本文選題：超高層建筑 + 原型實測��； 參考：《建筑結構學報》2016年06期

【摘要】：采用自主研發(fā)的LAC-I無線加速度傳感器,對高度441.8 m的深圳京基100(KK100)的加速度響應進行了為期5年的連續(xù)監(jiān)測。選取了2011年至2015年間的4次主要臺風(納沙、杜蘇芮、維森特和天兔)經過時的加速度觀測數據以及常態(tài)弱風和環(huán)境激勵下的加速度數據,進行結構動力參數識別以及驗證與風洞試驗結果的一致性。結果表明:各工況下自振頻率的識別結果具有很好的一致性,與其在設計階段對結構進行有限元分析得到的相應結果約大21%;阻尼比的識別結果表現出一定的離散性,x、y兩個方向的阻尼比分別在0.6%~0.9%和0.33%~0.71%之間變化,但阻尼比與振幅并不存在明顯的相關性;在風場條件基本一致的情況下,實測結果與風洞試驗結果具有良好的一致性;在振幅較大的橫風向,實測和風洞試驗得到的結構頂部峰值加速度響應相差4.2%,說明了風洞試驗的可靠性。同時近5年來的連續(xù)觀測遇到了與深圳地區(qū)10年重現期風壓相當的最大風速,測得的瞬時峰值加速度僅為0.123 m/s2,表明該建筑的舒適度能夠滿足要求。
[Abstract]:The acceleration response of Shenzhen Jingji 100KK100 at a height of 441.8 m was monitored continuously for 5 years using LAC-I wireless accelerometer.The acceleration data of four major typhoons (Nasha, DuSuri, Vicente and Bunny) passing between 2011 and 2015, as well as acceleration data under normal weak winds and ambient excitation were selected.The dynamic parameters of the structure are identified and verified in accordance with the results of the wind tunnel test.The results show that the identification results of natural frequencies are consistent with each other.The results obtained from finite element analysis of the structure in the design stage are about 21 and the damping ratio identification results show that the damping ratio of the two directions varies between 0.690% and 0.330.71%, respectively.However, there is no obvious correlation between damping ratio and amplitude, when the wind field conditions are basically consistent, the measured results are in good agreement with the wind tunnel test results.The difference of peak acceleration response between the measured and the wind tunnel test shows the reliability of the wind tunnel test.At the same time, the continuous observation in the past five years has encountered the maximum wind speed equivalent to the wind pressure in the 10-year recurrence period in Shenzhen, and the measured instantaneous peak acceleration is only 0.123 m / s ~ (2), which indicates that the comfort of the building can meet the requirements.
【作者單位】： 華南理工大學亞熱帶建筑科學國家重點實驗室;廣州大學廣東省工程結構抗風與健康監(jiān)測工程技術研究開發(fā)中心;深圳市力鵬建筑結構設計事務所;同濟大學土木工程防災國家重點實驗室;
【基金】：國家自然科學基金項目(51278204,51478130)
【分類號】：TU973.213

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本文編號：1752035