摘要
铝合金网壳具有自重轻、耐腐蚀性好等优点,可以很好地满足复杂建筑造型的要求,近年来在各类大型公共建筑当中得到大量应用.针对装配式空心毂节点铝合金单层球面网壳,采用CFD数值模拟方法,考虑双向流固耦合作用,研究了不同矢跨比、跨度和风攻角条件下,节点刚度变化对网壳表面风压分布特征和风振响应的影响.研究结果表明:当跨度、矢跨比和风攻角不变时,铝合金球面网壳表面风压分布特征不会随节点刚度发生变化,但最大风压系数绝对值将显著增大.网壳节点刚度减小时,节点风振系数和网壳平均位移风振系数增大.当节点考虑为半刚接时,节点刚度每减小50%,网壳节点位移响应均值、均方差及位移波动幅值将增大50~100%,网壳最大位移增大25~70%.铝合金球面网壳矢跨比越小、跨度越小,节点刚度对网壳表面风压系数和节点位移响应的影响越显著.
Aluminum latticed domes have the advantages of light weight and good corrosion resistance,which meet the requirements of complex architectural modeling well.In recent years,they have been widely used in various large-scale public buildings.The influence of joint stiffness on the wind pressure distribution and wind-induced response of single-layer aluminum latticed domes with assembled hub joints under different rise-span ratio,span,wind attack angle conditions was studied by using CFD numerical simulation considering two-way fluid-structure coupling.The results show that when the span,rise-span ratio and wind attack angle are constant,the surface wind pressure distribution of aluminum alloy latticed domes will not change with the joint stiffness,but the absolute value of the maximum wind pressure coefficient will increase significantly.The wind-induced vibration coefficient at each joint and the average displacement wind-induced vibration coefficient increase with the decrease of the joint stiffness.When the joint is considered to be semi-rigid,the mean value,mean square deviation and amplitude of the displacement fluctuation will increase by 50%~100%and the maximum displacement of the dome will increase by 25%~70%when the joint stiffness is reduced about a half.The influence of joint stiffness on the displacement response of joints and the wind pressure coefficient is more significant when the rise-span ratio or span is reduced.
作者
韩庆华
张华彤
徐颖
HAN Qing-hua;ZHANG Hua-tong;XU Ying(School of Civil Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Coast Civil Structure Safety of MOE,Tianjin University,Tianjin 300072,China;College of Civil Engineering,Hebei University of Engineering,Handan 056038,China)
出处
《空间结构》
CSCD
北大核心
2022年第3期16-26,共11页
Spatial Structures
基金
国家自然科学基金项目(51608360,51978458,51525803)。
关键词
铝合金单层球面网壳
装配式空心毂节点
风压分布
风振响应
CFD数值模拟
双向流固耦合
single-layer aluminum latticed domes
assembled hub joint
wind pressure distribution
wind-induced response
CFD numerical simulation
two-way fluid-structure coupling
