[1]李利孝,蔡鸣,宋健,等.深圳市阴香类行道树风致失效模式及失效风速预测研究[J].自然灾害学报,2022,31(02):148-155.[doi:10.13577/j.jnd.2022.0216]
　LI Lixiao,CAI Ming,SONG Jian,et al.Study on the wind-induced failure mode and failure wind speeds of Cinnamomum burmannii street trees in Shenzhen[J].,2022,31(02):148-155.[doi:10.13577/j.jnd.2022.0216]
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深圳市阴香类行道树风致失效模式及失效风速预测研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
31
期数:
2022年02期
页码:
148-155
栏目:
出版日期:
2022-04-28

文章信息/Info

Title:
Study on the wind-induced failure mode and failure wind speeds of Cinnamomum burmannii street trees in Shenzhen
作者:
李利孝1;  蔡鸣1;  宋健1;  李伟文1; 2;  王卫仑1; 2
1. 深圳大学 土木与交通工程学院, 广东 深圳 518060;
2. 深圳大学 结构工程研究所, 广东 深圳 518060
Author(s):
LI Lixiao1;  CAI Ming1;  SONG Jian1;  LI Weiwen1; 2;  WANG Weilun1; 2
1. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China;
2. Institute of Structural Engineering, Shenzhen University, Shenzhen 518060, China
关键词:
行道树; 分形模型; 破坏模式; 失效风速; 抗风性能
Keywords:
street trees; fractal model; failure mode; failure wind speed; wind-resistant performance
分类号:
TU4；X43
DOI:
10.13577/j.jnd.2022.0216
摘要:
为了探究行道树的抗风性能和风灾易损性，文中选取了深圳市具有代表性的阴香类行道树模型作为研究对象，依据分形理论并考虑其空间形态构建了行道树的有限元模型；利用ANASYS-Work-bench平台模拟行道树模型的风荷载，并探讨了该行道树模型在不同等级风速作用下的风振响应特性和破坏模式。研究发现：行道树主干的最大切应力出现在最低处树枝与主干连接处，最大弯矩出现在树根端部位置；剪切破坏是引起该类型行道树破坏的主要形式，行道树结构失效的位置集中发生在枝条连接处；随着枝条逐渐损失，行道树承受的总风荷载减少，失效风速显著增加；考虑行道树的空间形态和分枝影响构建的有限元模型能较为准确地预测典型行道树的失效风速和破坏形态。
Abstract:
In order to evaluate the wind resistance performance and wind disaster vulnerability of street trees,this study selects the representative Cinnamomum burmanni street trees in Shenzhen as the research object. Based on fractal theory and spatial shape of the street trees,a finite element model was built.Wind load of the street tree model, and the wind-induced vibration response characteristics and failure modes of the street tree model was simulated and discussed under different levels of wind speeds by using the Anasys-Workbench platform. The study shows that:the maximum shear stress of the main trunk of the street tree appeared at the junction of the lowest branch and trunk,and the maximum bending moment appeared at the end of the tree root;shear failure is the main failure mode of the Cinnamomum burmanni street trees,and the failure of the street trees mainly occurred at the joint of branches; With the loss of branches,the total wind load on the street trees decreased and the failure wind speed increased significantly;the finite element model considering the spatial shape of the street trees and the influence of branches can accurately predict the failure wind speed and failure mode of the typical Cinnamomum burmanni street trees.

参考文献/References:

