摘要
研究了5种不同宽度和5种不同高度比的两个正方形截面柱体间在不同地貌类型下的静力和动力干扰效应。结果显示,不同宽度比的施扰物体的动态干扰效应存在较大的差异,且宽度比受扰物体小的施扰物体在较低折算风速下会诱发涡激共振问题而产生较为严重的动力干扰效应,这个结果也澄清了已有文献的一些错误的结论。回归分析发现不同配置间干扰因子所存在的相关性并得到可以描述不同因素对干扰效应影响的定量关系,这些结果在很大程度上简化了干扰效应研究结果描述的繁杂性,同时使结构在受扰后的风荷载取值更趋于简洁和合理。文中根据对于试验数据的归纳分析结果,提出了一些可供规范修改时参考的建议。
The static and dynamic interference effects on a high-rise prismatic structure due to the excitation of several types of upwind structures with various breadths and heights in different upwind terrains are studied. The results show that the interfering structure of smaller breadth can lead to a vortex-induced resonance at the lower reduced velocity and cause pronounced effects on the interfered structure, and this clarifies the wrong conclusions existing in the literature. The results also show significant correlations between the distributions of the interference factors of different configurations and upwind terrains, therefore, relevant regression equations are proposed to simplify the description of the multi-parameter wind induced interference effects on two high-rise structures. Suggestions are provided for design code modifications to assess the interference effects between two high-rise prismatic structures.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第10期32-38,共7页
China Civil Engineering Journal
基金
国家自然科学基金项目(50478118
50321003)
广东省自然科学基金项目(010455)
关键词
高层建筑
风荷载
干扰效应
风洞试验
相关分析
tall building
wind load
interference effects
wind tunnel test
correlation analysis
