波浪荷载作用下桶形基础循环承载力数值模拟

NUMERIACAL SIMULATION OF CYCLIC BEARING CAPACITY OF BUCKET FOUNDATION UNDER WAVE LOADS

对桶形基础在工作荷载和波浪荷载共同作用下的循环承载力进行研究.以海洋软土地基上单桶基础为例,通过平面有限元数值模拟确定桶形基础在工作荷载作用下的静承载力.进而考虑工作荷载和波浪荷载共同作用下软土地基强度的弱化,使用平面有限元数值模拟确定波浪荷载作用下桶形基础的循环承载力.研究结果表明,一定的循环振次下,海洋环境中桶形基础循环承载力的大小取决于基础自身工作荷载.文中结论为海洋工程中桶形基础的设计和使用提供了理论依据.

Cyclic bearing capacity of bucket foundation subjected to working loads and wave loads has been studied. In this paper, the vertical and horizontal static capacity of bucket foundation on oceanic soft clay is first calculated. Further, the vertical and horizontal cyclic bearing capacity is determined for bucket foundation through plane finite element analysis ,with degradation of soft clay strength caused by working loads and wave loads taken into consideration. Conclusion is drawn that the cyclic bearing capacity depends on dead loads if the cyclest number keeps within certain range. Cyclic bearing capacity varies with different dead loads. This paper provides a theoretical reference for designing and using bucket foundation in oceanic engineering.