【摘要】 目前我国在地下结构抗震分析与破坏灾变机理研究中尚存在诸多问题需要解决,在分析总结我国地下结构抗震理论与试验研究的基础上,重点阐述了需要进一步深入研究的六个关键问题:地下结构振动模型试验研究技术,土体非线性动力本构模型,高轴压的地下结构承重构件地震破坏机理,非一致波动输入及非一致波动输入下地下结构的地震反应,饱和砂土液化大变形理论及本构模型,大型三维非线性土-结构动力相互作用分析模型。这些问题的研究和解决对于完善地下结构抗震理论分析方法与试验研究技术,获得大型地下结构在地震作用下的反应规律与破坏灾变机理具有重要的科学意义和工程应用价值。更多还原

【Abstract】 So far,there are still many unsolved problems in seismic analysis and failure mechanism study of underground structures in China.On the basis of analyzing and summarizing the existing theoretical analysis and experimental study of seismic response of underground structures,six key issues need to be seriously considered and further studied in the near future.They are model techniques of shaking tests for underground structures,nonlinear dynamic constitutive model of soil,seismic failure mechanism of bearing members of underground structures under high axial loads,asynchronous seismic wave motion input and seismic response of underground structures under it,physical fundamentals and constitutive model of large post-liquefaction deformation of saturated sand,and finally large-scale three-dimensional nonlinear dynamic soil-structure interaction model.Study on the issues above will give some help to consummate theoretical seismic analysis methods and model test techniques of underground structures,and to get seismic response characteristics and failure mechanism of large-scale underground structures,which have vital scientific meanings and great value in engineering practice.更多还原