期刊文献+

纵横弯曲桩计算的综合刚度和双参数法的有限差分解 被引量:4

Finite difference solution based on composite stiffness and bi-parameter method for calculating vertical and horizontal bending piles
原文传递
导出
摘要 为提高外露段较长的桩在横向和竖向荷载共同作用下变形和内力的计算精度和效率,基于综合刚度原理和双参数法推导可考虑桩的纵横弯曲,即计及竖向荷载(包括桩顶竖向力及桩身自重和桩侧摩阻力)对弯曲变形影响的有限差分解,采用MATLAB程序语言编制相应的计算程序。与模型试验数据或现有方法工程实例计算结果的比较验证了该法的可靠性,同时还表明该方法比基于相同原理的杆系有限元法更方便快捷。研究结果表明:对于外露长度和桩顶竖向荷载较大的桩,重力二阶效应是不容忽视的,且竖向荷载不仅会增大桩身弯矩,还会导致桩身剪力的增大,现有方法未体现其对剪力的影响,是偏于不安全的,在纵横弯曲桩的设计计算中应引起重视。 To improve the accuracy and effectiveness in calculating the deformations and internal forces of piles with large exposure lengths under horizontal and vertical loads,a finite difference solution was established based on the composite stiffness principle and the bi-parameter method. A computation program was compiled by means of MATLAB. The reliability of this approach was verified through comparisons with the measured data from model tests or the calculated results of an engineering example with the existing methods. The comparisons showed that the approach was more convenient and faster than the link finite element method based on the same principle. It was also showed that,for piles with large exposure lengths under vertical loads,the gravity second-order effect must not be ignored and the vertical loads increased not only the bending moments of piles but also the shear forces. The influence of vertical loads on shear forces was not reflected in the current methods,which tended to be unsafe and should be noted in design calculations of vertical and horizontal bending piles.
出处 《岩石力学与工程学报》 EI CAS CSCD 北大核心 2016年第3期613-622,共10页 Chinese Journal of Rock Mechanics and Engineering
关键词 桩基工程 纵横弯曲桩 综合刚度原理 双参数法 变形和内力 有限差分法 pile foundations vertical and horizontal bending pile composite stiffness principle bi-parameter method deformation and internal force finite difference method
  • 相关文献

参考文献21

  • 1DAS Y C, SARGAND S M. Forced vibrations of laterally loaded piles[J]. International Journal of Solids and Sa'uctures, 1999, 36(33): 4 975 - 4 989.
  • 2CHEN C Y. Numerical analysis of slope stabilization concepts usingpiles[R]. Los Angeles California: University o f Southern California, 2001.
  • 3朱碧堂,杨敏.基坑支护结构弹塑性计算方法与m法的对比分析[J].岩土工程学报,2006,28(B11):1387-1394. 被引量:10
  • 4戴自航,陈林靖.多层地基中水平荷载桩计算m法的两种数值解[J].岩土工程学报,2007,29(5):690-696. 被引量:51
  • 5戴自航,沈蒲生,张建伟.水平梯形分布荷载桩双参数法的数值解[J].岩石力学与工程学报,2004,23(15):2632-2638. 被引量:22
  • 6戴自航,苏美选,胡昌斌.抛物线分布荷载推力桩双参数法的2种数值解[J].岩石力学与工程学报,2007,26(7):1463-1469. 被引量:11
  • 7REESE L C, WELCH I L C. Lateral loading of deep foundations in stiff clay[J]. Journal of the Geotechnical Engineering Division ASCE, 1975, 101(6T7): 633-649.
  • 8SASTRY V V R N, MEYERHOF G (2 Behaviour of flexible piles under inclined Loads[J]. Canadian Geotechnical Journal, 1990, 27(1 ).. 19 - 28.
  • 9MEYERHOF G G, YALCIN A S. Behaviour of flexible batter piles under inclined loads in layered soil[J]. Canadian Geotechnical Journal 1993, 30(2): 247-256.
  • 10SASTRY V V R N, MEYERHOF G G. Behaviour of flexible piles in layered sands under eccentric and inclined loads[J]. Canadian Geotechnical Journal, 1994, 31(4): 513-520.

二级参考文献73

共引文献187

同被引文献46

引证文献4

二级引证文献10

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部