文章摘要
王志云,栾茂田,杨庆,王忠涛,张其一.循环加载条件下吸力式沉箱基础极限承载力特性分析[J].,2009,(3):414-418
循环加载条件下吸力式沉箱基础极限承载力特性分析
Numerical analysis of ultimated bearing capacity behavior of suction caisson foundations under cyclic loading
  
DOI:10.7511/dllgxb200903020
中文关键词: 吸力式沉箱基础  有限元分析  循环承载力  拟静力分析  破坏包络面
英文关键词: suction caisson foundation  finite element analysis  cyclic bearing capacity  quasi-static analysis  collapse envelope
基金项目:国家自然科学基金资助项目(50579006,50639010).
作者单位
王志云,栾茂田,杨庆,王忠涛,张其一  
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中文摘要:
      循环加载模式下吸力式沉箱基础的拉拔承载性能目前尚缺乏合理的分析与计算方法.应用Andersen等对重力式基础及地基所建议的分析方法,将软土的循环强度与Mises屈服准则相结合,针对吸力式沉箱基础,采用大型通用有限元分析软件ABAQUS进行了三维拟静力有限元分析,确定了循环加载模式下吸力式沉箱的循环承载力及其破坏包络面,并与单调加载作用下沉箱基础的极限承载力及其破坏包络面进行了对比.结果表明,与单调加载情况相比,循环加载作用下吸力式沉箱基础的拉拔承载能力显著降低,而沉箱长径比对基础循环承载力降低效应的影响不大.
英文摘要:
      To rationally evaluate the uplift bearing capacity behavior of suction caisson foundation under cyclic loading pattern, a 3D quasi-static numerical procedure based on FEM for evaluating the uplift bearing capacity behavior of suction caisson foundation is developed. Based on the framework of the general-purpose finite element analysis software ABAQUS, applying Andersen′s analytical method about gravity foundation and combining cycle strength of soft soil and Mises yield criterion, the cyclic bearing capacity and collapse envelope of suction caisson foundation under cyclic loading pattern are determined. Then comparative numerical computations are performed for different aspect ratios of caisson foundation under monotonically combined loading pattern and cyclic combined loading pattern. The experimental results indicate that the uplift bearing capacity behavior of suction caisson foundation under cyclic loading pattern is significantly reduced compared with that under monotonically loading pattern, and the aspect ratio of caisson has little influence on the reduced effect of cyclic bearing capacity.
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