Hysteretic behavior of fabricated H-shaped steel web opening energy dissipation support

HUANG Chenkai; ZHAO Baocheng

doi:10.11835/j.issn.2096-6717.2021.038

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Hysteretic behavior of fabricated H-shaped steel web opening energy dissipation support

Civil Engineering | 更新时间：2023-06-25

- Hysteretic behavior of fabricated H-shaped steel web opening energy dissipation support
- Journal of Civil and Environmental Engineering Vol. 45, Issue 1, Pages: 186-198(2023)
- 作者机构：
  
  苏州科技大学江苏省结构工程重点实验室，江苏苏州 215011
- 作者简介：
  
  HUANG Chenkai (1995- ), main research interest: seismic performance of steel structure, E-mail: 897412336@qq.com.
  ZHAO Baocheng （correspondence author）， PhD， professor， E-mail： 690056365@qq.com.
- 基金信息：
  
  National Natural Science Foundation of China(51878432);Postgraduate Research & Practice Innovation Program of Jiangsu Province(KYCX19_2024)
- DOI：10.11835/j.issn.2096-6717.2021.038
  CLC： TU391
- Received：11 December 2020，
  
  Published：25 February 2023
- 稿件说明：
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HUANG Chenkai, ZHAO Baocheng. Hysteretic behavior of fabricated H-shaped steel web opening energy dissipation support[J]. Journal of Civil and Environmental Engineering, 2023, 45(1): 186-198.
DOI：

HUANG Chenkai, ZHAO Baocheng. Hysteretic behavior of fabricated H-shaped steel web opening energy dissipation support[J]. Journal of Civil and Environmental Engineering, 2023, 45(1): 186-198. DOI： 10.11835/j.issn.2096-6717.2021.038.

摘要

装配式H型钢腹板开孔耗能支撑是由腹板开孔H型钢和传力槽钢通过螺栓连接组成的新型耗能支撑，能有效避免支撑构件失稳。为研究这种支撑的耗能能力及破坏机理，对试件进行低周往复加载试验及有限元模拟分析。结果表明：装配式H型钢腹板开孔耗能支撑滞回曲线饱满，耗能能力强，变形能力好。在轴向荷载作用下，试件主要依靠开孔腹板孔间短柱进入塑性耗能，在加载过程中，孔间短柱端部为薄弱部位，首先进入塑性，并最先发生断裂，随着加载的深入，孔间短柱中间部位进入塑性的面积越来越大。加载过程中，螺栓与槽钢始终处于弹性状态。试件最终因孔间短柱断裂导致破坏。H型钢耗能腹板长度相同时，腹板宽度越宽、孔间短柱高宽比越大，耗能支撑承载力与刚度越小、变形能力越好，孔间短柱高宽比在5~8之间较合理。建议长圆孔端部圆弧到螺栓孔中心最短距离控制在1.2

~1.5

之间。改变长圆孔圆弧半径对支撑的力学性能影响很小。H型钢腹板宽度相同时，腹板长度越大，承载力与刚度越大。给出了装配式H型钢腹板开孔耗能支撑的设计方法与极限承载力公式。

Abstract

The fabricated H-shaped steel web opening energy dissipation support is a new type of energy-consuming support composed of web opening H-shaped steel and force transmission channel steel connected by bolts

which can effectively avoid the instability of supporting members. In order to study the energy dissipation capacity and failure mechanism of this support

low-cycle reciprocating loading tests and finite element simulation analysis were performed on the specimens. The results show that the fabricated H-shaped steel web opening energy dissipation support has a full hysteresis curve

strong energy dissipation capacity and good deformability. Under the action of axial load

the test piece mainly relies on the short columns between the holes of the open web to enter the plastic energy dissipation. The ends of the short columns between the holes are the weak parts

which first enters the plastic during the loading process

and the fracture occurs first. With the deepening of loading

the plastic area in the middle part of the short column between holes becomes large and large. During the loading process

the bolts and channel steel are always in an elastic state. The specimen is eventually damaged due to the fracture of the short column between the holes. When the length of H-shaped steel energy dissipating web is the same

the wider the web width

the greater the height-width ratio of the short column between the holes

the smaller the bearing capacity and stiffness of the energy dissipation support

the better the deformation ability

and the short column height-width ratio between the holes in the range of 5-8 is more reasonable. It is recommended that the shortest distance from the arc at the end of the oblong hole to the center of the bolt hole be controlled between 1.2

and 1.5

. Changing the arc radius of the oblong hole has little effect on the mechanical properties of the support. When the width of the H-beam web is the same

the greater the web length

the greater the bearing capacity and stiffness. The design method and ultimate bearing capacity formula of fabricated H-shaped steel web opening energy dissipation support are give.

关键词

Keywords

references

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