|
|
Stress analysis and field testing of buried pipeline under traffic load |
LI Xin-liang1,LI Su-zhen1,2,SHEN Yong-gang3 |
1. Department of Building Engineering,Tongji University,Shanghai 200092,China; 2. State Key Laboratory of Disaster Research in Civil Engineering,Tongji University,Shanghai 200092,China;3. Department of Civil Engineering,Zhejiang University,Hangzhou 310058,China |
|
|
Abstract Mechanical condition of buried pipes under traffic load is significant for safety evaluation of pipeline network. The theoretical solutions of this mechanical issue were first carried out by following the three steps:Boussinesq solutions for additional soil pressure due to wheel weight;Winkler beam model for pipe longitudinal stress;Iowa formula for the hoop stress. The influences of various parameters on pipe stress were then investigated,including tire pressure,buried depth,wheel-pipe horizontal distance,stiffness ratio of pipe and soil,and modulus of soil reaction. Aiming to a water distribution pipe under a main road,field tests were conducted to measure its strain responses by using long-gage fiber bragg grating (FBG) sensors. The test results verify the accuracy of the theoretical methods and indicate that the peak values of axial strain responses of the pipe is not sensitive to the passing speed of the vehicle.
|
Published: 01 November 2014
|
|
交通荷载作用下埋地管道应力分析与现场测试
为研究交通荷载作用下管道结构的力学响应特性,应用线弹性力学理论,将车辆轴载下埋地管道的静力计算问题分解成3个部分依次求解:基于Boussinesq解答的管顶附加土压应力计算,基于Winkler弹性地基梁模型的管道纵向应力计算,基于Iowa公式的管道环向应力计算. 在此基础上探讨轮压、管道埋深、轮-管水平距离、管-土相对刚度、土壤阻力模数等参数对埋地管道力学性状的影响规律. 此外,应用光纤光栅传感器,对某供水管道在车载作用下的应变响应进行现场测试. 理论计算方法和测试结果对比分析表明:采用该传感器监测管道表面应变具有较高的精度和灵敏度;管顶轴向应变峰值对车速的不敏感;采用静力计算方法分析车辆荷载作用下埋地管道的应力问题具有合理性.
|
|
[1] WARMAN D J,HART J D,FRANCINI R B. Development of a pipeline surface loading screening process and assessment of surface load dispersing methods [R]. Calgary, Alber-ta:Canadian Energy Pipeline Association (CEPA),2009.
[2] 李素贞,李杰,赵鸣. 市政地下管道检测/监测技术现状调查[R]. 上海:同济大学土木工程学院生命线工程研究所,2009.
LI Su-zhen,LI Jie,ZHAO Ming. Investigati-on of the detection/monitoring technologies f-or city buried pipeline [R]. Shanghai:Institu-te of Lifeline Engineering in School of Civil Engineering,Tongji University,2009.
[3] GB50332-2002.给水排水工程管道结构设计规范 [S]. 北京:中国建筑工业出版社,2002.
GB50332-2002,Structural design code for pi-peline of water supply and waste water engi-neeering [S]. Beijing:China Architecture & Building Press,2002.
[4] MOSER A P,FOLKMAN S. Buried pipe d-esign [M]. 3rd ed. New York:McGraw-Hill Professional,2008:33-43.
[5] HU Yu-chan,ZHAO Ming,LI Su-zhen. pipe-line defect detection based on ultrasonic gui-ded wave technique using fiber bragg gratin-gs [C]∥ Proceedings of the International C-onference on Pipeline and Trenchless Tech-nology. Wuhan:American Society of Civil E-ngineers,2012:996-1010.
[6] 何存富,杭利军,吴斌. 分布式光纤传感技术在管道泄漏检测中的应用 [J]. 传感器与微系统,2006,25(9):8-14.
HE Cun-fu,HANG Li-jun,WU Bin. Applic-ation of distributed optical fiber sensing tech-nique in pipeline leak detection [J]. Transdu-cer and Microsystem Technologies,2006,25(9):8-14.
[7] 吴智深,杨千才,李素贞,等. 动静态分布传感技术及结构健康监测理论与设计体系 [C]∥结构防灾、监测与控制—第二届“结构工程新进展国际论坛”特邀报告集. 大连:中国建筑工业出版社,2008:200-252.
WU Zhi-shen,YANG Qian-cai,LI Su-zhen,et al. Dynamic and static distributed sensin-g technology with the theory and design syst-em of structural health monitoring [C]∥ Pro-ceedings of the 2nd International Conferen-ce on New Progress in Structural Enginee-ring—Structural Disaster Prevention,Moni-toring and Controlling. Dalian:China Arch-itecture & Building Press,2008:200-252.
[8] 徐芝纶. 弹性力学 [M]. 4版. 北京:高等教育出版社,2006:81-85.
[9] 龙驭球. 弹性地基梁的计算 [M]. 北京:高等教育出版社,1981:14-22.
[10] WATKINS R K,ANDERSON L R. Structur-al mechanics of buried pipes [M]. New Yo-rk:CRC Press,2000:Chapter 5 and Appen-dix B.
[11] HOWARD A K.Modulus of soil reaction(E′) values for buried flexible pipe [J]. Journal of the Geotechnical Engineering Division,1977,103:33-43.
[12] HOWARD A K.Composite E′ (modulus of soil reaction)[J]. Pipelines,2009:958-969.
[13] LI S Z,WU Z S. Development of distribut-ed long-gage fiber optic sensing system for structural health monitoring [J]. Structural Health Monitoring,2007,6:133-143. |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|