地震断层作用对地下输油(气)管道破坏的分析  

A STUDY OF BURIED PIPELINE DAMAGES CAUSED BY EARTHQUAKE FAULTING

作　　者：张素灵[1] 许建东[1] 曹华明 王春华[3] 

机构地区：[1]中国地震局地质研究所,北京100029 [2]克拉玛依石油化工厂,克拉玛依834003 [3]中国地震局,北京100036

出　　处：《地震地质》2001年第3期432-438,共7页Seismology and Geology

基　　金：中国地震局地质研究所论著2001B0028

摘　　要：系统地回顾和分析了 1975年至今国内外关于在地震断层作用下埋地管道反应的研究结果 ,简述了其中几种有代表性的研究方法 ,并重点论述了这些分析方法使用的计算模型及由此得到的不同结论。由变形协调条件确定大变形段的长度 ,并采用了大变形段的应力 -应变模型 ,对断层错距较大的情况也能提供精确的计算结果。通过实例计算表明 ,该方法物理概念明确、结果简单而又能保证计算精度 ,易于推广应用。基于前面的分析结果提出了相应建议 ,供设计与施工部门参考。This paper reviews the most popular studies since 1975 on the responses of buried pipeline to earthquake faulting. Among the analysis methods based on beam model, Newmark-Hall's model and Kennedy's model are most representative. Newmark-Hall's model is commonly accepted in engineering fields and adopted in China (SYJ8401-91,1991) and USA (Guidelines for Seismic Design of Oil and Gas Pipeline System, 1984) for its simplicity. Kennedy's model is relatively more precise and closer to the reality. As compared to the second model, the first model gains smaller calculating result due to the neglecting of transverse forces of the soil and bending deformation of the pipe. On the other hand, the result of the second model is conservative due to overestimating the elongation of the pipe. Recently, Wang Ruliang et al. proposed two representative numerical methods that were used to compute the deformation and internal forces of the pipes and to gain more realistic results. On the basis of previous work, a new analytical method of buried pipelines based on beam theory is proposed in this paper. The major characteristics of this method are: 1) The deformation model takes the form of elastic base beam in the far end and cantilever beam at the end closer to the fault (e.g. Wang Ru-Liang's method); 2) Ramberg-Osgood stress-strain model, which describes the pipe more realistic than the formerly used stress-strain model, is used and nonlinear feature of the pipe is considered; 3) Simplify the complex steps of determining whether the material yields in Wang Ru-Liang method of 1998 when calculating axial elongation of the pipe;4) The adoption of stress-strain model for large deformation improves the precision in the case of faulting with large deformation; 5) The influences of bending rigidity and extension rigidity are considered simultaneously so that the analytical formula of internal forces and deformation in any sections can be obtained. Some improvements have been made in our model on the basis of the previous wor

关 键 词：地震断层 埋地管道 抗震设计 地下输油管道 应力-应变模型 

分 类 号：U177.8[交通运输工程] TE973[石油与天然气工程—石油机械设备]