摘要
对大港油田桶形基础采油平台稳定性进行研究。通过三维有限元数值模拟,计算平台基础的静承载力,并将循环荷载作用效果等效为一种与地基土初始静应力有关的地基土强度的变化,计算平台基础的循环承载力。进而,对平台基础在自身工作荷载以及工作荷载和环境荷载共同作用下的稳定性进行评价。结果显示,该平台基础上的工作荷载仅为竖向静承载力的14%,按照平台基础所处的海洋环境,当不考虑海洋环境荷载的动力特性时,水平静承载力安全系数3.75;当考虑频率为0.1Hz规则的波浪荷载连续作用在平台基础上3个小时,水平循环承载力安全系数3.42。该平台基础偏于安全。
The static and cyclic stability of bucket foundation platform has been studied. Through three-dimensional finite element numerical simulating, the static capacity and cyclic capacity considering cyclic degradation strength of soil element related to soil element static stress have been ealculated. Further, evaluating foundation platform stability under dead loads and dead loads combined cyclic loads, respectively. Following conclusions can be obtained. The dead load is only 14 percent of the vertical static capacity of foundation platform. In certain ocean condition, the safety factor of horizontal static capacity is 3. Y5 unconsidering dynamic character of environment loads; the safety factor of horizontal cyclic capacity is 3. 42 when waves loads which frequency is 0.1 Hz act on the foundation platform for three houres. So the foundation platform is safety.
出处
《中国海洋平台》
2008年第1期26-30,共5页
China offshore Platform
基金
国家自然科学基金项目(50379035)
关键词
海洋工程
桶形基础平台
三维有限元数值模拟
循环稳定性
ocean engineering
bucket foundation platform
three-dimensional finite element numerical simulating
cyclic stability
