摘要
受扰状态下高层建筑的静动力响应明显不同于单体建筑。以一实际姊妹塔楼为研究对象,根据风洞试验中获得的风压分布结果,计算塔楼结构的风致响应。风洞试验及结构响应计算不仅考虑了两栋塔楼同时存在的情况,还考虑一栋塔楼先期建成,另一塔楼尚未建造的情况。细致分析了不同风向下结构的平均及脉动位移响应、静动力干扰因子的特点。结果表明,施扰建筑位于受扰建筑正前方时具有最大的干扰效应,此时受扰塔楼的总位移峰值最小;而当受扰建筑处于施扰建筑下游时,在风向偏斜时,受扰塔楼的总位移峰值最大。
Due to the interference of neighboring buildings, the static and dynamic wind-induced responses of tall buildings are considerably different from those of isolated buildings. The dynamic interference effects between two tall buildings are studied. The case in which only one building exists without the other is also analyzed. The wind-induced dynamic responses of the buildings are computed in frequency domain by using mode superposition method, based on the wind pressure distributions on the buildings from wind tunnel tests on the rigid models. The characteristics of the wind-induced displacement responses and static/dynamic interference factors for different wind directions are investigated. The study indicates that the upstream tower located just in the front of the interfered building has the greatest influence upon the downstream tower, whose total peak displacements are the smallest. When the principal building is located upstream with an oblique wind direction, the strongest interference effect is reached, with the largest total peak displacement of the upstream building.
出处
《土木工程学报》
EI
CSCD
北大核心
2007年第8期16-21,共6页
China Civil Engineering Journal
基金
国家自然科学基金创新研究群体科学基金(50621062)
同济大学青年优秀人才培养行动计划
关键词
高层建筑
干扰效应
模态叠加法
结构风致振动
tall building
interference effect
mode superposition method
wind-induced vibration
