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VISCOELASTIC DEFORMATION MECHANISM OF SOIL-PILE INTERACTION SUBJECTED TO HORIZONTAL LOADS
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摘要: 横向荷载作用下桩基础的长期内力及变形效应与周围土体介质的流变性密切相关。基于黏弹性理论，考虑横向受荷桩基础周围土体的黏弹性，根据集中力弹簧模型和桩土位移协调方程，研究了横向荷载作用下桩基础与周围土体共同作用问题，建立了横向荷载作用下柔性桩及刚性桩的横向变形与内力长期效应分析的基本方法。鉴于理论解答的公式复杂性，针对以上研究内容，编制了相应的计算程序，可方便应用于实际工程计算。工程算例分析表明，对横向荷载作用下的桩基础，很有必要进行考虑土体黏弹性的桩基础长期变形与内力的分析与计算。Abstract: The long-term internal force and deformation of pile foundation are directly related to the viscoelasticity of soil,especially in soft clay region.According to the displacement coordinative relationship between vertical pile and soil,the viscoelastic deformation mechanism of soil-pile interaction subjected to horizontal loads is analyzed by the concentrated spring model,taking account of viscoelastic characteristics of soil.The computer program is developed for applying to engineering practice.Selected example was given by making use of the presented method.The proposed method is more perfect in theory and calculation amount is moderate to practical application.The calculation results show that the new theory is feasible and applicable.The solution of this paper is of some significance both to engineering practice and to the theoretical research of pile foundation.
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Key words:
- pile foundation /
- horizontal load distribution /
- viscoelasticity /
- internal force /
- displacement
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