矩形高层建筑垂直迎风时风场及风振响应实测.pdfVIP

第36 卷 第5 期 噪 声 与 振 动 控 制 Vol 36 No.5 2016 年10月 NOISE AND VIBRATION CONTROL Oct. 2016 文章编号：1006-1355(2016)05-0122-06 矩形高层建筑垂直迎风时风场及风振响应实测 朱艳英，孟令常，玉 姣 （辽宁石油化工大学 理学院，辽宁 抚顺 113001 ） 摘 要：在接近垂直迎风情况下对抚顺市内某小区的一矩形高层居民楼采用三维超声风速仪和低频麦克风对楼顶 风场和楼房迎风面风压进行实际测量，同时采用加速度传感器对麦克风所在高度处建筑的振动情况进行同步监测。 对顺风向脉动风速和脉动风压分析结果表明，建筑顺风向的脉动风速和脉动风压都不符合正态分布，两者偏离趋势、 偏离程度并不一致，建筑顶部的顺风向风速谱与von Karman 谱符合较好，并且对于高度为80 m 左右的矩形建筑，风速 不大时，在建筑物迎风面相对高度约0.8 处的滞流区，迎风面的脉动风压与脉动风速仍旧符合准定常假设。通过对春 季和秋季测得的两次数据进行对比分析发现，尽管两次测量时天气情况及风力级别接近，但秋季风的脉动强度要远大 于春季风。楼房两个主轴方向的加速度响应显示楼房发生了扭转现象。 关键词：振动与波；脉动风速；脉动风压；功率谱；风致加速度响应；矩形高层建筑 中图分类号：O329 ；TU311. 3 ；X839 文献标识码：A DOI 编码：10.3969/j.issn. 1006-1335.2016.05.026 Field Measurement of Normal Incident Wind and Wind-induced Response of a Rectangular High-rise Building ZHU Yan-ying , MENG Ling-chang , YU Jiao ( College of Science, Liaoning Shihua University, Fushun 113001, Liaoning China ) Abstract : This paper presents some selected results obtained from the field measurements of wind effects with the oncoming flow perpendicular to the facade of a rectangular high-rise residential building located in Fushun. Synchronous data of roof- top wind velocities, windward pressures, and acceleration responses are recorded by a three- dimensional ultrasonic anemometer, a low frequency microphone, and two accelerometers respectively. The measured data is analyzed to obtain the information of wind characteristics and wind-induced response of the structure. Statistical analysis of longitudinal fluctuating wind velocities and windward fluctuating pressures shows that they dont obey the