基于未確知均值聚類分析的砂土地震液化評價(jià)
[Abstract]:Based on the theory of unascertained measure, an unascertained mean clustering analysis model and method of sand soil liquefaction discrimination and liquefaction potential classification is established. In view of many uncertain factors in sandy soil seismic liquefaction evaluation, earthquake magnitude, ground earthquake acceleration amplitude, standard penetration number, ratio penetration resistance, sand relative density, sand 7 evaluation indexes, such as soil average particle size and ground water level, are used as discriminant factors, and 17 sand samples are selected as training samples to establish unascertained measure function of each evaluation index. The classification center is expressed by the average value of each evaluation index data in the sample, and the weight of evaluation index is determined by the method of weighting the similarity weight, according to the unascertained method. The knowledge measure distance is used to judge the grade of seismic liquefaction. According to the established model, the training sample is returned and the correct rate is 94.12%. to distinguish 20 test samples. The results are compared with the actual conditions of earthquake liquefaction, the BP neural network and the SOFM neural network. The evaluation results of the model are in good agreement with the measured results, as well as the results of BP neural network and SOFM neural network.
【作者單位】: 中南林業(yè)科技大學(xué)土木工程與力學(xué)學(xué)院;
【基金】:湖南省重點(diǎn)學(xué)科建設(shè)項(xiàng)目(2013ZDXK006) 中南林業(yè)科技大學(xué)引進(jìn)高層次人才科研啟動(dòng)基金(104-0094)
【分類號】:TU435
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