摘要
本文研究了结构参数未知条件下的高层建筑风荷载反演问题。通过将平均风速的实测特性作为识别计算中的辅助条件,文中提出了一类荷载归一化统计平均方法。结合工程实例,进行了高层建筑风荷载反演分析。结果表明,本文建议方法可以在幅值、时程等方面均给出良好的风荷载反演结果,同时识别得到的结构参数具有良好的精度。从而为高层建筑风荷载研究提供了一条可行途径。
A new time domain identification method is proposed in this paper for in versing wind input process when structural parameters are unknown. Based on the analysis of the experimental characteristic of the average wind speed and by taking this characteristic as an additional condition, a general statistical average algorithm is suggested which can be used for inversing wind load process acting on the structure and estimating structural parameters simultaneously. The method has also been evaluated and validated through the numerical analysis of an existing twelve-storey structure. The inverse wind process is compared with the real process by means of amplitude and time history. The results indicate that the time history of the wind load can be rationally inversed from the structural vibration measurements and the structural parameter can be successfully estimated as well.
出处
《力学季刊》
CSCD
北大核心
2001年第1期72-77,共6页
Chinese Quarterly of Mechanics
基金
国家杰出青年科学基金(59825105)
