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首页> 外文会议>Pipeline Division Specialty Conference; 20050821-24; Houston,TX(US) >Reliability Assessment of Distressed Prestressed Concrete Cylinder Pipe
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Reliability Assessment of Distressed Prestressed Concrete Cylinder Pipe

机译：预应力混凝土圆筒管的可靠性评估

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摘要

Reliability of a pipeline with distressed prestressed concrete cylinder pipe (PCCP) was assessed by structural analysis. The objective of the structural analysis was to evaluate serviceability and strength of the pipe, assuming loss of prestress in the core concrete due to wire fracture and corrosion. The study included analyses to evaluate the capacity of the pipe core to continue to resist internal pressure, external soil loads, and live loads through arch action, utilizing passive lateral soil pressure to provide support for strength and stability. Phased soil/structure interaction analyses and stability analyses were conducted to estimate probable overload factors (safety factors) present in the distressed pipe to resist internal and external loads. Overload factors were calculated at load levels corresponding to core cracking, cylinder yielding, and core crushing.
机译：通过结构分析评估了带有预应力混凝土圆柱管（PCCP）的管道的可靠性。结构分析的目的是评估管道的可使用性和强度，假设由于钢丝断裂和腐蚀而使核心混凝土中的预应力损失。这项研究包括分析，以评估管芯通过拱作用继续抵抗内部压力，外部土壤载荷和活荷载的能力，利用被动的横向土壤压力为强度和稳定性提供支持。进行了阶段性的土壤/结构相互作用分析和稳定性分析，以评估在受压管道中存在的抵抗内部和外部载荷的可能的过载系数（安全系数）。在与岩心开裂，汽缸屈服和岩心破碎相对应的载荷水平下计算了过载系数。

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