下穿路堤管道力学性状分析
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摘要
下穿路堤管道在上部覆土荷载、路堤堆载、自重荷载等各类荷载的作用下,容易产生拉裂、屈曲等破坏,造成重大经济损失.本文应用ABAQUS有限元软件对长距离输气管道在路堤荷载作用下的力学性状进行分析,探讨了管道埋深、路堤高度、路堤宽度、土体弹性模量和土体压缩层厚度等参数对管道受力性能的影响.研究表明路堤下方管道沿长度方向各截面最大应力、最大应变和竖向位移以路堤中线为轴对称分布.与远离路堤管道段相比,路堤宽度范围内的管道受力有较显著变化,其值与该点距离路堤中线距离成线性反比例增长,在路堤中线正下方达到最大值.管道浅埋情况下不同埋深对管道的力学性状影响不大.路堤高度的增大、路堤宽度的减小会使管道的最大应力、最大应变增加.土体弹性模量的减小、土体压缩层厚度的增大也会使管道的最大应力、最大应变和位移增加.
Subjected to the loads of upside soil,embankment,dead-weight and other loads,the pipeline undercrossing embankment is prone to be cracked by tension and buckled by pressure,which will bring serious economic damages.In this paper,the finite element program ABAQUS was adopted to analyze the mechanical behavior of long-distance gas pipeline with embankment load.The effect of parameters such as the buried depth of pipeline,the height and width of embankment,the elastic modulus of soil and the thickness of soil compression layer on behavior of pipeline was investigated.Numerical results show that the stress,strain and vertical displacement of pipeline is axisymmetrically distributed taking the center line of embankment as an axis.Compared to that far from embankment,the behavior of pipeline just below embankment has a significant change.The values increase linearly with the decrease of distance to center of embankment and is maximum at the center of pipeline just below the embankment.The buried depth of pipeline has a little effect on the mechanical properties of pipeline when pipeline is shallowly buried.The increase of the height and the decrease of the width of pipeline will make the stress,strain and vertical displacement of pipeline increase.Also,the decrease of the elastic modulus of soil and the increase of soil compression layer thickness will lead to the increase value.
Subjected to the loads of upside soil,embankment,dead-weight and other loads,the pipeline undercrossing embankment is prone to be cracked by tension and buckled by pressure,which will bring serious economic damages.In this paper,the finite element program ABAQUS was adopted to analyze the mechanical behavior of long-distance gas pipeline with embankment load.The effect of parameters such as the buried depth of pipeline,the height and width of embankment,the elastic modulus of soil and the thickness of soil compression layer on behavior of pipeline was investigated.Numerical results show that the stress,strain and vertical displacement of pipeline is axisymmetrically distributed taking the center line of embankment as an axis.Compared to that far from embankment,the behavior of pipeline just below embankment has a significant change.The values increase linearly with the decrease of distance to center of embankment and is maximum at the center of pipeline just below the embankment.The buried depth of pipeline has a little effect on the mechanical properties of pipeline when pipeline is shallowly buried.The increase of the height and the decrease of the width of pipeline will make the stress,strain and vertical displacement of pipeline increase.Also,the decrease of the elastic modulus of soil and the increase of soil compression layer thickness will lead to the increase value.
引文
[1]赵成刚,冯启民.生命线地震工程[M].北京:地震出版社,1994.
[2]张土乔,李洵,吴小刚.地基差异沉降时管道的纵向力学性状分析[J].中国农村水利水电,2003,(7):46-48.ZHANG Tu-qiao,LI Xun,WU Xiao-gang.Analysis of longitudinal mechanical properties for pipeline during foundation uneven settlement[J].China Rural Water and Hydropower,2003,(7):46-48.
[3]徐旭,姚满喜,常莹.复杂应力状态下埋地大口径管道沉降分析[J].上海大学学报(自然科学版),2011,17(2):189-195.XU Xu,YAO Man-xi,CHANG Ying.Analysis of disciplinarian of sedimentation about large caliber pipeline buried in complex stress state soil[J].Journal of Shanghai University(Natural Science Edition),2011,17(2):189-195.
[4]李镜培,丁士君.邻近建筑荷载对地下管线的影响分析[J].同济大学学报(自然科学版),2004,32(12):1553-1557.LI Jing-pei,DING Shi-jun.Influence of additional load caused by adjacent buildings on underground pipeline[J].Journal of Tongji University(Natural Science),2004,32(12):1553-1557.
