摘要
确定长大、高耸柔性结构设计风速是抗风设计的首要内容。对于我国东南沿海椒江入海口复杂场地条件,由周边气象站历史风速风向资料统计分析表明,利用规范建议的极值分布概型预测重现期设计风速存在不合理性,台风登陆衰减效应导致临近工程场地多个气象站极值风速预测结果差别较大,采用线性回归方法加权换算工程场地设计风速可以较为合理地定义结构设计基本风速。参考长三角地区Monte-Carlo台风随机模拟结果,进一步有针对性地分析了不同气候模式风环境参数取值对于结构风荷载取值的影响。
Determining the design wind speed of long-span and high-rise structures plays an important role in wind-resistant design. The probability statistics analysis indicate that type Ⅰ,Ⅱ,Ⅲ extreme value distri- bution proposed by the Codes maybe unreasonable, especially under complex terrain conditions on the southeastern coastal areas. The wind speed predictions of different nearby meteorological stations are uneven due to the typhoon land-decay effect. However, linear regression method based on a weighted wind velocity conversion can more reasonably define the basic design wind speed for the complex terrain conditions. Referred to the Monte-Carlo normal and typhoon stochastic simulation results of the Yangtze River Delta region, the wind loads based on wind environment parameters were further analyzed and compared.
出处
《空气动力学学报》
EI
CSCD
北大核心
2009年第5期553-560,共8页
Acta Aerodynamica Sinica
基金
国家自然科学基金重点项目(90715039)
青年科学基金项目(50408035)
国家科技支撑计划(2008BAG07B02)联合资助
关键词
风环境参数
台风气候
良态气候
复杂场地条件
线性回归
wind environment parameters
typhoon climate
normal climate
complex terrain conditions
linear regression
