【摘要】 生命线工程系统中主干供气管网中存在着大量的焊接钢管,其在地震激励下的破坏以强度破坏为主。本文首先采用弹性地基梁原理和余弦正交展开方法,给出了管线在地震激励下应力的级数解。然后根据规范给出了供气管线在地震作用下的极限状态方程,并采用验算点法得到其可靠度。本文以沈阳市主干供气管线的抗震可靠性分析为例,介绍了本文方法在工程中的应用情况。更多还原

【Abstract】 The damage of welded pipelines which largely exist in main gas pipeline system are owing to high stress subject to earthquake.On the basis of elastic foundation-beam method,orthogonal cosine expansion method is used to calculate the seismic response of pipelines.Limit state equation is presented for the welded pipeline according to code and FOSM method is used to obtain aseismic reliability of welded pipeline.As an example,the methods are applied to Shenyang City’s main gas pipelines.更多还原