高层建筑风荷载反演研究
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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.
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.
引文
[1] 张相庭.结构风压与风振计算.上海:同济大学出版社,1985
[2] 赖明等.四川南部山地风效应.重庆:重庆建筑工程学院研究报告,1993
[3] Shiotani M, Avai H. Intemational conference on the wind effect on building and structures, 1967, 47-53
[4] 李桂青等.结构动力可靠性理论及其应用.北京:地震出版社,1993
[5] 李杰.随机结构系统分析与建模.北京:科学出版社,1996
[6] 李杰,陈隽.结构参数未知条件下的地震动反演研究.地震工程工程振动,1997,17(3) :27-35
[7] 李杰,陈隽.输入未知条件下的结构物理参数识别研究.计算力学学报,1999,16(1) :32-40
[8] 星谷胜.随机振动分析.北京:地震出版社,1977
[2] 赖明等.四川南部山地风效应.重庆:重庆建筑工程学院研究报告,1993
[3] Shiotani M, Avai H. Intemational conference on the wind effect on building and structures, 1967, 47-53
[4] 李桂青等.结构动力可靠性理论及其应用.北京:地震出版社,1993
[5] 李杰.随机结构系统分析与建模.北京:科学出版社,1996
[6] 李杰,陈隽.结构参数未知条件下的地震动反演研究.地震工程工程振动,1997,17(3) :27-35
[7] 李杰,陈隽.输入未知条件下的结构物理参数识别研究.计算力学学报,1999,16(1) :32-40
[8] 星谷胜.随机振动分析.北京:地震出版社,1977
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