长江科学院院报2012，Vol.29Issue(1)：69-73,5.
海洋平台地基基础变形破坏离心模拟和极限分析
Failure Mechanism of Suction Foundation of Offshore Platform Based on Centrifuge Modeling and Limit Analysis
摘要
Abstract
The paper presents the results of centrifuge model tests performed to study the failure mechanism of suction bucket foundation of offshore platform under cyclic lateral vibration loads. Electromagnetic actuator with wide frequency range and heavy load used in the tests was developed in light of China's offshore geological conditions and ocean environments. Two failure modes might happen; liquefaction in the early excitation and settlement-induced problem after long-term excitation. However, with increased stiffness of the large diameter cylinders, the pore pressures and the induced settlement decrease. A three dimensional limit analysis method by which the joint effect of lateral load, horizontal load and bending moment could be considered was proposed based on upper boundary theorem of plastic mechanics to simulate the soil-foundation system. The results of numerical analysis were basically in agreement with the centrifuge modeling results.关键词
吸力式基础/离心机/孔隙水压力Key words
suction foundation/ centrifuge/ pore water pressure分类
建筑与水利引用本文复制引用
张建红,林小静,熊中生,鲁晓兵..海洋平台地基基础变形破坏离心模拟和极限分析[J].长江科学院院报,2012,29(1):69-73,5.基金项目
国家自然科学基金重点项目(51038007) （51038007）
