非一致激励下地下管线振动台试验研究

发布时间：2018-08-02 21:27

【摘要】：用于输水、输气及输油等长大地下管线在地震中易发生破坏,且对灾后紧急救援、能源输送等救灾和重建工作影响极大。对于诱发地下长大管线破坏的因素而言,非一致场地波动是最重要的因素之一,如今这一问题已引发众多研究,但受试验设备限制,少有研究者开展非一致激励下管线响应的试验研究。针对长大地下管线受地震波的影响效应,利用独立控制的双台面大型振动台试验设备研究了三维非一致地震激励作用下地下管线的响应,探讨了管线的加速度、应变以及位移等参数的变化规律。试验结果表明:深埋地下管线的存在对管线周围土体和地表的地震响应影响程度不同;在一致和非一致地震激励下,管线的弯曲应变峰值区别较大;规范设计时弱化甚至忽略管线弯曲应变,这种做法难以解释管线弯折破坏。
[Abstract]:The underground pipelines, which are used for water transportation, gas transmission and oil transportation, are easily damaged in the earthquake, and have great influence on emergency rescue and energy transportation, such as disaster relief and reconstruction. For the factors inducing the destruction of underground pipeline, the unconsistent site fluctuation is one of the most important factors. Test equipment is limited and few researchers carry out experimental research on the response of pipeline under non uniform excitation. In view of the effect of seismic waves on large underground pipelines, the response of underground pipe line under three dimensional incoherent earthquake excitation is studied by using independent controlled double deck large vibration table test equipment, and the acceleration and strain of pipeline are discussed. The test results show that the existence of deep buried underground pipelines has different influence on the seismic response of soil and surface around the pipeline, and the peak bending strain peak of the pipeline is very different under the uniform and non uniform earthquake excitation, and it is difficult to explain the failure of pipeline bending strain when the standard design is designed. This method is difficult to explain. Pipe bending failure.
【作者单位】：西南交通大学土木工程学院;海南大学土木建筑工程学院;四川省建筑科学研究院;
【基金】：国防基础科研计划(No.B0220133003)~~
【分类号】：TU990.3

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