建筑结构学报2017，Vol.38Issue(10)：102-107,6.DOI:10.14006/j.jzjgxb.2017.10.012
高层建筑顺风向荷载气动导纳研究
Aerodynamic admittance of along-wind loads on tall buildings
摘要
Abstract
Along-wind fluctuating loads on tall buildings are usually obtained by power spectra and coherence functions of inflow wind velocity based on the quasi steady theory.In this process,the aerodynamic admittance of along-wind loads plays an important role.Ten tall building models with different section shapes were tested using simultaneous pressure measuring technique in a wind tunnel.According to the test data,the power spectra and aerodynamic admittances of along-wind loads on every layer in the terrain category B and D were analyzed in detail and the fitting formula of the aerodynamic admittances was proposed.Parameters in this formula were given accordingly.The windinduced responses of an actual high-rise building were calculated by the formula given here and random vibration method based on wind tunnel test data respectively.The results show that the aerodynamic admittances of along-wind loads on different height of the same tall building have little discrepancy and vary with the section shapes.All of the aerodynamic admittances satisfy the exponential law and approach 1.0 when the reduced frequency is less than 0.1.The response using present aerodynamic admittance agrees well with one from the wind tunnel experiment and the error is less than 10％.关键词
高层建筑/顺风向/气动导纳/风致响应Key words
tall building/along-wind/aerodynamic admittance/wind induced response分类
建筑与水利引用本文复制引用
张建国,顾明..高层建筑顺风向荷载气动导纳研究[J].建筑结构学报,2017,38(10):102-107,6.基金项目
国家自然科学基金重大研究计划重点项目(90715040,91215302). （90715040,91215302）
