开口间距对道路声屏障脉动风致响应影响分析  

Influence Analysis of Opening Spacing on Fluctuating Wind-induced Responses of Road Noise Barriers

作　　者：谭金华[1] 杨芷珉 姜友维 TAN Jinhua;YANG Zhimin;JIANG Youwei(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学交通与物流工程学院,武汉430063

出　　处：《武汉理工大学学报（交通科学与工程版）》2024年第5期947-952,共6页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：文中基于Davenport谱并采用Shinozuka谐波合成法模拟风速30 m/s的自然随机脉动风场,获得结构表面脉动风荷载.建立8种顶部开口间距的声屏障有限元模型,研究其模态、位移和应力风振响应.结果表明:①相同阶数的声屏障结构自振频率随着开口间距L的增大呈现下降趋势;②声屏障竖向位移峰值和最大应力峰值均随顶部开口距离L增大而增大,分别出现在声屏障出入口6.0 m处和侧立柱顶部主梁连接位置;③当开口间距L超过8.0 m时,声屏障风致位移和应力响应迅速增大,建议控制封闭式声屏障顶部开口距离在总跨度的1/6内.Based on Davenport spectrum and Shinozuka harmonic synthesis method,the natural random fluctuating wind field with wind speed of 30m/s was simulated,and the fluctuating wind load on the structure surface was obtained.Eight kinds of finite element models of sound barrier with top opening spacing were established,and their modal,displacement and stress wind-induced vibration responses were studied.The results show that:①the natural frequency of the sound barrier structure with the same order decreases with the increase of the opening spacing L.②The peak value of vertical displacement and maximum stress of the sound barrier increase with the increase of the top opening distance L,which appear at the entrance and exit of the sound barrier 6.0m and the connection position of the main beam at the top of the side column respectively.③When the opening distance l exceeds 8.0 m,the wind-induced displacement and stress response of the sound barrier increase rapidly,so it is suggested to control the opening distance at the top of the closed sound barrier within 1/6 of the total span.

关 键 词：封闭式声屏障 开口间距 自然脉动风 风振响应 数值模拟 

分 类 号：TU391[建筑科学—结构工程]