建筑结构风致响应的时频域计算方法比较

doi:10.3785/j.issn.1008-973X.2013.09.009

2013, Vol. 47

Issue (9): 1573-1578 DOI: 10.3785/j.issn.1008-973X.2013.09.009

土木工程、工程力学

建筑结构风致响应的时频域计算方法比较

沈国辉1, 王宁博2, 任涛3, 施祖元3, 楼文娟1

1.浙江大学结构工程研究所, 浙江杭州 310058|2.中国建筑西北设计研究院,陕西西安 710003;
3.浙江省建筑设计研究院,浙江杭州 310006

Comparison of time domain and frequency domain methods to
obtain wind-induced responses of civil engineering structures

SHEN Guo-hui1, WANG Ning-bo2, REN Tao3, SHI Zhu-yuan3, LOU Wen-juan1

1.Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China；
2.China Northwest Building Design Research Institute, Xi’an 710003, China；
3.Zhejiang Institute of Architectural Design, Hangzhou 310006, China

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摘要：

针对结构风致响应的时域法结果和频域法结果是否一致的问题,以高层建筑和冷却塔为例比较两种方法在相同的风荷载条件时的响应结果,分析时域法和频域法产生结果差异的原因并给出减少差异的措施,为两种方法在求解结构风致响应的合理应用提供参考.研究表明：频域分析中根据各阶模态的应变能确定该阶模态的贡献程度；计算模型是影响时频域结果吻和程度的一个重要因素,如果两种方法采用相同的计算模型,那么两种方法得到的计算结果会非常接近；计算中结构阻尼的处理方式也是导致时频域计算结果差异的一个原因.

Abstract:

The problem whether the wind-induced responses of civil engineering structures obtained using the time domain method are equal to the responses obtained using the frequency domain method was investigated. Taking a high-rising building and a cooling tower as examples, the responses obtained using these two methods were compared, which were calculated under the same wind loading conditions. The reasons for the discrepancy between the two results were analyzed and the countermeasures to reduce the discrepancy were suggested. This study can be a good reference for the rational application of these two methods in solving the wind-induced responses of structures. Results show that the contribution of a certain vibration mode can be quantified by the strain energy of the mode in the frequency domain analysis. The calculating model is one of dominating factors leading to the discrepancy of the results obtained using the time and frequency domain methods. If the same calculating model is used, the results obtained using these two methods will be close. The treatment of structural damping during the calculating process is also a reason leading to the discrepancy of the results．

出版日期: 2013-09-01

TU 312.1

基金资助:

国家自然科学基金资助项目（51178425）.

作者简介: 沈国辉（1977-），男，副教授，主要从事结构风工程和结构计算分析. E-mail: ghshen@zju.edu.cn

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引用本文:

沈国辉, 王宁博, 任涛, 施祖元, 楼文娟. 建筑结构风致响应的时频域计算方法比较[J]. J4, 2013, 47(9): 1573-1578.

SHEN Guo-hui, WANG Ning-bo, REN Tao, SHI Zhu-yuan, LOU Wen-juan. Comparison of time domain and frequency domain methods to
obtain wind-induced responses of civil engineering structures. J4, 2013, 47(9): 1573-1578.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.09.009 或 http://www.zjujournals.com/eng/CN/Y2013/V47/I9/1573

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