https://scholars.lib.ntu.edu.tw/handle/123456789/598505
標題: | On the Hole Effect in Soil Spatial Variability | 作者: | Chang Y.-C Ching J Phoon K.-K Yue Q. JIAN-YE CHING |
關鍵字: | Cosine Whittle-Mat?rn (CosWM) model;Hole effect;Non-monotonic autocorrelation;Spatial variability;Engineering;Industrial engineering;Autocorrelation functions;Cone penetration tests;Geo-statistics;Geotechnical structure;Probability of failure;Scale of fluctuation;Simulation example;Autocorrelation | 公開日期: | 2021 | 卷: | 7 | 期: | 4 | 來源出版物: | ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering | 摘要: | A hole-effect autocorrelation function is one that is non-monotonic or pseudo-periodic as defined in the geostatistics literature. This paper shows that such an autocorrelation function (ACF) can influence the probability of failure of some geotechnical structures. As such, it is relevant to ask whether this hole effect does exist and is identifiable from the cone penetration test data. For this purpose, a novel hole-effect ACF model, called the cosine Whittle-Mat?rn (CosWM) model, is proposed to simultaneously identify the scale of fluctuation (SOF), sample path smoothness, and hole effect. Based on simulation examples and two real case histories, it is found that the hole effect is identifiable only if the hole effect is significant and the data record is of sufficient length. One real case history exhibits a significant hole effect, and this hole effect is successfully identified by the CosWM model. It is also found that if a monotonic ACF is adopted in place of the CosWM model for this case history, not only can the hole effect not be identified (as is to be expected) but also the SOF will be overestimated significantly. ? 2021 American Society of Civil Engineers. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85110776290&doi=10.1061%2fAJRUA6.0001168&partnerID=40&md5=951ded33563e794b43c2beda9034f909 https://scholars.lib.ntu.edu.tw/handle/123456789/598505 |
ISSN: | 23767642 | DOI: | 10.1061/AJRUA6.0001168 |
顯示於: | 土木工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。