新型倒T式防波堤结构长期变形特性预测方法

发布时间：2018-06-20 22:35

本文选题：新型倒T式防波堤结构 + 长期变形特性　；参考：《科学技术与工程》2017年32期

【摘要】：新型倒T式防波堤结构是可供深水环境软土地基选用的一种新型港工结构型式。深水环境中结构所受波浪力、水流力等长期循环荷载作用显著,但其长期变形特性尚不清楚。为探讨该类结构长期变形特性,基于波浪等循环荷载长期作用下软黏土变形与循环次数之间相互关系同静荷载作用下土体蠕变与时间之间相互关系类似的特性,借鉴蠕变理论,采用幂指数函数拟合饱和软黏土循环三轴试验结果,结果显示二者吻合较好,说明基于蠕变理论采用幂指数函数预测饱和软黏土长期变形的方法是可行的。进一步,利用ABAQUS二次开发平台Creep子程序实现了这一方法的有限元计算手段,建立了预测饱和软黏土长期变形的有限元实用简化计算方法。最后,采用该方法探讨了新型倒T式防波堤结构的长期变形特性。
[Abstract]:The new inverted T breakwater structure is a new type of harbor structure which can be selected for the soft soil foundation in deep water environment. The long-time cyclic loads such as wave force, current force and so on are significant in deep water environment, but the long-term deformation characteristics are not clear. In order to study the long-term deformation characteristics of this kind of structures, based on the similar relationship between the deformation and cyclic times of soft clay under the long-term action of wave and equal cyclic load and the relationship between creep and time under static load, the creep theory is used for reference. The results of cyclic triaxial test of saturated soft clay are fitted by power exponent function. The results show that the method of predicting long-term deformation of saturated soft clay by power exponential function based on creep theory is feasible. Furthermore, the finite element method for predicting the long-term deformation of saturated soft clay is established by using the Creep subroutine of Abaqus secondary development platform, and a practical simplified finite element method is established for predicting the long-term deformation of saturated soft clay. Finally, the long-term deformation characteristics of a new inverted T-type breakwater are discussed by using this method.
【作者单位】：重庆交通大学内河航道整治技术交通行业重点实验室国家内河航道整治工程技术研究中心;重庆交通职业学院;重庆水利电力职业技术学院;
【基金】：重庆市教委基金(KJ150518) 重庆市基础与前沿研究科学基金(cstc2016jcyj0123) 重庆交通大学内河航道整治技术交通行业重点实验室开放基金(NHHD-201506)资助
【分类号】：U656.2

【相似文献】