|Buckling analysis for super-long pile considering self-weight of pile
|中文关键词: 屈曲分析 超长桩 临界荷载 瑞利-里兹法 桩身自重
|英文关键词: buckling analysis super-long pile buckling load the method of Rayleigh-Ritz self-weight of pile
| Buckling analysis of super-long pile is an important subject. Due to the super-long pile’s large self-weight, the stability of the super-long pile has been greatly influenced. Most of the existing research only consider the influence of lateral resistance of soil on the buckling load, while the calculation of buckling load for long pile, with considering both factors of lateral resistance of soil and self-weight of pile has been rarely reported. In this paper, the influence of both factors have been taken into consideration. The analytical solutions for the buckling load and the calculation length of super-long pile are given by choosing the proper deflection function of pile, the elastic resistance model of lateral soil and the buckling load which is obtained with the method of Rayleigh-Ritz. Finally, this paper has analyzed the influences of lateral resistance of soil and the self-weight of pile on the buckling load and the calculation length of super-long pile. The result shows that the lateral resistance of soil mainly influences the buckling load. When the ratio of the depth to the length of pile (h/L) is at a low level, the influences of the self-weight of pile on the buckling load must be considered. With the increase in the value of this ratio, the influence of self-weight of pile gradually decreases to the yield load.