非传统形体超高层建筑气动作用机制及气弹性能研究

Based on research achievements and the latest developments, the studies on aerodynamic mechanism and aero-elastic behaviors of super-tall buildings with various unconventional configurations are proposed, aiming to extend the series researches on the wind-resistant performance of super-tall buildings with various unconventional configurations directed by Prof. Yukio Tamura..Hybrid monitoring wind tunnel test, using Particle Image Velocimetry (PIV) system and Electronic Scanning Pressure (ESP) system, will be carried out to get wind flow around the building and wind pressure acting on the building simultaneously. The intrinsic structures and correlation of wind pressure and wind flows will be identified, employing random filed decomposition method. Aerodynamic mechanism of typical super-tall buildings with varying square plan with height will be revealed..Wind-induced responses of super-tall buildings with various unconventional configurations will be simulated using aero-elastic wind tunnel tests, and VIV-Galloping vibration and couple vibrations between two sway directions, will be investigated, according to the latest characteristics of super-tall buildings. Critical condition of aero-elastic instability of super-tall buildings and effects of various unconventional configurations will be given. Using Equivalent Nonlinear Equation (ENLE), semi empirical and semi analytical identification method of self-excited force will be provided, and characteristics of self-excited force of super-tall buildings with various unconventional configurations will be given based on aero-elastic wind tunnel tests. .The wind-resistant performance of super-tall buildings with various unconventional configurations will be assessed, considering aerodynamic wind load, self-excited force, wind-induced responses and pedestrian wind environment, aiming to provide reference for engineering practices.

结合已有研究成果和最新发展趋势，提出对非传统形体超高层建筑气动作用机制及气弹性能展开研究，旨在进一步完善、扩展Yukio Tamura教授开创的非传统形体超高层建筑抗风性能系列研究。.利用PIV系统和电子扫描阀系统，进行多物理场同步量测风洞试验，获得超高层建筑周边绕流场和表面风压场；采用随机场分解方法，识别绕流场、风压场内在本征结构及相关性，确定截面沿高度变化的典型非传统形体超高层建筑气动作用机制。通过底部弹性支撑刚性模型气弹风洞试验，对不同形体超高层建筑风致效应进行全过程模拟，结合最新发展趋势，在更宽的参数范围研究涡激共振与驰振的耦合效应、两平动方向风致振动的耦合效应，确定气弹失稳发生条件；根据等效非线性方程，采用半经验半解析的方法识别不同形体超高层建筑气弹自激力。综合系列研究得到的气动风荷载、气弹自激力、风致效应及行人风环境特性，对非传统形体超高层建筑抗风性能进行综合评述，指导工程实践

本项目结合已有研究成果和最新发展趋势，对非传统形体超高层建筑气动作用机制及气弹性能展开研究，旨在进一步完善、扩展Yukio Tamura教授开创的非传统形体超高层建筑抗风性能系列研究。.利用风洞试验，获得超高层建筑周边绕流场和表面风压场；采用随机场分解方法，识别绕流场、风压场内在本征结构及相关性，确定截面沿高度变化的典型非传统形体超高层建筑气动作用机制。通过底部弹性支撑刚性模型气弹风洞试验，对不同形体超高层建筑风致效应进行全过程模拟，结合最新发展趋势，在更宽的参数范围研究涡激共振与驰振的耦合效应、两平动方向风致振动的耦合效应，确定气弹失稳发生条件；根据等效非线性方程，采用半经验半解析的方法识别不同形体超高层建筑气弹自激力。综合系列研究得到的气动风荷载、气弹自激力、风致效应及行人风环境特性，对非传统形体超高层建筑抗风性能进行综合评述，指导工程实践。