摘要
针对圆弧滑动面法已无法准确判断土体强度发生弱化后半圆堤整体稳定性问题,建立基于循环强度结合D-P屈服准则的拟静力有限元模型来分析半圆堤整体稳定性。分析荷载破坏包络线的变化趋势,给出提高半圆堤整体稳定性的工程建议。并在有限元数值分析结果基础上,对变量进行无量纲化,通过优化分析进行非线性拟合归一得出描述半圆堤整体稳定性的极限状态方程。以长江口深水航道治理二期工程为例,结果表明简化计算方法是可靠的,可供工程设计借鉴和使用。
The traditional circular sliding method is not able to calculate the integral stability of semi-circular breakwater structure with soil strength weakening.Pseudo-static FE model based on the concept of cyclic strength and considering DP yield criterion is established.Engineering advices are proposed to improve the integral stability of semi-circular breakwater by analyzing the trend of failure envelope.Based on the FE numerical results,a limit state equation is proposed by using dimensionless variable technique and Optimizing Analysis Software.The Yangtze estuary deepwater channel regulation phase II project is taken as the example,and the results show that the simplified calculation method is reliable and can be used in engineering design.
出处
《海洋工程》
CSCD
北大核心
2011年第1期116-121,共6页
The Ocean Engineering
基金
国家自然科学基金资助项目(50979069)
国家高技术研究发展(863)计划资助项目(2008AA09Z307)
关键词
半圆堤
整体稳定性
强度弱化
破坏包络线
循环荷载
semi-circular breakwater
integral stability
strength weakening
failure envelope
cyclic loading
