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以南水北调中线工程中河南省南阳段的PCCP为研究对象,建立了有限元动力分析模型,对其动力特性与地震动力响应进行了分析研究。分析了不同管道特性对PCCP动力响应的影响:不同的埋设深度、不同的管壁厚度等。结果表明,当埋深大于某一限值以后,结构的动应力与管道埋深关系不大;管道的最大轴向应力会随着管道壁厚的增加而减小,而最大弯曲应力变化很小。
Taking PCCP in Nanyang section of Henan province as a research object, a finite element dynamic analysis model was established and its dynamic characteristics and seismic dynamic response were analyzed. The influence of different pipe characteristics on the dynamic response of PCCP is analyzed: different embedment depth, different wall thickness and so on. The results show that when the depth is greater than a certain limit, the dynamic stress of the structure has little to do with the buried depth of the pipe. The maximum axial stress of the pipe decreases with the increase of the pipe wall thickness and the change of the maximum bending stress is small .