[1] 彭勇波, 艾晓秋, 承颖瑶.风致树木倒伏研究进展[J].自然灾害学报, 2016, 25(5):167-175. PENG Yongbo,AI Xiaoqiu,CHENG Yingyao.Advances in research on wind-induced trees lodging[J]. Journal of Natural Disasters, 2016, 25(5):167-175.(in Chinese)
[2] Greenhill G. Determination of the greatest height consistent with stability that a vertical pole or mast can be made, and the greatest height to which a tree of given proportions can grow[C]//Proceedings of the Cambridge Philosophical Society,1881(4):65-73.
[3] Spatz H C,Speck O. Oscillation frequencies of tapered plant stems[J]. American Journal of Botany,2002,89(1):1-11.
[4] Baker C J. Measurements of the natural frequencies of trees[J]. Journal of Experimental Botany,1997,48(310):1125-1132.
[5] Sellier D,Brunet Y,Fourcaud T. A numerical model of tree aerodynamic response to a turbulent airflow[J]. Forestry,2008,81(3):279- 297.
[6] Ciftci C,Brena S F. Kane B,et al. The effect of crown architecture on dynamic amplification factor of an open-grown sugar maple(Acersaccharum L.)[J]. Trees,2013,27(4):1175-1189.
[7] Dupont,Sylvain. A simple wind-tree interaction model predicting the probability of wind damage at stand level[J]. Agricultural and Forest Meteorology,2016,224:49-63.
[8] 宫晓芳. 马尾松树木力学建模及在冰雪荷载下应力分析[D]. 北京:北京林业大学,2009. GONG Xiaofang. Building Mechanical Model and Stress Analysis under Ice and Snow Load of Masson Pine[D]. Beijing:Beijing Forestry University, 2009(. in Chinese)
[9] 艾晓秋,彭勇波,承颖瑶. 城市行道树动力学特性与风致破坏分析[J]. 自然灾害学报,2018,27(1):27-32. AI Xiaoqiu,PENG Yongbo,CHENG Yingyao. Wind-induced failure and dynamical behaviors of urban trees[J]. Journal of Natural Disasters, 2018,27(1):27-32.(in Chinese)
[10] 李正农, 蔡笑影.基于格子Boltzmann法的树木流场数值模拟[J].广西大学学报, 2019, 44(1):269-278. LI Zhengnong,CAI Xiaoying. Numerical simulation of tree flow field based on lattice Boltzmann method[J]. Journal of Guangxi University, 2019, 44(1):269-278.(in Chinese)
[11] 李正农, 李枫, 陈斌, 等.树木风荷载与流场特性的风洞试验[J].林业科学, 2020, 56(8):173-180. LI Zhengnong,LI Feng,CHEN Bin, et al. Wind tunnel test on wind load and flow field characteristics of trees[J]. Scientia Silvae Sinicae,2020, 56(8):173-180(. in Chinese)
[12] 吴显坤. 台风灾害对深圳城市园林树木的影响和对策[D]. 南京:南京林业大学,2007. WU Xiankun. Effect of Typhoon Disasters to Urban Landscape Trees and Typhoon Disaster-reducing Strategies in Shenzhen[D]. Nanjing:Nanjing Forestry University,2007.(in Chinese)
[13] Gardiner B A. Mechanical Characteristics of Sitka Spruce[M]. Ediburgh, UK:Forestry Commission,1989.
[14] 陶嗣巍. 树木风振特性试验研究与有限元分析[D]. 北京:北京林业大学,2013. TAO Siwei. Research on trees Wind-induced Vibration Characteristics Based on Testing Methods and FEM simulation[D]. Beijing:Beijing Forestry University,2013.(in Chinese)
[15] Moore J R,Maguire D A. Natural sway frequencies and damping ratios of trees:concepts,review and synthesis of previous studies[J]. Trees, 2004,18(2):195-203.
[16] 王秀丽, 韩飞.泥石流作用下新型楔挡分流结构的流-固耦合动力分析[J].自然灾害学报, 2014, 23(2):61-66. WANG Xiuli,HAN Fei. Flow-solid coupling dynamic analysis of new-type wedge block shunt structure under effect of debris flow[J]. Journal of Natural Disasters, 2014, 23(2):61-66.(in Chinese)
[17] Saunderson S E T,Baker C J,England A. A dynamic model of the behavior of sitka spruce in high winds[J]. Journal of Theoretical Biology, 1999, 200(3):249-259.
[18] 张鳌,冀晓东,丛旭, 等. 基于线性滤波法的单株林木抗风有限元模拟[J]. 北京林业大学学报,2016,38(2):1-9. ZHANG Ao,JI Xiaodong,CONG Xu,et al. Finite element modeling of wind resistance of single trees based on linear filtering method[J]. Journal of Beijing Forestry University,2016,38(2):1- 9.(in Chinese)
[19] 徐博瀚,蔡竞. 木材强度准则的研究进展[J]. 土木工程学报,2015,48(1):64- 73. XU Bohan,CAI Jing. State-of-the-art in strength criteria for wood[J]. China Civil Engineering Journal,2015,48(1):64- 73.(in Chinese)
[20] 鹿振友, 孙立谔.速生毛白杨杂交新品种力学性质研究[J].北京林业大学学报, 1995, 17(1):68-71. LU Zhenyou,SUN Lie. Study on the mechanical properties of fast-growing poplar hybrids[J]. Journal of Beijing Forestry University,1995, 17(1):68-71.(in Chinese)
[21] 何定颖, 李正农.行道树风致响应的风洞试验研究[J].自然灾害学报, 2019, 28(3):44-53. HE Dingying,LI Zhengnong. Wind tunnel test on wind-induced responses of roadside trees[J]. Journal of Natural Disasters, 2019, 28(3):44- 53.(in Chinese)

相似文献/References:

[1]艾晓秋,彭勇波,承颖瑶.城市行道树动力学特性与风致破坏分析[J].自然灾害学报,2018,27(01):027.[doi:10.13577/j.jnd.2018.0104]
　AI Xiaoqiu,PENG Yongbo,CHENG Yingyao.Wind-induced failure and dynamical behaviors of urban trees[J].,2018,27(02):027.[doi:10.13577/j.jnd.2018.0104]

备注/Memo

备注/Memo:
收稿日期:2021-1-13;改回日期:2021-9-30。
基金项目:国家自然科学基金面上项目(52178491);深圳大学结构工程研究所开放研究基金项目(SZRISE-19)
作者简介:李利孝(1984-),男,研究员,博士,主要从事结构风工程研究.E-mail:lilixiao@szu.edu.cn
通讯作者:李伟文(1967-),男,教授,博士,主要从事新型FRP复合结构研究.E-mail:liweiwen@szu.edu.cn
更新日期/Last Update: 1900-01-01