石油机械
石油機械
석유궤계
China Petroleum Machinery
2015年
10期
112-115
,共4页
逆断层%埋地管道%管土相互作用%有限元%应变设计准则
逆斷層%埋地管道%管土相互作用%有限元%應變設計準則
역단층%매지관도%관토상호작용%유한원%응변설계준칙
reverse fault%buried pipeline%pipe-soil interaction%finite element%strain design criteria
埋地管道通过的逆断层是油气输送管道抗震设计中最困难的地段，这是因为在逆断层位移作用下管道压缩分量大，容易产生屈曲失效。鉴于此，以某逆断层作用下埋地管道为例，利用有限元软件ABAQUS进行了管土作用分析，并采用基于应变的准则进行管道校核。对于范围大、布置复杂的地段采用管单元，土壤采用弹簧单元来模拟，可以满足工程使用的精度要求。计算结果表明，该埋管发生了压缩塑性变形，但仍然处于安全状态。研究内容可为埋地管道设计提供参考。
埋地管道通過的逆斷層是油氣輸送管道抗震設計中最睏難的地段，這是因為在逆斷層位移作用下管道壓縮分量大，容易產生屈麯失效。鑒于此，以某逆斷層作用下埋地管道為例，利用有限元軟件ABAQUS進行瞭管土作用分析，併採用基于應變的準則進行管道校覈。對于範圍大、佈置複雜的地段採用管單元，土壤採用彈簧單元來模擬，可以滿足工程使用的精度要求。計算結果錶明，該埋管髮生瞭壓縮塑性變形，但仍然處于安全狀態。研究內容可為埋地管道設計提供參攷。
매지관도통과적역단층시유기수송관도항진설계중최곤난적지단，저시인위재역단층위이작용하관도압축분량대，용역산생굴곡실효。감우차，이모역단층작용하매지관도위례，이용유한원연건ABAQUS진행료관토작용분석，병채용기우응변적준칙진행관도교핵。대우범위대、포치복잡적지단채용관단원，토양채용탄황단원래모의，가이만족공정사용적정도요구。계산결과표명，해매관발생료압축소성변형，단잉연처우안전상태。연구내용가위매지관도설계제공삼고。
Buried pipeline under the action of reverse fault is the most difficult section for seismic design?Due to the effect of reverse fault displacement, the resulted large compression component of pipeline is prone to leading to buckling failure because of compression or bending?Given a buried pipeline in a reverse fault as an example, pipe soil interaction analysis has been conducted using the finite element software ABAQUS?Then, the pipeline has been checked according to a strain based criteria?For large?scale and complex layout area, pipe element with spring element for the soil could meet the accuracy requirements for engineering and has a high efficien?cy?Calculation results show that the buried pipe has a compression plastic deformation, but still in a safe state?The study could provide references for pipeline designers on buried pipeline analysis using finite element method.
