基于幂次强化的海底管道极限承载力  

Ultimate Loading Capacity of Offshore Pipeline Considering Power Strain Hardening Effect

作　　者：陈严飞[1] 张娟[2] 张宏[1] 郑伟[1] 曹静 

机构地区：[1]中国石油大学(北京),油气管道输送安全国家工程实验室,城市油气输配技术北京市重点实验室,北京102249 [2]中国电建集团北京勘测设计研究院有限公司,北京100024 [3]中海油研究总院,北京100024

出　　处：《中国造船》2015年第1期132-141,共10页Shipbuilding of China

基　　金：国家自然科学基金(51309236);教育部博士点基金(20120007120009);上海交通大学海洋工程国家重点实验室开放基金(1314);天津大学水利工程仿真与安全国家重点实验室开放基金(HESS-1411)

摘　　要：基于幂次强化模型,给出了内压和轴力作用下海底管道极限弯矩承载力计算方法,并给出了极限承载力理想弹塑性模型解析解,编制了海底管道极限承载力计算程序BCP。通过算例,研究了内压和轴力对幂次强化海底管道极限弯矩承载力的影响规律,并与试验结果进行了对比,验证了解析解的合理性,可以为海底管道的结构强度设计和安全评价提供参考。Based on power strain hardening assumption, analytical solutions of ultimate bending capacity of offshore pipeline are presented. Analytical solutions with elastic-perfectly plastic assumption are provided as well. The proposed methods are able to account for the combined actions of internal pressure, axial force and bending moment. Good agreement is observed when ultimate bending capacities obtained from analytical solutions are compared with experimental results. It is shown that strain hardening pipes yield higher bending capacity than that of pipe with elastic-perfectly plastic material, and the ignorance of strain hardening, as commonly assumed in current code, may underestimate the ultimate bending capacity of steel pipes. The solutions presented in this paper are applicable in the structural design and safety evaluation of offshore pipelines. 4

关 键 词：海底管道 极限承载力 理想弹塑性 幂次强化 解析解 

分 类 号：TE973[石油与天然气工程—石油机械设备]