上海交通大学学报

上海交通大学学报 ›› 2012, Vol. 46 ›› Issue (05): 832-836.doi: 10.16183/j.cnki.jsjtu.2012.05.031

所属专题： 王建华教授学报发文专辑

• • 上一篇    

长钢顶管稳定特性的有限元分析

陈楠1(), 陈锦剑1, 夏小和1(), 王建华1, 钟俊彬2   

  1. 1.上海交通大学土木工程系，上海 　200240
    2.上海市政工程设计研究总院，上海 　200092
  • 收稿日期:2012-11-08 出版日期:2012-05-01 发布日期:2012-05-28
  • 作者简介:陈楠（1985-），男，河南安阳人，博士生，主要研究方向为市政顶管工程．E-mail: czmjsjcnn@yahoo.com.cn|夏小和（联系人），男，教授，博士生导师，电话（Tel.）:021-64363585, E-mail: xhxia@sjtu.edu.cn

FEM Analysis on the Buckling of a Long Steel Jacking Pipe

CHEN Nan1(), CHEN Jin-jian1, XIA Xiao-he1(), WANG Jian-hua1, ZHONG Jun-bin2   

  1. 1.Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China
    2.Shanghai Municipal Engineering Design institute (Group) Co. Ltd. , Shanghai 200092, China
  • Received:2012-11-08 Online:2012-05-01 Published:2012-05-28

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摘要：

随着钢顶管直径和顶进距离的不断增大，复杂受力条件下的钢顶管屈曲破坏成为了施工过程中的工程隐患．通过简化长径比超过100的钢顶管受力模型，探讨了长钢顶管稳定特性有限元分析方法．首先进行钢顶管管道的特征值屈曲计算，得到管道的一阶屈曲模态．再将一阶模态作为初始缺陷引入到钢管，进行弹塑性屈曲极限分析．通过算例分析了钢顶管在各种基本荷载及不同组合荷载下的屈曲模态，并探讨了其弹塑性稳定极限荷载的变化规律．分析结果反映了钢顶管屈曲工程案例现象，并建议通过控制注浆效果和顶进措施来提高管道的稳定安全性，对于高围压下的钢顶管尤其需要注重顶力控制．

关键词: 钢顶管, 稳定, 有限元方法, 屈曲模态, RIKS法

Abstract:

The buckling of steel jacking-pipe under complex loads has been an important factor in construction because of the increasing of diameter and jacking distance. Numerical analysis on the buckling of long steel jacking pipe, whose distance-diameter ratio is larger than 100, is studied in this paper with finite element method (FEM). The first buckling mode of pipe-jacking under different loads are obtained by the buckle analysis. By introducing the first mode as the initial imperfection, the elastic-plastic buckling behavior of steel pipes is analyzed with the RIKS method. Both the buckling mode and ultimate load of buckling of the steel jacking pipe are discussed, and the buckling phenomenon in practice is verified. Parametric analysis shows that the stability of steel pipe can be improved by reducing friction and face resistance of pipe-jacking, and the jacking load of the pipes with high confining pressure should be carefully controlled.

Key words: steel pipe-jacking, buckling, finite element method, buckling mode, RIKS method

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