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張相庭?。ㄍ瑵?jì)大學(xué) 上?！?00092）
[提要] 基于結(jié)構(gòu)隨機(jī)振動(dòng)理論，可導(dǎo)出順風(fēng)向風(fēng)振時(shí)各類風(fēng)響應(yīng)。對(duì)于響應(yīng)以第1振型為主的高聳結(jié)構(gòu)等結(jié)構(gòu)，常以先求風(fēng)振系數(shù)再求各類風(fēng)響應(yīng)較為方便。風(fēng)振系數(shù)國(guó)內(nèi)外有不同的表達(dá)式。結(jié)合我國(guó)荷載規(guī)范風(fēng)振系數(shù)表達(dá)式，可推出與Davenport風(fēng)振系數(shù)完全相同的表達(dá)式，以及任何其他表達(dá)式。對(duì)在應(yīng)用結(jié)構(gòu)隨機(jī)振動(dòng)理論推導(dǎo)時(shí)常見的錯(cuò)誤加以分析。展望了21世紀(jì)風(fēng)振研究的發(fā)展和變化。
[關(guān)鍵詞] 隨機(jī)振動(dòng)理論 風(fēng)振 風(fēng)振系數(shù) 計(jì)算機(jī)Based on random vibration theory, the along-wind structural response formulae are derived. It is convenient to express the wind-excited vibration of structures in term of gust response factor for tower structures and other tall structures taking only into consideration of first vibration mode.The expression formula of gust response factor may be different at home and abroad.The expression formula of gust response factor in China code may be exchanged into other expression formula of gust response factor such as that derived by A.G.Davenport or used by USA code.The common errors in using random vibration theory to wind engineering are pointed out.The development and change of code on wind in the 21th century due to rapid growth of computer technique are looked forward.
Keywords: random vibration theory; wind-excited vibration; gust response factor; computer
參 考 文 獻(xiàn)
1．建筑結(jié)構(gòu)荷載規(guī)范( GB50009-2001)．中國(guó)建筑工業(yè)出版社，2002.
2．Simiu E, Scanlan R H. Wind effects on structures. 1985.
3．M．Ф．Барштейн. Воздейстаие ветра на высокие coopyжeнн-ия. Строительная механика и расчет сооружений, 1959,(1).
4．王光遠(yuǎn)．建筑結(jié)構(gòu)的振動(dòng)．科學(xué)出版社，1978．
5．王光遠(yuǎn)，李桂青．在風(fēng)荷載作用下高聳結(jié)構(gòu)反應(yīng)的概率分析．建筑學(xué)報(bào)，1962，(3)．
6．張相庭工程結(jié)構(gòu)風(fēng)荷載理論和抗風(fēng)計(jì)算手冊(cè)．同濟(jì)大學(xué)出版社，1990．
7．Davenport A G. Gust loading factors. ASCE, ST3,1967
8．ASCE Standard 7-95. Minimum design loads for buildings and other structures. Developmental Computer-Based Version, 1995.
9．張相庭．風(fēng)工程力學(xué)研究最新進(jìn)展和二十一世紀(jì)展望見：力學(xué)與工程——21世紀(jì)工程技術(shù)的發(fā)展對(duì)力學(xué)的挑戰(zhàn)，上海交通大學(xué)出版社，1999．
10．張相庭等．結(jié)構(gòu)振動(dòng)力學(xué)．同濟(jì)大學(xué)出版社，1994．
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