|本期目录/Table of Contents|

[1]韩传军,张瀚,张杰,等.地表载荷对硬岩区埋地管道应力应变影响分析[J].中国安全生产科学技术,2015,11(7):23-29.[doi:10.11731/j.issn.1673-193x.2015.07.004]
 HAN Chuan-jun,ZHANG Han,ZHANG Jie,et al.Analysis on influence of surface load to stress-strain characteristics of pipeline buried in hard rock region[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(7):23-29.[doi:10.11731/j.issn.1673-193x.2015.07.004]
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地表载荷对硬岩区埋地管道应力应变影响分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
11
期数:
2015年7期
页码:
23-29
栏目:
学术论著
出版日期:
2015-07-30

文章信息/Info

Title:
Analysis on influence of surface load to stress-strain characteristics of pipeline buried in hard rock region
作者:
韩传军1张瀚1张杰1李琦2
(1.西南石油大学机电工程学院,四川 成都610500; 2. 西南油气田输气管理处,四川 成都610213)
Author(s):
HAN Chuan-jun1 ZHANG Han1 ZHANG Jie1 LI Qi2
(1.School of Mechatronic Engineering, Southwest Petroleum University, Chengdu Sichuan 610500, China; 2. Gas Transmission Management Department, PetroChina Southwest Oil & Gasfield Company, Chengdu Sichuan 610213, China)
关键词:
埋地管道地表载荷数值仿真等效应力塑性应变
Keywords:
buried pipeline surface load numerical simulation equivalent stress plastic strain
分类号:
X937
DOI:
10.11731/j.issn.1673-193x.2015.07.004
文献标志码:
A
摘要:
为研究地表载荷对硬岩区埋地管道力学性能的影响,建立了管-土耦合三维数值模型,分析了地表载荷大小、作用面积、管道压力、管道径厚比及回填土弹性模量对管道应力分布、塑性应变、椭圆度的影响。结果表明:地表压载作用下,高应力区首先出现在管道顶部且呈椭圆形;随着地表载荷及其作用面积的增大,管道高应力区逐渐扩大,管道截面左右两侧也出现应力集中;随着回填土弹性模量、管道壁厚及内压的增加,管道顶部高应力区及最大等效应力均减小。塑性应变首先出现在管顶,且塑性区随地表载荷、载荷作用长度增加而增大,随回填土体弹性模量及管道壁厚增大而逐渐减小;当内压为0~4MPa时,管道塑性应变及塑性区随内压的增大而减小。管道椭圆度随回填土体弹性模量、管道内压、壁厚增加而逐渐减小,随地表压载增大而增大。
Abstract:
In order to study the influence of surface load on mechanical performance of pipeline buried in hard rock region, a pipeline-soil coupling 3D numerical model was built. The influences by magnitude of surface load, action area, inner pressure, radius-thickness ratio of pipeline and elasticity modulus of backfill soil on stress distribution, plastic strain and ovality of the pipeline were analyzed. The results showed that under the action of surface load, the high stress zone, which is oval, appears on the upside of the pipeline. With the increasing of surface load and force area, the high stress zone enlarges gradually, and the stress concentration appears on the left and right sides of the cross section in the pipeline. With the increasing of elasticity modulus of backfill soil, thickness and inner pressure of pipeline, the high stress zone shrinks, and the maximum equivalent stress decreases. The plastic strain zone appears on the upside of pipeline firstly, and it increases with the increasing of surface load and action length, but decreases with the increasing of elasticity modulus of backfill soil and thickness of pipeline. The plastic strain and plastic zone of pipeline decrease with the increasing of inner pressure when the inner pressure ranges from 0 to 4 MPa. The ovality of pipeline decreases with the increasing of elasticity modulus of backfill soil, thickness and inner pressure of pipeline, but increases when the surface load increases.

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备注/Memo

备注/Memo:
国家自然科学基金项目(51474180)
更新日期/Last Update: 2015-07-30