Earthquake-Induced Added Hydrodynamic Pressure on Circular Hollow Piers in Deep Water
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摘要: 基于辐射波浪理论建立了圆形空心桥墩流体控制方程;以自由表面波动条件、水底水质点运动边界条件和结构与水的速度连续条件为边界条件,采用分离变量法推导了圆形空心桥墩内域水体速度势的一般解,进而导出了圆形空心桥墩内域水体附加动水压力的解析式,对希腊Rion-Antirion Bridge桥塔内力响应的计算结果表明,附加动水压力使桥墩的弯矩和剪力明显增大,内域水对桥墩地震响应的影响不可忽略.Abstract: Based on the radiation wave theory,a liquid control equation for hollow circular piers was deduced under the condition of free surface wave,the movement boundary condition of bottom water particles,and the continuity condition of structure and water velocities.By applying the variable separation method,a method of calculating the velocity of water in the inner area of a hollow circular pier was gained.Furthermore,an analytical method for added hydrodynamic pressure of water in the inner area of a hollow circular pier was proposed.A calculation of the added hydrodynamic pressure for Rion-Antirion bridge in Greece shows that the added hydrodynamic pressure will result in the increases of bent moment and shear force,and the effect of water in the inner area of a hollow circular pier can not be neglected.
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Key words:
- deep-water bridge /
- circular hollow pier /
- hydrodynamic pressure /
- earthquake response
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