[5]梁瑞,颜鹏飞,邵松伟,等.埋地管道在地震波作用下的动力响应分析[J].兰州理工大学学报,2008,34(6):148-150.LIANG Rui,YAN Peng-fei,SHAO Song-wei,et al.Analysis of dynamic response of buried pipelines to seismic wave[J].Journal of Lanzhou University of Technology,2008,34(6):148-150.
[6]王洪波,张学增,王鹏,等.冲击荷载作用下埋地管道基于应变的力学分析[J].石油工程建设,2009,35(5):1-4.WANG Hong-bo,ZHANG Xue-zeng,WANG Peng,et al.Mechanical analysis on strain based design of buried pipeline subject to impact load[J].Petroleum Engineering Construction,2009,35(5):1-4.
[7]王滨,李昕,周晶.地震断层作用下的埋地管道等效分析模型[J].防灾减灾工程学报,2009,29(1):44-50.WANG Bin,LI Xin,ZHOU Jing.An equivalent analytical model of buried pipelines subject to fault movement[J].Journal of Disaster Prevention and Mitigation Engineering,2009,29(1):44-50.
[8]JTG D20-2006.公路路线设计规范[S].北京:人民交通出版社,2006.
[9]杨俊涛.垂直荷载作用下埋地管道的纵向力学性状分析[D].杭州:浙江大学,2006.YANG Jun-tao.Research on Longitudinal Mechanical Characteristics of Pipelines Buried in Soft Soil under Vertical Loads[D].Hangzhou:Zhejiang University,2006.
[2]张土乔,李洵,吴小刚.地基差异沉降时管道的纵向力学性状分析[J].中国农村水利水电,2003,(7):46-48.ZHANG Tu-qiao,LI Xun,WU Xiao-gang.Analysis of longitudinal mechanical properties for pipeline during foundation uneven settlement[J].China Rural Water and Hydropower,2003,(7):46-48.
[3]徐旭,姚满喜,常莹.复杂应力状态下埋地大口径管道沉降分析[J].上海大学学报(自然科学版),2011,17(2):189-195.XU Xu,YAO Man-xi,CHANG Ying.Analysis of disciplinarian of sedimentation about large caliber pipeline buried in complex stress state soil[J].Journal of Shanghai University(Natural Science Edition),2011,17(2):189-195.
[4]李镜培,丁士君.邻近建筑荷载对地下管线的影响分析[J].同济大学学报(自然科学版),2004,32(12):1553-1557.LI Jing-pei,DING Shi-jun.Influence of additional load caused by adjacent buildings on underground pipeline[J].Journal of Tongji University(Natural Science),2004,32(12):1553-1557.
[5]梁瑞,颜鹏飞,邵松伟,等.埋地管道在地震波作用下的动力响应分析[J].兰州理工大学学报,2008,34(6):148-150.LIANG Rui,YAN Peng-fei,SHAO Song-wei,et al.Analysis of dynamic response of buried pipelines to seismic wave[J].Journal of Lanzhou University of Technology,2008,34(6):148-150.
[6]王洪波,张学增,王鹏,等.冲击荷载作用下埋地管道基于应变的力学分析[J].石油工程建设,2009,35(5):1-4.WANG Hong-bo,ZHANG Xue-zeng,WANG Peng,et al.Mechanical analysis on strain based design of buried pipeline subject to impact load[J].Petroleum Engineering Construction,2009,35(5):1-4.
[7]王滨,李昕,周晶.地震断层作用下的埋地管道等效分析模型[J].防灾减灾工程学报,2009,29(1):44-50.WANG Bin,LI Xin,ZHOU Jing.An equivalent analytical model of buried pipelines subject to fault movement[J].Journal of Disaster Prevention and Mitigation Engineering,2009,29(1):44-50.
[8]JTG D20-2006.公路路线设计规范[S].北京:人民交通出版社,2006.
[9]杨俊涛.垂直荷载作用下埋地管道的纵向力学性状分析[D].杭州:浙江大学,2006.YANG Jun-tao.Research on Longitudinal Mechanical Characteristics of Pipelines Buried in Soft Soil under Vertical Loads[D].Hangzhou:Zhejiang University,2006.
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