【摘要】 介绍了Morison方程考虑动水压力的方法,并计算出了桥墩各部位的动水附加质量.分析了高桩承台桥墩在不同水深和不同地震作用下动水压力对其地震反应的影响,以某黄河大桥的一个高桩承台桥墩为工程实例,利用纤维模型对其进行非线性时程反应分析.结果表明水的存在对高桩承台桥墩动力特性和地震反应的影响较大,因此在进行桥梁抗震设计时动水压力的影响不可忽略.更多还原

【Abstract】 The method of Morison equation with consideration of hydrodynamic pressure is introduced and hydrodynamic added mass of pier is calculated.The finite element model is established,which takes an elevated pile cap of Yellow River Bridge as engineering background,and the nonlinear time history response is analyzed by using the fiber model under the condition of the difference of ground motion and water depth.The results indicated that dynamic characteristics and seismic response are influenced greatly by the existence of water,so the effect of hydrodynamic pressure can not be ignored in design.更多还原