空间网架结构焊接球节点风致多轴高周疲劳分析

刘晖; 周飘; 陈世超; 郭佳凡; 瞿伟廉

doi:10.13204/j.gyjzG21032303

空间网架结构焊接球节点风致多轴高周疲劳分析

doi: 10.13204/j.gyjzG21032303

1. 武汉理工大学土木工程与建筑学院, 武汉 430070;
2. 三亚旅游文化投资集团有限公司, 海南三亚 572023

基金项目:

国家自然科学基金重点项目（51438002）。

详细信息

作者简介:
刘晖,女,1972年出生,工学博士,教授。电子信箱:drliuh@263.net

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- 文章访问数: 93
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- 被引次数: 0
出版历程
- 收稿日期: 2021-03-23
- 网络出版日期: 2023-10-17

Wind-Induced Multiaxial High-Cycle Fatigue Analysis of Welded Spherical Joints of Spatial Grid Structures

1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China;
2. Sanya Tourism and Culture Investment Group, Sanya 572023, China

摘要

摘要: 在风荷载作用下的空间网架结构焊接球节点的疲劳为多轴高周疲劳，为保证结构风致安全，需对其进行风致多轴高周疲劳分析。首先进行焊接件单、多轴高周疲劳试验，获得焊材的基于双参数临界面法的多轴高周疲劳损伤寿命模型；再基于风洞试验数据，对网架结构进行风致响应分析，并采用子结构分析法，建立所分析焊接节点的精细化有限元模型，获得各焊接节点危险点的应力时程和等效应力时程；然后采用雨流计数法获得各个循环的起点和终点，在每个循环中确定原始应力时程并采用搜索方法确定临界面；最后基于焊材多轴高周疲劳损伤寿命模型，根据Miner线性损伤累积准则得到所有循环的累积疲劳损伤值，在此基础上预测出节点发生疲劳损伤的起始寿命。以武汉游泳馆屋顶网架结构为工程背景，对其不同位置节点进行了风致疲劳分析。结果表明：迎风面、背风面和中间节点的疲劳损伤起始寿命都远小于结构的使用寿命。说明焊接节点在结构使用年限内会发生风致疲劳损伤，应当引起工程界的关注和重视。
- 焊接球节点 /
- 风致疲劳 /
- 多轴高周疲劳 /
- 临界面 /
- 空间网架结构
Abstract: Because of the multiaxial high-cycle fatigue characteristics of welded spherical joints under wind load, it is necessary to do some research on the wind-induced multiaxial high-cycle fatigue of the joints in order to ensure the wind safety of spatial grid structure. A multiaxial high-cycle fatigue analysis methodology was proposed. Firstly, the high-cycle fatigue tests of weldments under uniaxial and multiaxial loading were carried out, and obtained the multiaxial high-cycle fatigue damage life model of weldments based on two-parameter critical surface method. Secondly, based on the wind tunnel test data,the wind-induced response of the grid structure was analyzed, meanwhile, the refined finite element model of the welded joints was established by using the substructure analysis method, so as to obtain the stress time-history and equivalent stress time-history of the dangerous points of each welded joint. The rainfall counts were then performed to determine the starting and ending points of each cycle and its original stress time-history, accordingly identify the critical surfaces in each cycle by using the search method. Finally, based on the multiaxial high-cycle fatigue damage life model obtained in the test, and the cumulative fatigue damage values of all the cycles were calculated according to Miner's linear accumulation criterion, on the basis of which the starting life of the joint was predicted when fatigue damage occurred. The wind-induced fatigue analysis was carried out on the joints of the roof grid structure of Wuhan Natatorium at different locations. The results indicated that the fatigue damage starting life of the windward joints, leeward joints and intermediate joints was far less than the service life of the structure. Therefore, wind-induced fatigue damage might occur on the welded joints within the service life of structure, which should be concerned in the engineering field.
- welded spherical joint /
- wind-induced fatigue /
- multiaxial high-cycle fatigue /
- critical plane /
- spatial grid structure

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参考文献(24)

