高层建筑横风向风荷载特性与风振效应研究
发布时间：2018-10-23 17:49
【摘要】：高层建筑横风向风荷载特性与风振效应复杂，往往成为高层建筑的控制荷载，，本文利用规范风荷载计算方法和风洞试验手段对高层建筑横风向风荷载特性与风振效应进行研究。分析了相关参数对高层建筑横风向风荷载的影响，探讨中日澳风荷载规范计算方法的差异，对单体和群体高层建筑横风向风效应进行风洞试验研究，将虚拟激励法引用到横风向风振响应分析中，主要工作有以下几点： (1)系统分析相关参数对高层建筑横风向风荷载的影响规律，探究中日澳规范风荷载计算方法的差异。基于《建筑结构荷载规范》(GB50009-2012)风荷载计算方法，研究地貌类别、高宽比、宽厚比、周期、阻尼比、风压对矩形高层建筑横风向风荷载的影响，比较方形和圆形高层建筑、矩形高层建筑带削角与凹角横风向与顺风向风荷载比值大小。采用中、日、澳三国规范风荷载计算方法，对不同高度高层建筑横风向风荷载进行分析，利用中日规范对一建筑风荷载及风振响应进行求解，与风洞试验结果进行比较，探究三国规范风荷载的差别与缘由。 (2)研究了单体高层建筑横风向风荷载特性与风振效应。对单体高层建筑进行测压试验，制作1:250的刚性模型，共进行24个风向角的试验，分析其横风向风荷载与风振响应，利用荷载规范风荷载计算方法计算其正交角度下的风荷载，将结果与风洞试验结果进行比较。 (3)研究了群体高层建筑横风向风荷载特性与风振效应。对群体高层建筑进行测压试验，制作1:400的刚性模型，共进行36个风向角的试验，探讨其正交角度下的平均和脉动风压分布，分析其横风向风荷载与风振响应，利用荷载规范风荷载计算方法计算其正交角度下的风荷载，将结果与风洞试验结果进行比较。 (4)将虚拟激励法引入到高层建筑横风向风振响应分析中。介绍高层建筑横风向风振响应虚拟激励法求解的原理与过程，对单体和群体高层建筑0°风向角下的顺风向、横风向风振响应进行求解，并将计算结果与风洞试验(功率谱方法)结果进行对比，验证虚拟激励法的精度，探讨高阶振型对单体和群体高层建筑的横风向风振响应的贡献。
[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 掳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.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.213
本文编号：2290018
[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 掳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.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.213
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