【摘要】 首先分析了节段式沉管隧道地震响应受力特性,明确了结构动力响应的温度敏感性,指出管节及节段接头为抗震的薄弱部位及抗震关注重点;其次,在分析国内外沉管隧道抗震研究的基础上,分析了节段式沉管隧道抗震研究需要解决的关键技术,主要包括沉管隧道土与结构相互作用的动力计算方法、非一致地震激励下沉管隧道地震响应分析方法以及沉管隧道振动台试验模拟技术;最后总结了节段式沉管隧道的研究进展及主要成果。更多还原

【Abstract】 Firstly dynamic characteristics of seismic response of the segmental immersed tunnel are analyzed.Temperature variations have significant impact on the dynamic characteristics of segmental immersed tunnel.Critical for the seismic safety of immersed tunnels is the magnitude of deformations developing in the elemental and segmental joints,which should be simulated correctly in the dynamic model and focused on as a result.Secondly based on the literature reviews of the present seismic research on immersed tunnels,the key technical problems of seismic research for segmental immersed tunnel are analyzed,which includes calculating method for dynamic interaction between structure and soils,analytical method for seismic response of super long immersed tunnel subjected to non-uniform seismic loading,and shaking table test technology of immersed tunnel subjected to non-uniform seismic loading.Especially for the shaking table test technology,only the shaking table of bridge structures subjected to non-uniform seismic loading is studied.So no ripe experience is used for the immersed tunnel shaking table.At last,the present study and main achievements for the seismic analysis of immersed tunnel are summarized.更多还原