Strain Based Design for Buried Steel Pipelines

埋地钢质管道基于应变的设计

• 批准号: RGPIN-2017-06606
• 负责人: Cheng, JungJune
• 金额: $ 1.53万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636137
• 关键词: Strain; Based; Design; Buried; Steel

Pipelines are one of the most economical modes of transportation for oil and gas from the location of the resources to the market. They are a key factor influencing the Canadian energy industry and overall economy. Energy pipelines are designed to transport pressurized highly flammable substances over a long distance, therefore, safety of the pipelines is paramount throughout the life of the infrastructure. To minimize the environmental and temperature effects, most of pipelines in Canada are buried underground. During the operation, pipelines are normally sustained a combination of circumferential stresses due to the internal pressure and longitudinal stresses induced by external loads/deformations. These external loads/deformations are primarily the result of soil movement and temperature effects. The stress design method is normally used to design these complex combined loading conditions. However, due to the complex nature of each ultimate limit state of a buried pipeline under internal and external loads/deformations, the stress design method is unable to address the needs of pipeline design, maintenance and operation.

管道是将石油和天然气从资源位置运输到市场的最经济的方式之一。它们是影响加拿大能源工业和整体经济的关键因素。能源管道的设计目的是长距离输送加压的高度易燃物质，因此，管道的安全性在基础设施的整个生命周期中至关重要。为了尽量减少环境和温度的影响，加拿大的大部分管道都埋在地下。在运行过程中，管道通常承受由内部压力引起的周向应力和由外部载荷/变形引起的纵向应力的组合。这些外部载荷/变形主要是土壤移动和温度效应的结果。 应力设计方法通常用于设计这些复杂的组合载荷条件。然而，由于埋地管道在内部和外部载荷/变形下的每个极限状态的复杂性，应力设计方法无法满足管道设计、维护和运行的需要。