依据建立的双槽渡槽薄壁结构动力分析模型,利用非线性接触单元Kelvin模型,开展了纵向地震波输入下的非线性碰撞响应分析.采用不同场地条件和不同峰值调幅的地震波输入,计算分析了南水北调老张庄双槽渡槽结构纵向碰撞地震反应.计算结果表明,伸缩缝间距大小对跨间碰撞效应影响很大；同时结构碰撞响应对输入地震波具有较强的频谱敏感性；计算中是否发生跨间碰撞对结构地震反应影响较大,说明了开展大型渡槽结构非线性碰撞地震响应分析是很有必要的.%In this paper, according to dynamic model of double-channel aqueduct, the longitudinal nonlinear pounding analysis under earthquake response is developed with Kelvin pounding model. The seismic waves with various site conditions and various peak accelerations are selected, and the longitudinal seismic pounding response of the aqueduct for the project of diverting water from south to north is studied. The calculation result shows that the clearance of expansion joint affects the pounding response a lot. The pounding response is sensitivity to the frequency spectrum of input waves. Comparing the pounding responses and non pounding responses under earthquake, the results are different obviously. It is necessary to study the nonlinear seismic pounding response of large-scale aqueduct.
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