摘要
基于已有的风速观测记录 ,对京沪高速铁路南京长江大桥桥址区的风向分布进行了统计分析。针对风速观测记录的特点 ,证明了利用不同高度处月最大风速记录推算地表粗糙度系数的可行性 ,并对通过最小二乘拟合得到的地表粗糙度系数进行了统计分析。最后分别根据原始风速观测记录和基本风压分布图推算了该桥的设计基准风速。上述研究将为该桥进一步的抗风分析提供依据。
On the basis of the wind speed observation, the wind direction distributing of the site of Nanjing Changjiang River Bridge on Beijing-Shanghai high-speed railway was analyzed. Considering the feature of the wind speed records, it was proved that the exponent expressing terrain roughness could be calculated according to monthly maximum wind speed records at different heights. Also, the exponents fitted by the least square method were analyzed. Finally the design wind speed of the bridge was carried out respectively according to both the original wind speed observation and national wind pressure-distributing map. The research results could provide the foundation for the farther wind resistant analysis.
出处
《桥梁建设》
EI
CSCD
北大核心
2002年第4期5-7,共3页
Bridge Construction
