岩土力学2017，Vol.38Issue(9)：2662-2668,2675,8.DOI:10.16285/j.rsm.2017.09.025
考虑斜坡效应的基桩屈曲临界荷载分析
Analysis of critical buckling loads of piles considering slope effect
摘要
Abstract
A model test for piles located in steep slopes has been conducted based on similarity theory.The transfer of axial loading,and the identification of critical buckling load have been investigated.The theory calculation formula and the fitting formula of critical buckling loads were obtained.The results show that there is no obvious inflection in the relationship between load and displacement.The buckling failure mode is thus dominant.Further,larger vertical and horizontal displacements of the pile top is observed in long piles.The critical buckling load simultaneously depends on the vertical and horizontal displacements of the pile top.In addition,the larger inclination the slope or the longer the free section of the pile result in smaller critical buckling load,and smaller vertical bearing reduction coefficient..The comparisons shows that the result from the theoretical calculation and the fitting formula both agree with the result of model tests,and the maximum error is less than 10％.The rationality of the model tests,the calculation theory and the fitting formula is verified.These can provide references for the practical engineering design.关键词
斜坡基桩/屈曲/模型试验/临界荷载/斜坡效应Key words
in-slope pile/buckling/model test/critical load/slope effect分类
建筑与水利引用本文复制引用
尹平保,杨莹,贺炜,刘新喜,赵衡..考虑斜坡效应的基桩屈曲临界荷载分析[J].岩土力学,2017,38(9):2662-2668,2675,8.基金项目
国家自然科学基金资助项目(No.51408066,No.51478051,No.51378082) （No.51408066,No.51478051,No.51378082）
湖南省教育厅优秀青年项目(No.16B013) （No.16B013）
长沙理工大学土木工程优势特色重点学科创新性项目(No.16ZDXK02).This work was supported by the National Natural Science Foundation of China (51408066,51478051,51378082) （No.16ZDXK02）
Outstanding Young Projects of Hunan Provincial Education Department (16B013) and Innovative Projects of Key Discipline in Civil Engineering of Changsha University of Science & Technolog (16ZDXK02). （16B013）
