
  
  Revised：2023-08-23，
  
  Published：30 August 2024
- 稿件说明：
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王秋维,景烜光,景瑞颖.内置型钢增强钢管约束钢筋混凝土柱节点抗震性能研究[J].防灾减灾工程学报,2024,44(04):849-858.

WANG Qiuwei,JING Xuanguang,JING Ruiying.Seismic Performance of Steel Tube‑reinforced Concrete Column Joints Embedded with Built‑in Section Steel[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(04):849-858.
王秋维,景烜光,景瑞颖.内置型钢增强钢管约束钢筋混凝土柱节点抗震性能研究[J].防灾减灾工程学报,2024,44(04):849-858. DOI： 10.13409/j.cnki.jdpme.20230228001.

WANG Qiuwei,JING Xuanguang,JING Ruiying.Seismic Performance of Steel Tube‑reinforced Concrete Column Joints Embedded with Built‑in Section Steel[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(04):849-858. DOI： 10.13409/j.cnki.jdpme.20230228001.

摘要

采用钢管对传统RC柱进行约束，形成的钢管约束钢筋混凝土（STRC）柱具有优越的承载能力和耗能性能。但在应用于框架节点设计时，节点区域仍采用普通RC柱节点构造，可能导致节点处没有钢管约束而成为薄弱点，节点处易发生破坏。针对钢管约束钢筋混凝土（STRC）柱节点抗震性能薄弱的现状，提出采用内置型钢短柱进行增强。基于ABAQUS工作平台对具有相同构造形式的节点试件建立有限元模型，将数值计算所得破坏形态、滞回曲线和型钢应力与试验结果进行对比，两者吻合较好，在此基础上探讨内置型钢长度和轴压比对节点抗震性能的影响。结果表明：随着内置型钢长度增加，试件的承载力、极限位移和延性均有不同程度的提升，轴压比对试件受力性能影响较小。通过进一步分析试件的破坏机制、型钢抗弯性能和耗能能力，提出满足节点抗震性能需求的内置型钢长度建议取值。

Abstract

Steel tubes are used to constrain traditional reinforced concrete (RC) columns

forming steel tube-reinforced concrete (STRC) columns

which exhibit superior load-bearing capacity and energy dissipation performance. However

when applied to frame joint design

the joint area still adopts ordinary RC column node structures

potentially leading to weak points without steel tube constraints

making the joint area prone to damage. To address the issue of weak seismic performance at the joints of STRC columns

an enhancement method using built-in short steel columns was proposed. Finite element models of joint specimens with the same construction form were established based on the ABAQUS working platform and the numerical results for failure modes

hysteresis curves

and steel stress were compared with test results

showing good agreement. On this basis

the influence of the built-in steel length and axial compression ratio on the seismic performance of the joints was discussed. The results indicated that with the increasing length of the built-in steel

the load-bearing capacity

ultimate displacement

and ductility of the specimens were improved to varying degrees

while the axial compression ratio had a minor effect on the mechanical properties of the specimens. Through further analysis of the failure mechanism

bending resistance

and energy dissipation capacity of the built-in section steel

suggestions for the optimal length of the built-in section steel to meet the seismic performance requirements of the joint were proposed.

关键词

Keywords

references

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