摘要
为深入了解高桩码头结构体系在最不利工况下的被动桩特性及破坏机制,考虑桩土共同作用、地基土弹塑性性质、桩土界面接触不连续特性以及码头结构材料非线性,采用有限元方法研究了码头结构在最不利工况下的受力变形特性及塑性铰分布规律,一定程度上为施工设计提供参考.计算结果表明:岸坡变形导致码头结构内力分布明显地向海侧调整,从而引起靠岸侧桩基产生较大拉力,处于不利工作状态;靠岸侧边桩弯矩沿桩身呈先增大后减小的分布规律,其余桩体弯矩则均沿桩身呈逐渐增大的分布形式;桩顶与码头面板连接处因钢筋较先进入塑性状态而形成塑性铰,在工程设计中应予以重视.
For a deeper comprehension of passive pile characteristic and failure mechanism of piled wharf system under the worst operating condition, nonlinear numerical computation is conducted in the present work by developing elasto-plastic FE model. Furthermore, in the computational model, considering pile-soil interaction, elastoplasticity of subsoil, discontinuous contact behavior between piles and soil and material nonlinearity of wharf structure, internal force and deformation variations and plastic hinges distribution of wharf structure are analyzed. The numerical results show that under the action of slope deformation, internal forces of wharf structure adjust outward to make piles of coast side bearing major tension. And then, bending moment of side pile of coast side firstly increases and then decreases along pile, and that of the others all gradually increase with piles height. Additionally, rebars of joints between pile caps and faceplate firstly turn into plastic state to make these locations form plastic hinges, seriously considered in project design. Based on the computational results and theoretical analyses, several conclusion remarks are drawn, which can provide valuable and referable experience to some extent for related engineering practice and design.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2015年第10期1161-1166,共6页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金项目(50809009)
辽宁省教育厅一般项目(L2013305)
中央高校基本科研业务费专项资金项目(3132014326)
关键词
岸坡变形
高桩码头
最不利工况
被动桩
有限元
塑性铰
slope deformation
piled wharf
the worst operating condition
passive pile
finite element method
plastic hinges
