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针对现行规范中桥墩总动水压力计算公式存在的不足,提出了考虑动水压力后桥墩随水深分布的计算公式,并在有限元计算模型中采用附加质量方法来考虑地震动水压力的影响,计算了某连续钢构桥的地震时程响应,比较了不考虑、考虑动水压力两种情况下桥梁地震响应的计算结果。结果表明,无论从位移还是内力来说,考虑动水压力后的地震响应均有较大增幅,因此在深水桥墩计算中必须考虑地震动水压力。
Aiming at the shortcomings of the existing formulas for calculating the total hydraulic pressure of bridge piers in current code, the formulas for calculating the distribution of piers with water depth considering the hydrodynamic pressure are put forward. The additional mass method is used to consider the influence of the hydrodynamic pressure on the finite element model. The seismic response of a continuous steel bridge was calculated and the results of seismic response calculation of bridge under two conditions without considering and considering hydrodynamic pressure were compared. The results show that both the displacement and the internal force have a great increase in the seismic response considering the hydrodynamic pressure, so the hydrodynamic pressure must be considered in the calculation of deep-water pier.