地下管线跨越断层地震反应拟静力研究

Pseudo-static study on earthquake response of buried pipeline crossing active fault

对于跨越活动断层埋地管线地震反应问题,根据实际管线埋设情况,采用有限元实体简化模型,并在管段有效计算长度范围内设置弹性支座,对管土体系施加等效位移荷载,利用拟静力方法对断层运动引起的管线地震反应进行了计算,通过分析,考察了断层位错量,跨越角度,贯通裂缝宽度和径厚比等因素对管线地震反应结果的影响,得出了管线地震反应的一般运动规律,同时认为适当地设置弹性支座有利于管线有效抵抗断层运动造成的破坏作用.

In this paper, the problem of earthquake response of buried pipeline when crossing active fault is considered. Based on the real condition of burying pipeline, simplified finite element method is used to build numerical model, with setting elastic supports at the range of effective length of the calculation and put equivalent displacement load on the pipesoil system, pseudo-static method is adopted to analyze the earthquake response of buried pipeline. The influence of sensitive factors such as displacement of active fault, crossing angle, width of cranny and ratio of diameter and thickness on the result of earthquake response of buried pipeline is researched, and the common law of earthquake response of buried pipeline is summarized, the conclusions indicates that setting elastic supports properly is a kind of measure which can benefit buried pipeline resist the movement of active fault.