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本文利用有限元法,对丹江坝闸墩结构进行了动力分析,监对结构采用了十种不同的简化模型,着重研究其中的三种。通过计算求得了结构前五阶振型和频率。在地震反应的计算中,输入了(一)新丰江、(二)丹江、(三)印度柯依那等三条实测地震波记录。求得了结构在上述地震作用下的加速度和应力分布规律。文中对选用地震记录的波谱特性,进行了较详细的分析比较。並在谱烈度和能量概念的基础上,论证了计算中所出现的某些差别和原因。最后,对闸墩的抗震分析,提出了某些建议和改进意见。
In this paper, the finite element method is used to analyze the structure of the dam pier in Danjiang Dam. Ten different simplified models are adopted for the monitoring structure, and three of them are studied emphatically. The first five modes and frequencies of the structure are calculated. In the calculation of earthquake response, three recorded seismic waves records such as (a) Xinfeng River, (2) Danjiang River and (3) Keke Naha were entered. The distribution of the acceleration and stress of the structure under the above earthquake is obtained. In this paper, the spectral characteristics of the selected seismic records are analyzed and compared in more detail. On the basis of spectrum intensity and energy concept, some differences and causes in calculation are demonstrated. Finally, some suggestions and suggestions for improving the anti-seismic performance of the pier are put forward.