摘要
利用有限元软件ANSYS模拟高桩承台-土-上部结构在波浪和地震共同作用下的内力和变形,采用Morison方程计算波浪力,并对结构水平方向输入El-Centro波进行模拟,根据时程曲线分别选取初始状态和正负加速度最大状态对结构进行研究,研究了桩基础在波浪和地震共同作用下的位移、弯矩、剪力以及轴力的变化,并与地震单独作用下的结构动响应进行了对比分析。分析结果表明,在波浪和地震共同作用下,前排桩所受弯矩最大,同时,桩顶的受力最危险;桩顶轴力分布表现出角桩最大、中间桩最小的分布特征。当波浪力和地震力方向一致时,桩顶位移增大,桩身弯矩和桩顶剪力也随之增加;反之,当波浪力和地震力方向相反时,则桩顶位移减小,桩身弯矩和桩顶剪力也随之减小。
Finite element software was used to simulate the internal force and deformation of high-rise pile cap-soil-structure under the wave and earthquake action.Meanwhile,wave force was calculated by using Morison equation,and the mechanical behavior of structure was simulated by inputing horizontal El-Centro wave.Then,the initial state and the state of the largest positive and negative acceleration were selected to study the structure according to the time history curve,and the displacement,bending moment,shear and axial force changes of pile foundation under wave and earthquake action were discussed,which was compared and analyzed with the structural response under the action of earthquakes solely.The result shows that the moment of front row of piles is biggest,and the force of pile bolck is the most dangerous;the axial force of the corner piles is the largest,and one of the center piles is the smallest under the action of wave and earthquake.When the wave forces and seismic forces are in the same direction,the displacement,moment,and shear force of pile bolck will be increased,on the contrary,the displacement,moment,and shear force of pile bolck will be decreased.
出处
《土木建筑与环境工程》
CSCD
北大核心
2011年第6期7-12,58,共7页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金资助(51074140)
河北省建设厅项目(2010-221)
