【作者】 朱文吉； 曾祥国； 姚安林； 陈华燕；

【Author】 ZHU Wen-ji~1,ZENG Xiang-guo~1,YAO An-lin~2,CHEN Hua-yan~1 (1.School of Architecture and Environment,Sichuan Univ.,Chengdu 610065,China; 2.School of Civil Eng.and Architecture,Southwest Petroleum Univ.,Chengdu 610500,China)

【机构】 四川大学建筑与环境学院； 西南石油大学建筑工程学院；

【摘要】 在腐蚀介质中,高压输气管道不可避免地会产生裂纹。确定爆炸作用下含裂纹埋地输气管道极限载荷对于管道优化设计、安全运营和降低危险系数具有十分重要的意义。建立了爆炸空腔、土壤和输气管道相互作用模型,并利用LS-DYNA软件,基于虚拟裂纹闭合技术(VCCT)计算了埋地输气管道的动态断裂参数。该模型为埋地管道在爆炸荷载作用下的风险评估提供了一个计算平台,其计算方法和结果对埋地输气管道的施工、设计和风险评估具有一定的参考价值。更多还原

【Abstract】 The generation of inner crack of buried gas pipeline is almost inevitable under the high pressure and corrosive medium.Determination of the limit load of buried gas pipeline with initial crack is significant for buried pipeline optimization design,safety operation and risk reduction.The interaction mode among explosion cavity,soil and buried gas pipeline was established,then the dynamic response was simulated by LS-DYNA software for buried gas pipeline with initial crack under blast loading and the virtual crack closure technique(VCCT) was used to calculate dynamic fracture parameters.This calculation model provided a computation platform for the risk assessment of buried gas pipelines during the mird-party interference.The calculative method and results are of value for the risk assessment,design and construction of buried gas pipeline.更多还原