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为确保跨海桥梁结构安全,需要进行地震响应分析。同时,由于地震可能引发海啸,有必要分析地震海啸作用对深水桥梁动力响应的影响。本文考虑地震海啸作用,同时采用辐射波浪理论考虑桥墩地震动水压力,对近海深水桥梁结构进行地震响应分析。研究表明:海啸作用增大了桥梁结构的动力响应,其影响随着海啸浪高的增加而增大;海啸浪高较大会导致桥梁结构发生损伤破坏直至丧失承载能力。综上所述,近海深水桥梁结构抗震设计应合理考虑地震海啸作用的影响。
In order to ensure the structural safety of the bridge across the sea, an earthquake response analysis is required. At the same time, it is necessary to analyze the impact of earthquake and tsunami on the dynamic response of deepwater bridges due to the possible tsunami triggered by the earthquake. In this paper, the earthquake and tsunami effects are considered. At the same time, the radiative wave theory is used to consider the seismic water pressure of bridge piers and the seismic response analysis of the offshore deep-water bridge structure is carried out. The research shows that the tsunami effect increases the dynamic response of the bridge structure, and its influence increases with the increase of the tsunami wave height. The bigger the tsunami wave height is, the more damage the bridge structure will be and the loss of the bearing capacity will occur. To sum up, the seismic design of offshore deep-water bridge structures should reasonably consider the impact of earthquake and tsunami.