摘要
吸力锚可作为深海系泊系统基础,其水平承载力与系泊点位置有关。基于三维有限元方法,考察了吸力锚基础的水平承载特性,计算得到了变形网格、位移增量分布、位移等值面分布等结果,探讨了系泊点位置与水平极限承载力之间的定量关系。计算表明,系泊点位置沿着吸力锚基础顶部到底部变化过程中,吸力锚的破坏趋势由向前倾覆破坏过渡到平动破坏,再转变为向后倾覆破坏,水平极限承载力先逐渐增大后逐渐减小。吸力锚平动破坏时,其周边土体被动土压力区面积取得最大值,此时水平极限承载力取得最大值。实际工程中应根据具体条件进行确定吸力锚基础的最优系泊点。
Suction anchor can be used as the basis of deep sea mooring system,and its horizontal bearing capacity is related to the position of mooring point. Based on three-dimensional finite element method,the horizontal bearing capacity of suction anchor foundation in ocean engineering has been studied,the deformed mesh,incremental displacement,contour plane of displacement have been obtained,and the relationship between mooring point and horizontal ultimate bearing capacity of suction anchor foundation has been revealed. It is found that during the position of mooring point moving from the top of foundation to the bottom of foundation,the failure modes of suction anchor foundation changed from forward overturning to translational failure,and then backward overturning,and the value of horizontal ultimate bearing capacity of suction anchor foundation gradually increased firstly and then gradually reduced later. When suction anchor foundation reached the state of translational failure,the area of soil in passive earth pressure zone around suction anchor foundation reaches its maximum value,and the horizontal ultimate bearing capacity of suction anchor foundation reaches its maximum value. In engineering practice,the optimal position of mooring point of suction anchor foundation should be determined according to its specific conditions.
出处
《土木工程与管理学报》
北大核心
2016年第2期1-5,共5页
Journal of Civil Engineering and Management
基金
国家自然科学基金(41306088)
安徽省自然科学基金(1308085ME61
1308085QE85)
关键词
吸力锚基础
水平承载力
系泊点
位移增量
平动破坏
suction anchor foundation
horizontal bearing capacity
mooring point
displacement increment
translational failure
