作者：张立松1,2, 张士岩2, 闫相祯2, 曹宇光2
作者单位：1. 山东省油气储运安全省级重点实验室青岛市环海油气储运技术重点实验室, 山东 青岛 266580;
2. 中国石油大学(华东)储运与建筑工程学院, 山东 青岛 266580
关键词：输气管道;地震断层;土体力学性质;等效边界弹簧;壳-接触模型
摘要：
为获取土体力学性质对输气管道应变行为的影响，给出等效边界弹簧设置在管道弹塑性变形段的本构关系，并据此建立考虑等效边界弹簧的输气管道穿越地震断层壳-接触有限元模型。利用该有限元模型，分析地震断层作用下土体力学性质对输气管道受拉侧和受压侧最大轴向应变的影响规律。结果表明：在较小的断层位移下，土体弹性模量和内摩擦角对最大轴向应变有较大影响；随着断层位移的增大，土体弹性模量和内摩擦角对最大轴向应变的影响降低。无论较小断层位移还是较大断层位移，土体内聚力对输气管道最大轴向应变的影响均较小。
Effects of soil properties on gas pipelines crossing faults
ZHANG Lisong1,2, ZHANG Shiyan2, YAN Xiangzhen2, CAO Yuguang2
1. Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety, Qingdao Key Laboratory of Circle Sea Oil & Gas Storage and Transportation Technology, Qingdao 266580, China;
2. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, China
Abstract: To analyze the influence of the soil properties on the strain response of the pipeline, the constitutive relation of the equivalent boundary spring acting on the segment where the pipeline yielding occurs was derived. Considering the equivalent boundary spring, the shell-contact finite element model of the pipeline crossing faults was established. Using the finite element model, the effect of the soil properties on the maximum axial strain on the tensile and compressive sides of the pipeline was investigated. The results show that the elastic modulus and internal friction angle of the soil have obvious effects on the maximum axial strain under smaller fault displacements. However, with the increase of the fault displacement, the effect of the elastic modulus and internal friction angle of the soil decreases significantly. Despite the degree of the fault displacement, the effect of the cohesion of the soil on the maximum axial strain is very low.
Keywords: gas pipeline;eathquake fault;soil mechanical property;equivalent boundary spring;shell-contact model
2017, 43(5): 120-123 收稿日期: 2016-08-20;收到修改稿日期: 2016-11-10
基金项目: 国家自然科学基金（11472309）；CNPC重点实验室课题（2014A-4214）
作者简介: 张立松(1982-),男,山东潍坊市人,副教授,博士,研究方向为油气管道强度及稳定性。
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