【摘要】 对地震下圆柱形桥墩上的动水压力,提出了一个半解析半数值方法,针对弹性桥墩结构,利用Trefftz完备函数分别构造了流体的弹性振动速度势和刚体运动速度势,采用梁单元有限元方法求解耦联运动方程,与其他方法相比,这一方法计算相对简单、有效,并可考虑表面波效应和流体的压缩影响.算例表明,这一方法具有较高的精度.更多还原

【Abstract】 A semi-analytical and semi-numerical approach for earthquake induced hydrodynamic pressure on pier was developed. Trefftz-complete functions were used to form the potentials of rigid movement and those of elastic vibration. The coupling kinetic equations were solved by finite element method with beam elements. This method is a relatively simple and efficient approach, retaining the gravity waves on the water surface and the compressibility. Examples were presented to illustrated the accuracy of this method.更多还原