屋面绿植乔木的建筑结构风振响应的优化分析  

OPTIMIZATION OF WIND VIBRATION RESPONSES OF BUILDING STRUCTURES PLANTED ARBORS ON ROOFS

作　　者：聂竹林 区彤[2,4] 辛志勇 朱勇 汪大洋[1,4] NIE Zhulin;OU Tong;XIN Zhiyong;ZHU Yong;WANG Dayang(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;Architectural Design and Research Institute of Guangdong Province,Guangzhou 510145,China;Zhuhai Envete Engineering Testing Co.,Ltd.,Zhuhai 519000,China;Guangdong Metal Enclosure Structure Engineering Technology Research Center,Guangzhou 510006,China)

机构地区：[1]广州大学土木工程学院,广州510006 [2]广东省建筑设计研究院,广州510145 [3]珠海安维特工程检测有限公司,广东珠海519000 [4]广东省建筑金属维护系统工程技术研究中心,广州510006

出　　处：《工业建筑》2021年第3期121-127,共7页Industrial Construction

摘　　要：风荷载作用下屋顶绿植的乔木与结构之间存在极为复杂的相互作用。以广州新白云国际机场交通中心屋顶工程为背景,测试乔木的动力特性,建立乔木-结构模型,探究乔木在风荷载激励下对结构产生的动力响应,而后进行了乔木-结构模型的参数分析,并对乔木底部与树池接触的边界进行优化。分析结果表明:树干直径对结构顶层风致加速度响应敏感,较大直径的乔木在风荷载作用下可能会对结构产生大于人体舒适度限值的加速度,在屋顶设计阶段应考虑到多年后乔木增长可能带来的舒适度超限问题;在考虑土与结构作用效应时,将树池土体等效成弹簧阻尼体系可以简化树池中乔木与土壤的复杂相互作用,并验证了这种优化方法的合理性和可行性。There is extremely complex interaction between arbors planted on roofs of structures and the structures under wind loads.Base on the roof project of New Baiyun International Airport Traffic Center in Guangzhou,the dynamic characteristics of arbors were tested,a tree-structure interaction model was constructed,the dynamic responses of the structure under the excitation of wind action and arbor vibration were explored,and the parameter analysis of the model was conducted based on model optimization on the interface of arbor bases and plant pools.The analysis results showed that the diameters of arbors were sensitive to the wind-induced acceleration response on the top floor of the structure.Larger diameter arbors would cause the acceleration of structures greater than the limit for the human comfort degrees under the wind load.The problem of comfort degrees out of limits caused by the tree growth should be taken into account in the design of the roof engineering.Considering the SSI effect,the soil in plant pools could be taken as a spring damping system to simplify the complex interaction between trees and soil in the tree pool.The optimization method was verified to be reasonable and feasible.

关 键 词：大型乔木 动力特性测试 土与结构作用效应 风振响应 参数分析 

分 类 号：TU311.3[建筑科学—结构工程]