上海中心大厦脉动风荷载模拟研究
|
摘要
风荷载是超高层建筑设计的主要荷载之一,对超高层建筑进行风振时程分析能更准确和直观地了解结构风振响应的特性。为了进行风振响应时程分析,必须较为准确地模拟作用在结构上的脉动风荷载。首先,本文采用基于自回归(AR)模型的线性滤波法对上海中心大厦场地的脉动风速时程进行了数值模拟,通过检验模拟脉动风速的功率谱和相干函数平方根与目标值的吻合程度,验证了基于AR模型模拟超高层建筑脉动风速时程的可行性。然后,本文考虑了上海中心大厦外形向上扭转收缩的特点,由模拟的脉动风速时程计算生成作用在结构上的脉动风荷载。
Wind load is one of the main loads in the design of super high-rise buildings,and the wind induced response of super high-rise building can be calculated more precisely and be visually displayed through time history analysis.Therefor,simulating fluctuating wind load time series is necessary for time history analysis of wind induced response.Linear filtering method based on auto-regressive model was used to simulate fluctuating wind speed time series on the site of Shanghai center tower,and the method proves to be effective through comparing the simulated values of wind speed power spectral density and magnitude squared coherence with the target values.Through the simulated fluctuating wind speed,the simulated fluctuating wind load acting on Shanghai center tower was obtained afterwards with consideration of the section shrinkage and torsion.
Wind load is one of the main loads in the design of super high-rise buildings,and the wind induced response of super high-rise building can be calculated more precisely and be visually displayed through time history analysis.Therefor,simulating fluctuating wind load time series is necessary for time history analysis of wind induced response.Linear filtering method based on auto-regressive model was used to simulate fluctuating wind speed time series on the site of Shanghai center tower,and the method proves to be effective through comparing the simulated values of wind speed power spectral density and magnitude squared coherence with the target values.Through the simulated fluctuating wind speed,the simulated fluctuating wind load acting on Shanghai center tower was obtained afterwards with consideration of the section shrinkage and torsion.
引文
[1]黄本才,汪丛军.结构抗风分析原理及应用(第二版)[M].上海:同济大学出版社,2008.
[2]武占科,赵林,朱乐东.上海环球金融中心工程场地良态风环境特性观测分析[J].结构工程师,2009,25(2):98-103.
[3]张希黔,葛勇,严春风,晏致涛.脉动风场模拟技术的研究与进展[J].地震工程与工程振动,2008,28(6):206-212.
[4]舒新玲,周贷,王永芳.风荷载测试与模拟技术的回顾及展望[J].振动与冲击,2002,21(3):6-12.
[5]王之宏.风荷载的模拟研究.建筑结构学报[J].1994,15(1):44-52.
[6]刘锡良,周颖.风荷载的几种模拟方法[J].工业建筑,2005,35(5):81-84.
[7]丁阳,赵奕程.大跨度空间结构风荷载数值模拟研究[J].工业建筑,2005,增刊:454-461.
[8]何书元.应用时间序列分析[M].北京:北京大学出版社,2003.
[9]舒新玲,周岱.风速时程AR模型及其快速实现[J].空间结构,2003,9(4):27-32.
[10]李春祥,都敏,韩兵康.基于AR模型模拟超高层建筑的脉动风速时程[J].地震工程与工程振动,2008,23(3):87-94.
[11]汪大洋,周云,刘纯.高层结构脉动风场的空间相关性数值模拟研究[C].第十三届全国结构风工程学术会议论文集:188-192.
[12]李元齐,董石麟.大跨度空间结构风荷载模拟技术研究及程序编制[J].空间结构,2001,7(3):3-12.
[13]陈厚金.数字信号处理[M].北京:高等教育出版社,2004.
[2]武占科,赵林,朱乐东.上海环球金融中心工程场地良态风环境特性观测分析[J].结构工程师,2009,25(2):98-103.
[3]张希黔,葛勇,严春风,晏致涛.脉动风场模拟技术的研究与进展[J].地震工程与工程振动,2008,28(6):206-212.
[4]舒新玲,周贷,王永芳.风荷载测试与模拟技术的回顾及展望[J].振动与冲击,2002,21(3):6-12.
[5]王之宏.风荷载的模拟研究.建筑结构学报[J].1994,15(1):44-52.
[6]刘锡良,周颖.风荷载的几种模拟方法[J].工业建筑,2005,35(5):81-84.
[7]丁阳,赵奕程.大跨度空间结构风荷载数值模拟研究[J].工业建筑,2005,增刊:454-461.
[8]何书元.应用时间序列分析[M].北京:北京大学出版社,2003.
[9]舒新玲,周岱.风速时程AR模型及其快速实现[J].空间结构,2003,9(4):27-32.
[10]李春祥,都敏,韩兵康.基于AR模型模拟超高层建筑的脉动风速时程[J].地震工程与工程振动,2008,23(3):87-94.
[11]汪大洋,周云,刘纯.高层结构脉动风场的空间相关性数值模拟研究[C].第十三届全国结构风工程学术会议论文集:188-192.
[12]李元齐,董石麟.大跨度空间结构风荷载模拟技术研究及程序编制[J].空间结构,2001,7(3):3-12.
[13]陈厚金.数字信号处理[M].北京:高等教育出版社,2004.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心