【摘要】 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。更多还原

【Abstract】 Based on the large-scale structure analysis software ADINA,nonlinear dynamic simulation model of high arch dam is established with considering the transverse joints.Taking Tianhuaban RCC arch dam in Niulanjiang River of Yunnan Province for an example,the nonlinear dynamic response of transverse joints and its effect on anti-seismic safety of arch dam under action of the earthquakes are studied by analyzing the transverse joint opening and stress distribution of the arch dam.The results show that the opening of transverse joints can release the arch stress and reduce the dynamic response of the dam body;repeatedly opening and closing of transverse joints may occur during the process of earthquake;but the openness is small and it can not lead to damage of the sealing material of the transverse joints;the dam can withstand the design earthquake.更多还原