跨断层隔震管道分析

埋地管道在断层错动作用下的内力分析及其抗震措施一直是生命线工程的一个重要问题与研究热点。对地下管道在断层错位下的响应计算,取得的成果较多,比较经典的有Newmark-Hall方法和Kennedy方法。后来又出现基于壳模型的简化方法,如高田至郎提出的简化计算方法等。相对来讲,关于管道抗震措施的研究成果较少。本文提出一种抗震措施,进行了基于壳模型的有限元动力数值模拟,并与4种松到中密场地土条件下的埋地管道断层错位响应进行对比分析。计算结果表明,本方法中三种长度管道的最大轴向拉应变远小于埋地管道的最大轴向拉应变,而且最大轴向压应变亦不大。

Analysis of seismic isolation pipelines across fault

The force analysis and seismic measures of buried pipelines crossing fault are important problems and hot spot of lifeline engineering.There is considerable progress in pipe response calculation due to faulting.The classic methods include Newmark-Hall method and Kennedy method and the simplified methods based on shell model finite element include Takada-Hassani method etc.Faulting-resistant means for buried pipelines is less relatively.The axial strain is compared with responses of buried pipelines in four different site conditions of loose to middle density.Calculation results show that the maximum axial tensile strain resuling from this method is much smaller than those of buried pipelines.And the maximum axial compressive strain is also not large.