[1]	廖芳芳, 王伟, 李文超, 等. 钢结构节点断裂的研究现状[J]. 建筑科学与工程学报, 2016, 33(1):67-75.
[2]	刘晖, 王钱, 陈世超, 等. 网架结构节点焊缝损伤识别2步法[J]. 中国安全科学学报, 2018, 28(12):7-13.
[3]	叶继红, 申会谦. 风荷载下空间网格结构疲劳性能[J]. 东南大学学报(自然科学版), 2016, 46(4):842-847.
[4]	N'DIAYE A, HARIRI S, PLUVINAGE G, et al. Stress concentration factor analysis for welded, notched tubular T-joints under combined axial, bending and dynamic loading[J]. International Journal of Fatigue, 2009, 31(2):367-374.
[5]	黄铭枫, 叶何凯, 楼文娟, 等. 考虑风速风向分布的干煤棚结构风振疲劳分析[J]. 浙江大学学报(工学版), 2019, 53(10):1916-1926..
[6]	朱正宇, 何国求, 陈成澍, 等. 多轴非比例加载高周疲劳研究进展[J]. 同济大学学报(自然科学版), 2006, 34(9):1221-1225,1250.
[7]	张晓阳, 刘金勇, 曲先强. 焊接接头多轴高周疲劳评估方法[J]. 大连海事大学学报, 2014, 40(3):108-112.
[8]	武奇, 邱惠清, 王伟生. 基于结构应力的焊接接头疲劳分析[J]. 焊接学报, 2009, 30(3):101-105 ,118.
[9]	黄如旭. 复杂焊接接头多轴疲劳强度评估的等效热点应力法[D].大连:大连理工大学, 2011.
[10]	SUSMEL L. Three different ways of using the Modified Wöhler Curve Method to perform the multiaxial fatigue assessment of steel and aluminium welded joints[J]. Engineering Failure Analysis, 2009, 16(4):1074-1089.
[11]	SUSMEL L, TOVO R, BENASCIUTTI D. A novel engineering method based on the critical plane concept to estimate the lifetime of weldments subjected to variable amplitude multiaxial fatigue loading[J]. Fatigue & Fracture of Engineering Materials & Structures, 2009, 32(5):441-459.
[12]	SUSMEL L. Nominal stresses and Modified Wöhler Curve Method to perform the fatigue assessment of uniaxially loaded inclined welds[J].Journal of Mechanical Engineering Science,2014, 228(16):2871-2880.
[13]	THÉVENET D, GHANAMEH M F, ZEGHLOUL A. Fatigue strength assessment of tubular welded joints by an alternative structural stress approach[J]. International Journal of Fatigue, 2013, 51(6):74-82.
[14]	MINER M A. Cumulative damage in fatigue[J]. Journal of Applied Mechanics, 1945(3):159-164.
[15]	刘刚, 黄一, 赵一阳. 基于临界面理论的焊接结构多轴疲劳寿命评估方法[J]. 船舶力学, 2013, 17(5):494-501.
[16]	SUSMEL L. Four stress analysis strategies to use the Modified Wöhler Curve Method to perform the fatigue assessment of weldments subjected to constant and variable amplitude multiaxial fatigue loading[J]. International Journal of Fatigue, 2014, 67:38-54.
[17]	BAGNI C, ASKES H, SUSMEL L. Gradient elasticity:a transformative stress analysis tool to design notched components against uniaxial/multiaxial high-cycle fatigue[J]. Fatigue & Fracture of Engineering Materials & Structures, 2016, 39(4):1012-1029.
[18]	ANDERA C,ANDERA S,SABRINA V. A multiaxial fatigue criterion for random loading[J]. Fatigue & Fracture of Engineering Materials & Structures, 2003, 26(6):515-522.
[19]	包名, 尚德广, 陈宏. 一种新的随机多轴疲劳寿命预测方法[J]. 机械强度, 2012, 34(5):737-743.
[20]	全国钢标准化技术委员会.金属材料疲劳试验轴向力控制方法:GB/T 3075-2008[S]. 北京:中国标准出版社, 2008.
[21]	全国钢标准化技术委员会.金属材料扭应力疲劳试验方法:GB/T 12443-2007[S]. 北京:中国标准出版社,2007.
[22]	中华人民共和国住房和城乡建设部.建筑结构荷载规范:GB 50009-2012[S]. 北京:中国建筑工业出版社, 2012.
[23]	舒新玲, 周岱. 风速时程AR模型及其快速实现[J]. 空间结构, 2003, 9(4):27-32 ,46.
[24]	刘锡良, 周颖. 风荷载的几种模拟方法[J]. 工业建筑, 2005, 35(5):81-84.