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以深水连续刚构桥为研究对象,采用Morison方程计算动水压力,从频谱、水深、结构周期3个方面考虑行波效应对深水桥梁进行地震响应分析。研究表明:动水压力对深水桥墩地震响应的影响随着波速的不同而变化,并且考虑行波效应时,动水压力对深水桥墩地震响应的影响还与地震波的频谱特性及计算的项目有关;考虑行波效应计算动水压力对深水桥墩地震响应的影响程度跟水深和结构固有周期有关。由此得出结论,大跨度深水桥梁地震响应分析应合理地考虑行波效应和动水压力。
Taking deepwater continuous rigid frame bridge as the research object, the hydrodynamic pressure was calculated by Morison equation, and the seismic response analysis of deepwater bridge was carried out considering the wave, wave, water depth and structure period. The results show that the influence of hydrodynamic pressure on the seismic responses of deepwater piers varies with different wave velocities, and the effect of hydrodynamic pressure on the seismic responses of deepwater piers is also related to the spectral characteristics of the seismic waves and the calculated project when traveling wave effects are considered. The effect of hydrodynamic pressure on the seismic response of deepwater pier considering the traveling wave effect is related to the depth of water and the natural period of the structure. It is concluded that the seismic response analysis of long-span deep-water bridges should consider the traveling wave effect and hydrodynamic pressure reasonably.