自立式钢烟囱法兰螺栓连接节点风致疲劳研究

曹宝雅; 杨冰沂; 李爱群; 邓扬; 丁幼亮

doi:10.3724/j.gyjzG24071501

自立式钢烟囱法兰螺栓连接节点风致疲劳研究

doi: 10.3724/j.gyjzG24071501

曹宝雅^1,2,
杨冰沂^1,2,
李爱群^1,2,3, ,,
邓扬^1,2,
丁幼亮³

1. 北京建筑大学土木与交通工程学院, 北京 100044;
2. 北京建筑大学大型多功能振动台阵实验室,北京 100044;
3. 东南大学土木工程学院, 南京 210096

基金项目:

国家自然科学基金资助项目(52108108, 52278290, 52378288)

北京建筑大学基本科研业务费项目(X24024)。

北京建筑大学金字塔人才工程培养计划项目(JDYC20220809)

详细信息

作者简介:
曹宝雅,博士,院聘副研究员,从事钢结构疲劳研究,caobaoya@bucea.edu.cn。

通讯作者:
李爱群,教授,liaiqun@bucea.edu.cn。

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- 文章访问数: 113
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- 被引次数: 0
出版历程
- 收稿日期: 2024-07-15
- 网络出版日期: 2025-03-28

Wind-Induced Fatigue Study of Bolted Flange Joints of Self-Standing Steel Chimneys

CAO Baoya^1,2,
YANG Bingyi^1,2,
LI Aiqun^{1,2,3
, ,},
DENG Yang^1,2,
DING Youliang³

1. School of Civil and Transportation Eng., Beijing Uni. of Civil Eng. and Architecture, Beijing 100044, China;
2. Multi-Functional Shaking Tables Lab., Beijing Uni. of Civil Eng. and Architecture, Beijing 100044, China;
3. School of Civil Eng., Southeast Uni., Nanjing 210096, China

摘要

摘要: 高耸钢结构烟囱常采用法兰盘螺栓节点进行连接,在风荷载作用下易出现疲劳裂纹。首先基于ABAQUS建立了某80 m自立式钢烟囱梁-实体多尺度有限元模型;通过MATLAB模拟风场,基于雨流计数法及Miner累积损伤准则计算了螺栓的疲劳寿命;讨论了螺栓预紧力对疲劳寿命的影响,拟合了螺栓预紧力与疲劳寿命的关系曲线;对比分析了不同强度台风作用下的法兰盘螺栓节点疲劳寿命;设计安装调频液体阻尼器(Tuned Liquid Damper,TLD),并进行了TLD减振对钢烟囱疲劳寿命的影响分析。研究结果表明:在风荷载作用下,该工程钢烟囱变截面螺栓节点寿命最低,底部螺栓节点寿命次低;法兰盘螺栓连接节点疲劳寿命随螺栓预紧力的降低而显著降低,当预紧力损失40%时,良态风下变截面处螺栓疲劳寿命将低于设计使用寿命50年;TLD减振设计安装了6层共48个圆形水箱,可有效延长螺栓疲劳寿命,在普通台风作用下,安装TLD后钢烟囱变截面处螺栓节点疲劳寿命可从32年延长至54年,台风作用下螺栓预紧力出现不同程度损失时,安装TLD可使螺栓的疲劳寿命增加50%左右。
- 钢烟囱 /
- 风荷载 /
- 螺栓 /
- 疲劳 /
- 调谐液体阻尼器
Abstract: The chimney of the towering steel structure is often connected by bolted flange joints, which are prone to fatigue cracks under wind loads. Firstly, an 80 m self-standing steel chimney girder-solid multi-scale finite element model was established based on ABAQUS. The wind field was simulated by MATLAB, and the fatigue life of the bolt was calculated based on the rainflow counting method and the Miner cumulative damage criterion. The influence of bolt preload on the fatigue life was discussed, and the relation curve between bolt preload and fatigue life was fitted. The fatigue life of bolted flange joints under the action of typhoons of different intensities was compared and analyzed. Tuned Liquid Damper (TLD) was designed and installed, and the effects of TLD damping on the fatigue life of steel chimneys were analyzed. The results showed that under the action of wind loads, the life of the bolted joint at the variable section was the lowest, and the life of the bolted joint at the bottom of the steel chimney of the project was the second. The fatigue life of bolted flange joints significantly decreased with the decrease of bolt preload.When the preload was lost by 40%, the fatigue life of bolts at the variable section under normal climate wind would be lower than the design service life of 50 years. The TLD damping design installed a total of 48 circular water tanks with 6 layers, which could effectively prolong the fatigue life of bolts. Under ordinary typhoons, after installing TLD, the fatigue life of bolt joints at the variable section of the steel chimney could be extended from 32 years to 54 years. When the bolt preload was lost to different degrees under typhoons, the fatigue life of bolts could increase by 50% after installing TLD.
- steel chimney /
- wind load /
- bolts /
- fatigue /
- Tuned Liquid Damper

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参考文献(32)

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