波浪荷载作用下斜向抗拔桩的承载特性分析

›› 2012, Vol. 33 ›› Issue (1): 301-306.

波浪荷载作用下斜向抗拔桩的承载特性分析

范书立¹，陈健云¹，张俊清²

1. 大连理工大学海岸和近海工程国家重点实验室，辽宁大连 116024；2. 大连理工大学土木建筑设计研究院，辽宁大连 116024

收稿日期:2010-10-23 出版日期:2012-01-10 发布日期:2012-01-17
作者简介:范书立，男，1978年生，博士，讲师，主要从事工程结构抗震分析和结构防灾减灾方面的研究工作。
基金资助:
国家自然科学基金资助项目(No. 51179026)。

Research on bearing capacity of inclined uplift pile under wave cyclic loading

FAN Shu-li¹，CHEN Jian-yun¹，ZHANG Jun-qing²

1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China; 2. The Design Institute of Civil Engineering & Architecture, Dalian University of Technology, Dalian, Liaoning 116024, China

Received:2010-10-23 Online:2012-01-10 Published:2012-01-17

摘要/Abstract

摘要： 针对浮式海洋结构采用的桩基础，考虑土的循环软化效应，将软土的循环强度与Mohr-Coulomb屈服准则相结合，基于拟静力弹塑性分析建立了循环波浪载荷作用下斜向抗拔桩循环承载性能的计算模型，确定了斜向上载荷作用下抗拔桩的循环承载力，并与单调加载作用下的斜向抗拔桩的极限承载力进行了对比，进一步探讨了桩长、桩径、桩体模量及载荷循环次数等因素对斜向抗拔桩循环承载力的影响。研究结果表明：循环波浪荷载的作用导致了斜向抗拔桩土体循环强度的分布不均匀，从而降低了地基的循环承载力。斜向抗拔桩的动态极限承载力随循环次数的增加而降低，随桩长、桩径及桩体模量的增大而增大。

关键词: 海洋工程, 波浪循环荷载, 循环强度, 循环承载力, 桩基础

Abstract: Accompanying the development of ocean engineering, research on the bearing capacity of pile foundation under the action of wave cyclic loading has been given special attention for the design of offshore structures. Based on the concept of cyclic-softening effect, cyclic strength of the soft soil and Mohr-Coulomb yield criterion are combined together to numerically evaluate cyclic bearing capacity of inclined uplift pile under wave cyclic loading. A perfect elastoplastic finite element method for numerical assessment of bearing capacity of inclined uplift pile is developed. Dynamic ultimate bearing capacity of inclined uplift pile under cyclic loading is studied. The influences of load cycle times, static stress ratio, pile length, pile diameter and pile modulus on the cyclic ultimate bearing capacity of inclined uplift pile are analyzed. It can be concluded that the bearing capacity of the foundation under cyclic loading is less than that of under static load. The effects of wave cyclic loading lead to nonuniform distribution of cyclic strength of soil beside the inclined uplift pile and reduce the cyclic bearing capacity of pile foundation. The results also show that the ultimate bearing capacities of inclined uplift pile improve gradually with the increase of the load inclination, pile length, pile diameter, pile modulus, soil cohesion and soil modulus.

Key words: ocean engineering, wave cyclic loading, cyclic strength, cyclic bearing capacity, pile foundation

中图分类号:

TU 473.1+1

范书立，陈健云，张俊清. 波浪荷载作用下斜向抗拔桩的承载特性分析[J]. , 2012, 33(1): 301-306.

FAN Shu-li ，CHEN Jian-yun ，ZHANG Jun-qing. Research on bearing capacity of inclined uplift pile under wave cyclic loading[J]. , 2012, 33(1): 301-306.

参考文献

相关文章 15

[1]	高广运, 谢伟, 陈娟, 赵宏, . 高铁运行引起的高架桥群桩基础地面振动衰减分析[J]. 岩土力学, 2019, 40(8): 3197-3206.
[2]	李书兆, 王忠畅, 贾旭, 贺林林, . 软黏土中张紧式吸力锚循环承载力简化计算方法[J]. 岩土力学, 2019, 40(5): 1704-1712.
[3]	吴小锋, 朱斌, 汪玉冰, . 水平环境荷载与地震动联合作用下的海上风机单桩基础动力响应模型试验[J]. 岩土力学, 2019, 40(10): 3937-3944.
[4]	赵明华，陈耀浩，杨超炜，肖尧. 基于有限杆单元法的陡坡基桩非线性分析[J]. , 2018, 39(8): 3020-3028.
[5]	喻豪俊，彭社琴，赵其华,. 碎石土斜坡水平受荷桩承载特性研究[J]. , 2018, 39(7): 2537-2545.
[6]	刘红军，杨奇，. 局部冲刷对风机支撑系统承载性能的影响[J]. , 2018, 39(2): 722-727.
[7]	赵明华，朱志仁，黄明华，杨超炜，徐卓君. 考虑基桩嵌岩段侧阻的岩溶区顶板安全厚度计算[J]. , 2018, 39(11): 4201-4209.
[8]	荣雪宁，徐日庆，冯苏阳，仇涛，. 基于拉格朗日乘数法的大弯矩水平受荷桩研究[J]. , 2017, 38(9): 2605-2612.
[9]	周正龙，陈国兴，吴琪. 初始剪应力对饱和粉土液化大变形特性的影响[J]. , 2017, 38(5): 1314-1320.
[10]	冯君，张俊云，朱明，江南,. 软土地层高承台桥梁群桩基础横向承载特性研究[J]. , 2016, 37(S2): 94-104.
[11]	柏华军. 考虑溶洞顶板自重时桩端持力岩层安全厚度计算方法[J]. , 2016, 37(10): 2945-2952.
[12]	宇德忠，程培峰，季成，崔志刚,. 高纬度低海拔岛状多年冻土桩基回冻前后承载力的试验研究[J]. , 2015, 36(S2): 478-484.
[13]	单华峰，夏唐代，胡军华，俞峰，仇浩淼 ,　. 既有建筑物地下室增层开挖桩基屈曲稳定研究[J]. , 2015, 36(S2): 507-512.
[14]	靳军伟，杨敏，邓友生，刘晨晖 , . 砂土中隧道开挖对邻近桩基竖向影响的简化计算方法[J]. , 2015, 36(S1): 241-246.
[15]	苟尧泊，俞峰，杨予. 基坑开挖引起既有桩基侧摩阻力中性点位置分析[J]. , 2015, 36(9): 2681-2687.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed