摘要
为考察某259m超高层建筑表面风压、风致响应及测点布置对风效应的影响,对该高层进行了刚性模型测压试验。根据随机振动理论算得了该高层的风致响应。结果表明,该建筑最高居住层风致加速度响应在一定程度上超出了规范阈值,而结构顶部最大风致位移响应在规范允许范围内。通过对不同行列测点风压数据分析发现,除受周边干扰的部分区域外,同一列自上而下不同行测点风压数据呈平稳变化趋势,而同一行不同列测点风压数据则差别显著;分析不同测点层(列)取舍方式对动力响应的影响可知,适当减少测点层数对动力响应结果影响甚微,而减少测点列数则使动力响应出现较大变化,说明在风洞试验模型测点布置时,可适当增加测点行间距,并尽量控制测点列间距,以此来解决测点总数限制的问题。
In order to investigate the influences of the surface pressure,wind-induced response and pressure tap distri- bution on wind effect, rigidity model manometric test of a tall building with 259 meters high was carried out. The wind-in- duced response results, which were derived by random vibration theory, show that the wind-induced acceleration exceeds the standard threshold to a certain extent, while the wind-induced displacement is within allowable range. It is found that, through the analysis of wind pressure results with different pressure tap distributions, there is only sight discrepancy be- tween pressure results of adjacent layers,while a observable disparity between adjoining columns. What＇s more, if one or more pressure tap rows are pruned away from the calculation data and replaced by its adjacent rows, the wind-induced re- sponse only changes slightly, but the total column number of pressure tap significantly influence the response. So it can be concluded that too many tap rows are not necessary, especially when the pressure tap amount is limited by the test equip- ment, but pressure tap would be intensive enough in each tap row.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2014年第2期100-105,110,共7页
Journal of Wuhan University of Technology
基金
国家自然科学基金(90715023
51178359)
关键词
超高层建筑
风致响应
表面风压
测点布置
tall buildings
wind effects
surface wind pressure
pressure tap distribution
