| 摘要: |
| 【目的】比较土体动力反应分析方法的优劣，并指出其研究发展的方向。【方法】以动力固结理论和瞬态动力学理论为基础，将物态本构模型引入到动力反应与动力固结相耦合、静应力和动应力变化相耦合、孔压的产生、扩散与消散相耦合的瞬态动力固结方程中，以砂土路基作为数值分析对象，比较了物态本构模型、孔压模型和等效粘弹性分析孔压特性和残余变形特性的差异。【结果】基于孔压模型的等效粘弹性土体动力反应分析是一个平均过程，体现不出某一时刻土体的实际性态，而基于物态本构模型的瞬态动力反应分析反映了孔压的瞬态变化的波动，体现了土体任意时刻的真实性态。【结论】以动力固结和瞬态动力学理论为基础的反应地震过程中，土体物态变化的动力反应分析方法将动力反应与动力固结耦合在一起，能够真正地反映实际土体的真实性态，是一种有发展前景的科学方法。 |
| 关键词: 动力反应 非线性 孔压模型 有效应力物态本构关系 瞬态理论 |
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| 基金项目:国家自然科学基金项目(50778152) |
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| Study on dynamic response analysis method of soils |
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| Abstract: |
| 【Objective】This study compared the dynamic response analysis method of soils,and pointed out the direction of the research development.【Method】The governing equation on the basis of transient dynamic theory was established,by drawing into it the effective stress and physical states dynamic constitutive relationship and coupling the dynamic response and dynamic consolidation,static stress and dynamic stress,pore water pressure generation,pore water pressure diffusion,dissipation with each other so as to simulate the true process of stress-strain response of soil mass.The physical states,pore water and equivalent viscidity elasticity constitutive relationship ansysing pore water pressure and remainder distortion characteristic difference were compared.【Result】Dynamic response analysis method of soils based on pore water model reflected average process，not representing actual speciality of soils at any time，but analysis method of the transient dynamic response showed pore water pressure transient wave,representing soils actual speciality.【Conclusion】The dynamic response analysis method,on the basis of dynamic consolidation and transient dynamic theory,coupling with the dynamic response and dynamic consolidation,true imaging soils actual speciality,has a bright prospect for development. |
| Key words: dynamic response non-linear pore water pressure model effective stress and physics state dynamic constitutive relationship transient theory |
