基于实测水压力的跨海桥梁围堰波浪力计算_魏凯.pdf

【摘要】 为准确计算跨海桥梁施工围堰的波浪荷载,提出一种基于现场实测水压力的围堰波浪力计算方法。以平潭海峡公铁两用大桥B39号墩施工围堰为背景,现场实测围堰主迎浪面的水压力,根据实测水压力数据计算围堰主迎浪面上的波浪动力荷载,并采用AQWA软件建立围堰的三维数值模型,基于三维线性绕射理论计算围堰上的波浪动力荷载,与根据实测水压力计算得到的波浪动力荷载进行对比。结果表明:围堰的波流荷载随时间变化呈周期性变化,波浪动力荷载在0附近上下波动;根据实测水压力计算的波浪荷载和数值模拟的波浪荷载随时间变化趋势基本吻合,提出的波浪荷载计算方法能较准确地计算围堰受到的波浪动力荷载峰值。 

【Abstract】 In order to accurately calculate the wave loads on the cofferdams for construction of sea-crossing bridge,a method based on the hydraulic pressure field measurement for calculating the wave forces acting on the cofferdams was proposed.An actual cofferdam used for construction of the pier B39 of the Pingtan Rail-cum-Road Straits Bridge Project was cited as an example.The water pressure on the cofferdam surface was measured in the field.The wave forces on the cofferdam were then estimated based on... 

【关键词】 跨海桥梁； 施工围堰； 波浪荷载； 现场实测； 水压力； 数值模拟；