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基于大型结构分析软件ADINA,建立了考虑横缝的高拱坝非线性动力仿真模型。并以云南省牛栏江天花板碾压混凝土拱坝为例,从横缝的张开变化规律、坝体的应力分布等角度,研究了地震作用下拱坝横缝的非线性动力反应及对大坝抗震安全的影响。结果表明,横缝张开能释放大坝的拱向应力,降低坝体的动力响应,且横缝在地震过程中可能发生往复开合,但张开度均不大,对横缝止水材料不会产生破坏,大坝能承受设计地震考验。
Based on ADINA, a large-scale structure analysis software, a nonlinear dynamic simulation model of high arch dam considering lateral joint is established. Taking the Niulanjiang RCC arch dam as an example, this paper studies the nonlinear dynamic response of the arch dam joint under the action of earthquake and the influence of the large Impact of Dam Seismic Safety. The results show that the transverse joint can release the arch direction stress of the dam and reduce the dynamic response of the dam, and the transverse joint may reciprocate and open and close during the earthquake, but the opening degree is not large, so the transverse seal material will not be damaged , The dam can withstand the design earthquake test.