[1]李军,秦朝葵,马洪敬.城市高压燃气管道的结构可靠性分析[J].中国安全生产科学技术,2014,10(11):113-118.[doi:10.11731/j.issn.1673-193x.2014.11.019]
LI Jun,QIN Chao-kui,MA Hong-jing.Analysis on structural reliability of urban high-pressure gas pipeline[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(11):113-118.[doi:10.11731/j.issn.1673-193x.2014.11.019]
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城市高压燃气管道的结构可靠性分析
LI Jun,QIN Chao-kui,MA Hong-jing.Analysis on structural reliability of urban high-pressure gas pipeline[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(11):113-118.[doi:10.11731/j.issn.1673-193x.2014.11.019]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 10
- 期数:
- 2014年11期
- 页码:
- 113-118
- 栏目:
- 职业安全卫生管理与技术
- 出版日期:
- 2014-11-30
文章信息/Info
- Title:
- Analysis on structural reliability of urban high-pressure gas pipeline
- 分类号:
- X941
- 文献标志码:
- A
- 摘要:
- 埋地钢管的失效受多种因素影响，目前在城市燃气管道设计及在役管道安全性评估中，忽略了各因素的随机性而将其视为确定量。为分析各变量的不确定性对管道安全运行的影响，根据城市埋地燃气管道受力特点建立了管道失效力学模型，运用可靠性理论对模型中影响燃气管道失效的十三个参数进行了敏感性分析。结果表明：材料屈服强度、管道压力、竖直荷载、管道壁厚、管道弯曲系数、管道基座系数等六个随机参数最容易造成管道结构失效，而其余七个参数对管道失效的重要性均不超过1%；各随机参数均值和变异系数的相对变化对管道可靠性的影响不同，屈服强度、管道压力和管道壁厚三个参数的均值变化对可靠性影响最大，与管道壁厚变异系数相比，竖直荷载变异系数变化对可靠性的影响更大。
- Abstract:
- Various factors affect the safe operation of buried steel pipes, while at present their randomness are ignored and considered to be deterministic variables in the design of urban gas pipeline and safety assessment of in-service pipeline. To analyze the influence of their uncertainty on pipeline safe operation, the pipeline failure mechanical model was established according to the stress characteristics of urban buried gas pipeline. By applying reliability theory, the sensitivity of thirteen parameters influencing pipeline failure in the model were analyzed. The results showed that, the material yield strength, internal fluid pressure, vertical loading, wall thickness, bending-moment coefficient, and deflection coefficient are more inclined to cause the failure of pipeline, while the importance of all the other seven parameters are not exceed 1%. Moreover, the relative change of mean value and variation coefficient of different parameters have different effects on pipeline reliability. The changes in mean value of three parameters, including yield strength, internal fluid pressure and wall thickness are of most significant influence on reliability, while the change in variation coefficient of vertical load is more important than the variation coefficient of wall thickness.
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备注/Memo
- 备注/Memo:
- 天津市科技支撑计划重点项目（10ZCGYSF01700）
