深水桥墩地震动水压力计算方法及建议

Calculation Method and Suggestion of Seismic Hydrodynamic Pressure of Deep Water Bridge Pier

近年来,中国跨海、跨江大桥的建设发展迅猛。受水体环境影响,多数深水桥墩采用低承台建造方式,将墩身置于水体中。中国地震频发,深水桥墩在地震激励下会受到地震动水压力的作用,这会对桥梁结构的动力特性及地震响应产生显著影响。然而,目前地震动水压力计算方法的研究相对较少,且不同计算方法的计算精度及适用范围不尽相同。基于此,针对目前常用的地震动水压力计算方法进行了简要分析,并从设计角度给出了相应的建议。

In recent years,the construction of sea-crossing and river-crossing bridges in China has developed rapidly.Affected by the water environment,most deepwater bridge piers are constructed with low caps and the piers are placed in the water.Earthquakes occur frequently in China,and deepwater bridge piers will be affected by seismic hydrodynamic pressure under seismic excitation,which will have a significant impact on the dynamic characteristics and seismic response of the bridge structure.However,there are relatively few researches on calculation methods of seismic hydrodynamic pressure at present,and the calculation accuracy and scope of application of different calculation methods are different.Based on this,a brief analysis is made on the commonly used seismic hydrodynamic pressure calculation methods,and the corresponding suggestions are given from the design perspective.