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（1 浙江大學(xué)建筑設(shè)計(jì)研究院， 杭州 310028; 2 浙江大學(xué)結(jié)構(gòu)工程研究所， 杭州 310058）

 

［摘要］以杭州新火車東站為例進(jìn)行風(fēng)洞試驗(yàn)，研究大跨度屋蓋結(jié)構(gòu)表面風(fēng)壓的非高斯分布特性及峰值因子計(jì)算方法。分別通過基于零穿越率的峰值因子法、改進(jìn)峰值因子法、Sadek-Simiu法和基于經(jīng)典極值理論的改進(jìn)Gumbel法對(duì)各風(fēng)向角下風(fēng)壓數(shù)據(jù)的峰值因子進(jìn)行了估計(jì)，并在改進(jìn)峰值因子法的基礎(chǔ)上提出了偏度非高斯峰值因子法。對(duì)各種方法的適用性及計(jì)算結(jié)果進(jìn)行對(duì)比分析表明，改進(jìn)峰值因子法并不適用于峰度小于3的過程。提出的偏度非高斯峰值因子法與Sadek-Simiu法相比，計(jì)算結(jié)果十分吻合，而且對(duì)高斯過程同樣適用，無需對(duì)屋蓋測(cè)點(diǎn)進(jìn)行高斯與非高斯分區(qū)。在應(yīng)用時(shí)由于無需編程、計(jì)算量小、適用性好，更方便工程設(shè)計(jì)使用。

［關(guān)鍵詞］大跨屋蓋； 非高斯特性； 偏度； 峰度； 峰值因子； 偏度非高斯峰值因子法

中圖分類號(hào)：TU312+.1      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2013)15-0083-05

 

Lin Wei1, Huang Mingfeng2, Lou Wenjuan2

 (1 Architectural Design and Research Institute of Zhejiang University, Hangzhou 310028, China; 2 Institute of Structure Engineering, Zhejiang University, Hangzhou 310058, China)

 

Abstract: The non-Gaussian characteristics and peak factor methods of wind pressures on a long-span roof were systematically analyzed by taking wind tunnel test of Hangzhou New Train Station for example. The traditional peak factor method based on a zero-crossing rate, the improved peak factor method, the Sadek-Simiu method and the improved Gumbel method were employed to estimate the peak factors of wind-induced pressures. Then a new skewness-parameter non-Gaussian peak factor method was developed based on the improved peak factor method. The applicability of various methods was discussed and compared to each other. Results show that the improved peak factor method is not applicable for some pressure processes with kurtosis smaller than three. Results of the proposed method agree well with that of the Sadek-Simiu method. Moreover, the proposed method is also applicable for Gaussian processes, without the Gaussian and non-Gaussian partition for the taps on the long-span roof. For no programming, small calculation and well application, it is more convenient for engineering design.

Keywords: Long-span roof; characteristics; non-Gaussian method; skewness; kurtosis; peak factor; parameter

*國家自然科學(xué)基金項(xiàng)目（51008275，50578144）。

作者簡(jiǎn)介：林巍，碩士，助理工程師，Email: lwinners@163.com。

 

［1］沈國輝,孫炳楠,樓文娟.大跨屋蓋懸挑結(jié)構(gòu)的風(fēng)荷載分析［J］.空氣動(dòng)力學(xué)報(bào)，2004, 22(1):41-46.

［2］SAATHOF P J, MELBOURNE W H.The generation of peak pressures in separate/reattaching flows［J］.Wind Eng.Ind. Aerodyn,1989(32):121-134.

［3］孫瑛,武岳,林志興, 等.大跨度屋蓋結(jié)構(gòu)風(fēng)壓脈動(dòng)的非高斯特性［J］.土木工程學(xué)報(bào)，2007,40(4):1-5.

［4］KUMAR K S,STATHOPOULOS T.Synthesis of non-Gaussian wind pressure time series on low building roofs ［J］.Journal of Structural Engineering,1999,21:1086-1100.

［5］葉繼紅, 侯信真. 大跨屋蓋脈動(dòng)風(fēng)壓的非高斯特性研究［J］.振動(dòng)與沖擊，2010, 29(7):9-15.

［6］DAVENPORT A G.Note on the distribution of the largest value of a random function with application to gust loading ［J］. Proceedings of the Institution of Civil Engineers, 1964, 28(2):187-196.

［7］KAREEM A, ZHAO J. Analysis of non-Gaussian surge response of tension leg platforms under wind loads ［J］. Journal of Off-shore Mechanics and Arctic Engineering, ASME, 1994, 146:137-144.

［8］SADEK F, SIMIU E. Peak non-Gaussian wind effects for database-assisted low-rise building design［J］.Journal of Engineering Mechanics,ASCE,2002,128(5):530-539.

［9］GRIGORIU M. Applied non-Gaussian Processes ［M］. Englewood Cliffs, NJ: Prentice Hall, 1995: 35-58.

［10］全涌, 顧明, 陳斌,等. 非高斯風(fēng)壓的極值計(jì)算方法［J］. 力學(xué)學(xué)報(bào), 2010, 42(3):560-566.

［11］埃米爾-?？?羅伯特·H·斯坎倫. 風(fēng)對(duì)結(jié)構(gòu)的作用——風(fēng)工程導(dǎo)論［M］.劉尚培,項(xiàng)海帆,謝霽明，譯.上海：同濟(jì)大學(xué)出版社, 1992: 191-215.

［12］邱天爽,張旭秀,李小兵,等.統(tǒng)計(jì)信號(hào)處理-非高斯信號(hào)處理及其應(yīng)用［M］.北京:電子工業(yè)出版社,2004: 114-119.

［13］WINTERSTEIN S R. Nonlinear vibration models for extremes and fatigue ［J］. Journal of Engineering Mechanics, ASCE, 1988, 114(10):1772-1790.

［14］GRIGORIU M. Crossing of non-Gaussian translation process［J］. Journal of Engineering Mechanics, ASCE, 1984,110(4): 610-20.

［15］HUANG M F, CHAN C M, KWOK K, et al. A peak factor for predicting non-Gaussian peak resultant response of wind-excited tall buildings ［C］//The 7th Asia-Pacific Conference on Wind Engineering. Taipei:［s.n.］.2009.