摘要
数值模拟方法的风速时程曲线在桥梁结构风振分析中被广泛采用。基于自然风特性,通过考虑结构节点间的风速时程相关性,采用谐波合成法模拟了重庆菜园坝长江大桥脉动风速时程。对模拟结果统计分析表明:谐波合成法可有效地模拟具有空间相关性、时间相关性的节点脉动风速时程,模拟精度、速度和计算稳定性均满足实际工程应用要求。
Wind speed time series obtained with numerical simulation methods are widely adopted in structural analysis of wind-induced vibration. Based on the natural wind properties and the correlativity of nodal winds, CAWS （Constant Amplitude Wave Superposition） is employed to simulate wind speed time series of the Caiyuanba Changjiang Bridge in Chongqing. Statistical analysis of the results of numerical wind speed time series show that CAWS is efficient in simulating the time series of nodal wind speed wihich has spatial and time correlativity and the precision and efficiency of simulation and the calculation stability shall meet the needs of practical engineering.
出处
《中国港湾建设》
北大核心
2005年第4期19-21,共3页
China Harbour Engineering
关键词
桥梁工程
风荷载
风速时程
谐波合成法
空间相关
bridge works
wind load
wind speed time series
CAWS
spacial correlativity
