[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12 王卫仑12
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 Weiwen12 WANG Weilun12
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 treesfractal modelfailure modefailure wind speedwind-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.

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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