發(fā)布時間：2018-10-23 17:49

【摘要】：高層建筑橫風(fēng)向風(fēng)荷載特性與風(fēng)振效應(yīng)復(fù)雜，往往成為高層建筑的控制荷載，，本文利用規(guī)范風(fēng)荷載計(jì)算方法和風(fēng)洞試驗(yàn)手段對高層建筑橫風(fēng)向風(fēng)荷載特性與風(fēng)振效應(yīng)進(jìn)行研究。分析了相關(guān)參數(shù)對高層建筑橫風(fēng)向風(fēng)荷載的影響，探討中日澳風(fēng)荷載規(guī)范計(jì)算方法的差異，對單體和群體高層建筑橫風(fēng)向風(fēng)效應(yīng)進(jìn)行風(fēng)洞試驗(yàn)研究，將虛擬激勵法引用到橫風(fēng)向風(fēng)振響應(yīng)分析中，主要工作有以下幾點(diǎn)： (1)系統(tǒng)分析相關(guān)參數(shù)對高層建筑橫風(fēng)向風(fēng)荷載的影響規(guī)律，探究中日澳規(guī)范風(fēng)荷載計(jì)算方法的差異�；凇督ㄖY(jié)構(gòu)荷載規(guī)范》(GB50009-2012)風(fēng)荷載計(jì)算方法，研究地貌類別、高寬比、寬厚比、周期、阻尼比、風(fēng)壓對矩形高層建筑橫風(fēng)向風(fēng)荷載的影響，比較方形和圓形高層建筑、矩形高層建筑帶削角與凹角橫風(fēng)向與順風(fēng)向風(fēng)荷載比值大小。采用中、日、澳三國規(guī)范風(fēng)荷載計(jì)算方法，對不同高度高層建筑橫風(fēng)向風(fēng)荷載進(jìn)行分析，利用中日規(guī)范對一建筑風(fēng)荷載及風(fēng)振響應(yīng)進(jìn)行求解，與風(fēng)洞試驗(yàn)結(jié)果進(jìn)行比較，探究三國規(guī)范風(fēng)荷載的差別與緣由。 (2)研究了單體高層建筑橫風(fēng)向風(fēng)荷載特性與風(fēng)振效應(yīng)。對單體高層建筑進(jìn)行測壓試驗(yàn)，制作1:250的剛性模型，共進(jìn)行24個風(fēng)向角的試驗(yàn)，分析其橫風(fēng)向風(fēng)荷載與風(fēng)振響應(yīng)，利用荷載規(guī)范風(fēng)荷載計(jì)算方法計(jì)算其正交角度下的風(fēng)荷載，將結(jié)果與風(fēng)洞試驗(yàn)結(jié)果進(jìn)行比較。 (3)研究了群體高層建筑橫風(fēng)向風(fēng)荷載特性與風(fēng)振效應(yīng)。對群體高層建筑進(jìn)行測壓試驗(yàn)，制作1:400的剛性模型，共進(jìn)行36個風(fēng)向角的試驗(yàn)，探討其正交角度下的平均和脈動風(fēng)壓分布，分析其橫風(fēng)向風(fēng)荷載與風(fēng)振響應(yīng)，利用荷載規(guī)范風(fēng)荷載計(jì)算方法計(jì)算其正交角度下的風(fēng)荷載，將結(jié)果與風(fēng)洞試驗(yàn)結(jié)果進(jìn)行比較。 (4)將虛擬激勵法引入到高層建筑橫風(fēng)向風(fēng)振響應(yīng)分析中。介紹高層建筑橫風(fēng)向風(fēng)振響應(yīng)虛擬激勵法求解的原理與過程，對單體和群體高層建筑0°風(fēng)向角下的順風(fēng)向、橫風(fēng)向風(fēng)振響應(yīng)進(jìn)行求解，并將計(jì)算結(jié)果與風(fēng)洞試驗(yàn)(功率譜方法)結(jié)果進(jìn)行對比，驗(yàn)證虛擬激勵法的精度，探討高階振型對單體和群體高層建筑的橫風(fēng)向風(fēng)振響應(yīng)的貢獻(xiàn)。
[Abstract]:The crosswind load characteristics and wind-induced vibration effects of high-rise buildings are complex and often become the control loads of high-rise buildings. In this paper, the cross-wind load characteristics and wind-induced vibration effects of high-rise buildings are studied by means of standard wind load calculation method and wind tunnel test method. This paper analyzes the influence of related parameters on the cross-wind load of high-rise buildings, discusses the differences of calculation methods of wind loads between China, Japan and Australia, and conducts wind tunnel tests on the cross-wind effects of individual and group high-rise buildings. The virtual excitation method is applied to the analysis of cross-wind vibration response. The main work is as follows: (1) the influence of related parameters on the cross-wind load of high-rise buildings is analyzed systematically. To explore the differences of wind load calculation methods between China, Japan and Australia. Based on the wind load calculation method of GB50009-2012, the effects of geomorphology, aspect ratio, width to thickness ratio, period, damping ratio and wind pressure on the wind load of rectangular high-rise buildings are studied. The ratio of transverse wind direction to downwind wind load of rectangular high-rise building with cut angle and concave angle is large. In this paper, the calculation method of wind load in code of China, Japan and Australia is used to analyze the transverse wind load of high-rise building with different heights. The wind load and wind vibration response of a building are solved by using the code of China and Japan, and the results are compared with the results of wind tunnel test. The differences and causes of wind loads in the three countries are discussed. (2) the characteristics of wind loads and wind-induced vibration effects of single high-rise buildings are studied. The single high-rise building was tested by pressure measurement, and a rigid model of 1: 250 was made. A total of 24 wind direction tests were carried out. The cross-wind load and wind-induced vibration response were analyzed, and the wind loads at orthogonal angles were calculated by the method of wind load calculation. The results are compared with the results of wind tunnel tests. (3) the wind load characteristics and wind-induced vibration effects of high-rise buildings are studied. This paper makes a rigid model of 1: 400, tests 36 wind direction angles, discusses the distribution of mean and pulsating wind pressure at orthogonal angles, and analyzes the transverse wind loads and wind-induced vibration responses. The wind load under orthogonal angle is calculated by using the method of load code wind load calculation, and the results are compared with the results of wind tunnel test. (4) the virtual excitation method is introduced into the wind vibration analysis of tall buildings in cross wind direction. This paper introduces the principle and process of virtual excitation method for wind vibration response of tall buildings in crosswind direction. The downwind and cross-wind vibration responses of individual and group high-rise buildings are solved under 0 擄wind direction angle. Compared with the results of wind tunnel test (power spectrum method), the accuracy of virtual excitation method is verified, and the contribution of high-order modes to the wind-induced response of individual and group high-rise buildings is discussed.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU973.213

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本文編號：2290018