1.武汉理工大学土木工程与建筑学院,湖北 武汉430070
2.武汉理工大学海南研究院,海南 三亚572025
3.中建三局工程设计有限公司,湖北 武汉430070
刘晖(1972—),女,教授,博士。主要从事结构风工程和结构损伤识别研究。E-mail:drliuh@263.net
收稿:2022-09-02,
修回:2023-01-14,
纸质出版:2024-02-15
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刘晖,黄昌昊,吉柏锋.不均匀积雪致大跨网架结构局部损伤分析[J].防灾减灾工程学报,2024,44(01):99-108.
LIU Hui,HUANG Changhao,JI Baifeng.Local Damages of Long‑span Grid Structure Caused by Uneven Snow Cover[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(01):99-108.
刘晖,黄昌昊,吉柏锋.不均匀积雪致大跨网架结构局部损伤分析[J].防灾减灾工程学报,2024,44(01):99-108. DOI: 10.13409/j.cnki.jdpme.20220902002.
LIU Hui,HUANG Changhao,JI Baifeng.Local Damages of Long‑span Grid Structure Caused by Uneven Snow Cover[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(01):99-108. DOI: 10.13409/j.cnki.jdpme.20220902002.
网架结构管球连接处局部损伤是此类结构的重要安全隐患。在风致雪漂移引起的不均匀积雪荷载作用下,局部损伤会加剧,最终导致结构局部破坏。因此很有必要分析不均匀积雪荷载作用下带伤服役网架结构局部损伤劣化情况。采用CFD数值模拟技术,以一正放四角锥网架结构为研究背景,分析了在90°风向角、12 m/s风速下,持续降雪24 h中网架结构屋面不均匀积雪分布的变化情况,并建立可表征网架结构管球连接处存在裂纹损伤的多尺度模型,分析了网架结构节点存在不同裂纹尺寸局部损伤时,不均匀积雪致网架结构局部损伤劣化程度。结果表明:网架结构风致积雪不均匀程度非常显著,而且当网架结构管球连接处存在局部裂纹损伤时,在降雪中后期,有管球连接损伤的节点大多都出现了不同程度的裂纹扩展,节点为最不利分布的穿透型裂纹时,裂纹扩展最大为15.64 mm。说明在持续特大降雪这种极端荷载作用下,带伤服役网架结构局部损伤将进一步加剧,危及结构使用安全。
Local damage of the pipe-ball joints in the grid structure poses a significant safety hazard. Such local damage will be aggravated under uneven snow cover caused by wind-induced snow drifting, eventually leading to partial structural failure. Therefore, it is necessary to analyze the degradation of the structure with local damage under the action of uneven snow load. The CFD numerical simulation technology is adopted to analyze the variation of uneven snow distribution on the roof of an orthogonal quadrangular grid structure under the continuous snowfall for 24 hours at the 90°wind direction and 12m/s wind speed. Then a multi-scale numerical model is established to characterize the crack damage at the pipe-ball joints of the grid structure, and the local damage deterioration degree of the grid structure caused by uneven snow cover is analyzed when there is local damage of different crack sizes at the joints of the grid structure. The results show that the uneven degree of the wind-induced snow cover on the grid structure is very significant, and when there are local crack damages at the pipe-ball joints of the grid structure, most of the joints with damage have different degrees of crack propagation in the middle and late stages of snowfall. The maximum crack propagation is 15.64 mm when the joint damage is the penetrating cracks with the most unfavorable distribution. It indicates that under the extreme load of continuous heavy snowfall, the local damages in the grid structure with existing cracks will be further aggravated, endangering the service safety of the structure.
南波 , 武岳 . 工程雪灾害分析与加固研究 [J]. 空间结构 , 2013 , 19 ( 2 ): 70 - 74 .
Nan B , Wu Y . Analysis of engineering snow disaster and research on strengthening [J]. Spatial Structures , 2013 , 19 ( 2 ): 70 - 74 . (in Chinese)
刘艳艳 , 唐晓春 , 黄友钦 . 风雪灾害天气下的结构稳定研究进展 [J]. 低温建筑技术 , 2014 , 36 ( 9 ): 52 - 54 .
Liu Y Y , Tang X C , Huang Y Q . Advance in structural stability in the disaster climate of heavy snowstorm [J]. Low Temperature Architecture Technology , 2014 , 36 ( 9 ): 52 - 54 . (in Chinese)
倪桂和 . 基于荷载规范的轻钢结构雪致破坏原因研究 [D]. 广州 : 广州大学 , 2016 .
Ni G H . Studies on snow-induced collapse of light-steel structure based on load codes [D]. Guangzhou : Guangzhou University , 2016 . (in Chinese)
建筑结构设计荷载规范 : GB 50009—2012 [S]. 北京 : 中国建筑工业出版社 , 2012 .
洪财滨 . 典型形式大跨度屋盖风致雪漂移的数值模拟研究 [D]. 哈尔滨 : 哈尔滨工业大学 , 2012 .
