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(1 深圳市建筑設計研究總院有限公司，深圳518031；2教育部建筑安全與節(jié)能重點實驗室, 湖南大學土木工程學院，長沙 410082；3 香港城市大學土木及建筑工程系，香港)

[摘要] 根據風洞試驗的結果，確定了高層建筑結構的風荷載時程，對結構進行分析得到了結構在風荷載作用下的響應時程。假定結構物理參數未知情況下建立了反問題模型，根據時程分析結果，運用荷載歸一化統(tǒng)計平均方法識別出結構的物理參數并反演出結構的風荷載。在計算過程中假定結構相鄰層的風荷載是完全相關的，利用這一假定不斷對風荷載反演結果進行修正，并在迭代過程中引入最小二乘迭代格式來估計結構的物理參數，反演出的結構風荷載與實際值吻合很好。

[關鍵詞] 高層建筑;風洞試驗;時程分析;參數識別;反演

中圖分類號： TU312       文獻標識碼：A      文章編號：1002-848X(2013)S1-0954-06

Inverse analysis of wind loads on tall-buildings

Yang Wanghua^1,2, Li Qiusheng^2,3, Wang Qiwen¹, Zhou bin¹

（1Shenzhen General Institute of Architectuctural Design and Research Co. , Ltd, Shenzhen 518031, China; 2 Key Laboratory of Building Safety and Energy Efficiency of Hunan University, Changsha 410082, China; 3 City University of Hong Kong, Hong Kong, China)

Abstract: The results of wind tunnel test are used to determine the time-history of the wind loads on a tall building. Then, on the basis of structural dynamics equation, the time domain analysis of the structure under the wind loading action is carried out and the time-history of the structural responses are calculated. Using the structural responses, the normalized statistical average algorithm is adopted to inversely determine the wind loads on the structure with unknown physical parameters. The wind loads on adjacent floors are assumed to be completely correlated. This assumption is utilized to modify the inversely determined results in iterative process, and the least square method is used to identify the parameters of the structure and the wind loads. The applicability of the proposed method for dealing with noise involved in the response data is assessed.

Keywords: tall building; wind tunnel test; time-history analysis; parametric identification; inverse problem