摘要
以锥形桩为例,用能量法对变截面桩的屈曲问题进行了深入研究.首先建立了锥形桩的力学分析模型,并通过选取适合于边界条件的桩的合理挠曲位移函数,导出了系统总势能的表达式;然后利用最小势能原理推导了锥形桩屈曲临界荷载的计算公式.大量计算表明,在其他条件相同的情形下,变截面桩较普通等截面桩稳定性好,且锥形变截面桩存在一最不利桩长,在设计桩长时,应避开此最不利值.
With the example of taped pile, the buckling problem of variable section piles was analyzed with the energy method. Firstly, the mechanical model of the taped pile was established, proper pile deflection function satisfying the boundary condition was chosen to deduce the total static energy of the system; and the formula of the buckling load was derived with the minimum potential energy principle. Numerical calculations indicated that the stability of the variable section pile was better than that of the constant section pile under similar conditions, and there existed a most disadvantageous pile length of taped pile. This value should not be selected in designing.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第3期55-58,共4页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金项目(No.50378036)
教育部高等学校博士学科点专项基金项目(No.20020532008)
关键词
屈曲
变截面桩
屈曲临界荷载
能量法
buckling
variable section pile
buckling critical load
energy method