Hong C B . Numerical simulation of snow drifting on typical form of long-span roofs [D]. Harbin : Harbin Institute of Technology , 2012 . (in Chinese)
周晅毅 , 刘长卿 , 顾明 . 拉格朗日方法在风雪运动模拟中的应用 [J]. 工程力学 , 2015 , 32 ( 1 ): 36 - 42 .
Zhou X Y , Liu C Q , Gu M . Application of lagrangian method to snowdrift model [J]. Engineering Mechanics , 2015 , 32 ( 1 ): 36 - 42 . (in Chinese)
Sato T , Uematsu T , Nakata T , et al . Three dimensional numerical simulation of snowdrift [J]. Journal of Wind Engineering and Industrial Aerodynamics , 1993 , 46/47 : 741 - 746 .
Sun X Y , He R J , Wu Y , et al . Numerical simulation of snowdrift on a membrane roof and the mechanical performance under snow loads [J]. Cold Regions Science and Technology , 2018 , 150 ( 6 ): 15 - 24 .
黄友钦 , 顾明 . 风雪耦合作用下单层柱面网壳的动力稳定 [J]. 工程力学 , 2011 , 28 ( 11 ): 210 - 217 .
Huang Y Q , Gu M . Dynamic instability of single-layer reticulated cylindrical shell under coupled wind and snow loads [J]. Engineering Mechanics , 2011 , 28 ( 11 ): 210 - 217 . (in Chinese)
曹冀鲁 , 任庆烽 . 降雪量与降雪深度 [EB/OL]. [ 2010-01-19 ]. http://www.cma.gov.cn/2011xzt/2012zhuant/20120302/2012030205/201203020502/201203/t20120 306_163750.html http://www.cma.gov.cn/2011xzt/2012zhuant/20120302/2012030205/201203020502/201203/t20120306_163750.html
Cao J L , Ren Q F . Snow amount and depth [EB/OL]. [ 2010-01-19 ]. http://www.cma.gov.cn/2011xzt/2012zhuant/20120302/2012030205/201203020502/201203/t20120306_163750.html http://www.cma.gov.cn/2011xzt/2012zhuant/20120302/2012030205/201203020502/201203/t20120306_163750.html (in Chinese)
建筑工程风洞试验方法标准 : JGJ/T 338—2014 [S]. 北京 : 中国建筑工业出版社 , 2014 .
孙晓颖 , 洪财滨 , 武岳 , 等 . 建筑物周边风致雪漂移的数值模拟研究 [J]. 工程力学 , 2014 , 31 ( 4 ): 141 - 146
Sun X Y , Hong C B , Wu Y , et al . Numerical simulation of snow drifting around building model [J]. Engineering Mechanics , 2014 , 31 ( 4 ): 141 - 146 . (in Chinese)
Walters K D , Cokljat D . A three-equation eddy-viscosity model for reynolds-averaged navier-stokes simulations of transitional flow [J]. Journal of Fluids Engineering: Transactions of the ASME , 2008 , 130 ( 12 ): 121401 .
Kind R J . Mechanics of aeolian transport of snow and sand [J]. Journal of Wind Engineering &Industrial Aerodynamics , 1990 , 36 ( 1-3 ): 855 - 866 .
Naaim M , Naaim-Bouvet F , Martinez H . Numerical simulation of drifting snow: erosion and deposition models [J]. Annals of Glaciology , 1998 , 26 : 191 - 196 .
Pomeroy J W , Male D H . Steady-state suspension of snow [J]. Journal of Hydrology , 1992 , 136 ( 1-4 ): 275 - 301 .
刘晖 , 黄昌昊 , 吉柏锋 . 风致不均匀积雪的大跨网架结构工作状态分析 [J]. 建筑科学与工程学报 , 2023 , 40 ( 3 ): 102 - 110 .
Liu H , Huang C H , Ji B F . Working state analysis of long span structure considering wind-induced uneven snow cover [J]. Journal of Architecture and Civil Engineering , 2023 , 40 ( 3 ): 102 - 110 . (in Chinese)
熊勋 , 杨莹 , 汪舟 . 基于FRANC3D和ABAQUS联合仿真三维疲劳裂纹扩展分析及寿命预测 [J]. 武汉理工大学学报(交通科学与工程版) , 2020 , 44 ( 3 ): 506 - 512 .
Xiong X , Yang Y , Wang Z . Three dimensional fatigue crack growth analysis and life prediction based on joint simulation of FRANC3D and ABAQUS [J]. Journal of Wuhan University of Technology(Transportation Science & Engineering) , 2020 , 44 ( 3 ): 506 - 512 . (in Chinese)
蔡建国 , 王蜂岚 , 韩运龙 . 大跨空间结构重要构件评估实用方法 [J]. 湖南大学学报(自然科学版) , 2011 , 38 ( 3 ): 7 - 11 .
Cai J G , Wang F L , Han Y L . Practical method for the evaluation of important structural components of long-span space structures [J]. Journal of Hunan University(Nature Sciences) , 2011 , 38 ( 3 ): 7 - 11 . (in Chinese)
Knowles J K , Sternberg E . On a class of conservation laws in linearized and finite electrostatics [J]. Archive for Rational Mechanics and Analysis , 1972 , 44 ( 3 ): 187 - 211 .
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