Energy dissipation performance of self-centering concrete frame joint with energy-dissipation angle steel

HE Cheng; JIAN Bin; WU Xin; WU Pan

doi:10.11835/j.issn.2096-6717.2021.097

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Energy dissipation performance of self-centering concrete frame joint with energy-dissipation angle steel

Civil Engineering | 更新时间：2023-05-25

- Energy dissipation performance of self-centering concrete frame joint with energy-dissipation angle steel
- Journal of Civil and Environmental Engineering Vol. 45, Issue 3, Pages: 90-98(2023)
- 作者机构：
  
  1.东莞市大业施工图审查有限公司，广东东莞523000
  2.重庆大学土木工程学院，重庆400045
- 作者简介：
  
  HE Cheng (1982- ), senior engineer, research interest: concrete structure, E-mail: 2638084759@qq.com.
  JIAN Bin（corresponding author）， PhD， professor， E-mail： jianbin0215@163.com.
- 基金信息：
  
  National Natural Science Foundation of China(51878100)
- DOI：10.11835/j.issn.2096-6717.2021.097
  CLC： TU377.9
- Received：05 March 2021，
  
  Published：25 June 2023
- 稿件说明：
移动端阅览
HE Cheng, JIAN Bin, WU Xin, et al. Energy dissipation performance of self-centering concrete frame joint with energy-dissipation angle steel[J]. Journal of Civil and Environmental Engineering, 2023, 45(3): 90-98.
DOI：

HE Cheng, JIAN Bin, WU Xin, et al. Energy dissipation performance of self-centering concrete frame joint with energy-dissipation angle steel[J]. Journal of Civil and Environmental Engineering, 2023, 45(3): 90-98. DOI： 10.11835/j.issn.2096-6717.2021.097.

摘要

提出角钢耗能自复位混凝土框架设计方法，建立节点的有限元数值模型，并试验验证其有效性。对抗弯承载力比

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预应力筋不同的节点进行模拟分析，研究其在地震作用下的自复位性能、耗能能力和材料损伤等性能指标。为提高该类节点耗能能力，通过改变角钢竖肢螺杆标距做进一步研究。结果表明：角钢耗能节点具有良好的自复位性能，但耗能能力不足；减小抗弯承载力比

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，自复位能力降低、残余变形加大，但耗能能力增强。与混合连接节点相比，应适当降低节点抗弯承载力比

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的最低取值，以弥补其耗能能力的不足。角钢竖肢塑性变形是节点的主要耗能方式，且集中在竖肢的螺栓孔高度和竖肢转角位置；减小竖肢螺杆标距，且保持材料其他参数不变，将导致抗弯承载力比

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减小、截面抗弯承载力提高，节点耗能能力将随之增强。

Abstract

Design method was proposed for self-centering concrete frame joints with energy-dissipation angle steel in this study. Finite element numerical model was established and its validity was verified by experiments. After the joints with different prestressed moment capacity ratios

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were simulated

the energy dissipation capacity

self-centering performance and material damage under earthquake were studied. Changing the screw gauge distance of angle vertical leg

the measures to improve its energy-consumption capacity were further explored. The results show that the angle energy-consuming joints have perfect self-centering performance

but the energy consuming capacity is slightly insufficient. As the value of

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5.16466665

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decreases

the residual deformation increases and the self-centering ability decreases

but the energy dissipation capacity increases. Therefore

compared with the hybrid connection joint

the minimum

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5.16466665

4.65666676

value of joint should be appropriately reduced to make up for its insufficient energy dissipation. The plastic deformation of the angle vertical leg is the main energy dissipation mode of the joint

concentrating on the height of the bolt hole and the turning of the vertical leg. If the distance between the vertical screws is reduced and the other material parameters keeps constant

it will lead to decrease in

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5.16466665

4.65666676

values

increase of the bending capacity of the section and growth of the energy dissipation capacity of the joint.

关键词

Keywords

references

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