摘要
为解决树木在风载荷下易发生安全事故,造成人员伤亡和财产损失的问题,研究一种基于无损重构技术和有限元分析的风载荷下树木稳定性的评估方法,通过探地雷达(Ground Penetrating Radar, GPR)无损获取根系构型,结合三维重构技术和阻力公式构建风载荷下的树木模型,根据模型的有限元分析结果评估树木稳定性状况。通过仿真和对古侧柏(Platycladus orientalis)现场试验,分析不同根系构型和不同土壤参数对树木稳定性的影响。结果表明,水平浅根和土壤参数是影响树木稳定性的2个重要因素,得到与现有研究中相同的等效应力变化趋势。研究证明GPR所获取的根系构型可以作为树木稳定性的重要评价指标,验证研究结果在实际树木风险评估工作中的可行性。
In order to solve the problem that trees are prone to safety accidents under wind loads,which cause casualties and property losses,a method of assessing the stability of trees under wind loads based on nondestructive reconstruction technology and finite element analysis was investigated,in which the root system configuration was obtained nondestructively by Ground Penetrating Radar(GPR),and a tree model was constructed by combining the three-dimensional reconstruction technology and the resistance formula under wind load.The effects of different root configurations and soil parameters on tree stability were analyzed through simulation and field tests on Platycladus orientalis,and the results showed that horizontal shallow roots and soil parameters were two important factors affecting tree stability,and the same trend of equivalent stress change was obtained as that in the existing study.The study proved that the root configuration obtained by GPR can be used as an important evaluation index of tree stability,and verifies the feasibility of the results of the study in the actual tree risk assessment work.
作者
谭旭
张潇巍
李爽
吕生华
徐凌飞
文剑
TAN Xu;ZHANG Xiaowei;LI Shuang;L Shenghua;XU Lingfei;WEN Jian(The School of Technology,Beijing Forestry University,Beijing 100083,China)
出处
《森林工程》
北大核心
2024年第2期127-141,共15页
Forest Engineering
基金
国家自然科学基金资助项目(32071679)
北京市自然科学基金项目(6202023)。
