任意排列三个高层建筑间顺风向动力干扰效应的试验研究  

EXPERIMENTAL STUDY OF ALONG-WIND DYNAMIC INTERFERENCE EFFECTS AMONG THREE ARBITRARILY ARRANGED TALL BUILDINGS

作　　者：谢壮宁[1] 顾明[2] 倪振华[1] 

机构地区：[1]汕头大学土木工程系,汕头515063 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《工程力学》2005年第5期136-141,共6页Engineering Mechanics

基　　金：国家自然科学基金重大项目(59895410);国家自然科学基金项目(50478118);教育部博士点基金和广东省自然科学基金(010455)联合资助

摘　　要：分析了5种不同高度比的两个任意排列的施扰建筑物对受扰建筑的顺风向动力干扰影响,结果显示两个施扰建筑的协同作用会产生远高于单个施扰建筑的干扰效应。采用人工神经网络、统计方法对不同参数配置的包络干扰因子(EIF)分布进行分析,发现不同高度比配置以及不同地貌类型下的EIF分布存在较为明显的相关特征,并由此得到了可以反映不同参数对EIF分布影响的定量关系,它大大地简化了考虑多参数变化干扰效应研究结果的繁杂程度,使结构受扰后的荷载估计计算更趋于简洁合理。根据对于试验数据的归纳分析结果,初步提出了一些可供规范修改时参考的建议。Wind-induced along-wind dynamic interference effects of tall buildings are studied by a series of wind tunnel tests. Interference excitations of upwind buildings with various heights in different upwind terrains are considered. Interference characteristics are investigated by artificial neural network （ANN） method and correlation analysis. The results show that two upstream buildings cause more adverse dynamic effects on the downstream building than a single upstream building does. Significant correlations are found in the distributions of the envelope interference factors of different configurations and upwind terrains, a series of relevant regression equations are therefore proposed to simplify the complexity of the multi-parameter wind-induced interference effects among three tall buildings. Recommendations about the along-wind dynamic interference effects on three tall buildings are also given as the reference for improving the design code of wind loads.

关 键 词：高层建筑:风荷载 风洞试验 顺风向响应 干扰因子 相关分析 

分 类 号：V211.74[航空宇航科学与技术—航空宇航推进理论与工程]