【作者】 陈胜；

【导师】 李正良；

【作者基本信息】 重庆大学 ， 结构工程， 2010， 硕士

【摘要】 随着近三十年我国经济的飞速发展,高层建筑得到了蓬勃的发展空间,在城市现代化的进程中扮演着标志性的角色。于此同时,由于风荷载的作用,使得高层建筑的安全性、经济型和舒适性得到了进一步的挑战。本文主要是研究超高层建筑的风压特性,所以对于天成大厦的裙楼部分省去,只讨论主体结构。本文以重庆市天成大厦的风洞试验项目为工程背景,分析研究了天成大厦的主体结构在频域上进行的风压分布以及特性,并利用本证正交分解(POD)法对测点的脉动风压进行了重组和预测。本文主要的工作如下:本文的第一部分工作是对本次风洞试验的概况做了详细的阐述:包括试验设备和方法、边界层的模拟;以及对试验模型的设计、制作;后续数据的处理方法等。本文的第二部分工作是对天成大厦的主体结构在频域上进行的风压分布以及特性做了全面的分析和研究。选取特定风向角下,特定高度处的测点进行风压系数的频域分析;以及研究风压系数沿高度变化的频域特性,最后研究在特定风向角下表面风压系数的水平和竖向相关性。本文的第三部分工作是利用非均匀分布测点风压的本征正交分解(POD)法,对建筑主体结构部分测压点的脉动风压进行分解、重组,并与原始风压进行对比,计算它们之间的误差,同时分析这些误差产生的原因。此外根据本征正交分解(POD)法原理以及原始风压场,对未布置测压点处的风压系数进行预测。更多还原

【Abstract】 With nearly three decades the rapid development of China’s economy, super-rise building has been vigorous development of space and played the iconic role in the process of modernization in the city. Meanwhile, due to wind load, super-rise buildings’safety, economical and comfort have been further challenge. This thesis is to research the characteristics of super-rise building wind pressure. The characteristics of the main structure of the wind pressure are discussed only, but no the podium section of Tiancheng Building. The thesis is based on Wind Tunnel Test of Chongqing Tiancheng Building. This thesis analyses the wind pressure distribution and characteristics of Tiancheng Building in the frequency domain. Then, this thesis applies Proper Orthogonal Decomposition (POD) method to decompose. Following points are main achievement of this thesis.The first part of the thesis gives a detailed description of the wind tunnel tests, including research equipment and methods, the boundary layer simulation, and the model design, production, at last, introduces the follow-up data processing methods.The second part of the thesis analyses wind pressure distribution and characteristics of Tiancheng Building in the frequency domain. Frequency domain characteristics of the specific height are analyzed in the specific wind direction. And frequency domain characteristics of wind pressure are researched with the change of wind pressure coefficient along the height. Finally, the surface wind direction and wind pressure coefficients of horizontal and vertical correlation are analyses under a particular angle.The third part of the thesis decomposes and reconstructs the pressure taps of the some main body structure by the Proper Orthogonal Decomposition (POD) of wind pressure specified at non-uniformly distributed, compare with the original pressure, calculate the error between them, and analyzes the causes of these errors. In addition, it forecasts the wind pressure coefficient of the non-arrangement pressure points under the proper orthogonal decomposition (POD) method and the original wind field theory.更多还原