张其一

• 1:中国海洋大学工程学院
• 2:中国海洋大学山东省海洋工程重点实验室

摘要(Abstract)：

海洋工程中结构物除了受到自身重力作用外,往往还受到海风、海浪、海流等的作用,使得海床土体中的基础一般受到集中力、弯矩和扭矩的联合作用,这一受力状态称为结构物基础的复合加载模式。本文以复合加载模式下海床土体变形规律与失稳机理为研究对象,基于通用有限元分析软件Abaqus,采用数值计算方法,对海床土体的极限承载能力进行了详细的研究。结果表明,荷载分量大小与组合形式对海床失稳机理与极限承载能力具有较大影响,H-M荷载空间内破坏包络面具有非对称性。本文给出的土体失稳模式,能够较为合理地评估复合加载模式下海床土体的变形规律;给出的土体极限力矩荷载判别准则,能够较为合理地计算海床土体的极限力矩荷载。

关键词(KeyWords)： Abaqus;复合加载;变形规律;失稳机理;破坏包络面

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50909050);; 山东省自然科学基金项目(ZR2009FQ004)资助

作者(Author): 张其一

DOI: 10.16441/j.cnki.hdxb.2013.04.015

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