完整岩石參數間之轉換及其相關性探討

Transformation and correlation among intact rock parameters

黎光皓(Kuang-Hao Li)

指導教授 ： 卿建業

共同指導教授 ： 翁孟嘉

國立臺灣大學/工學院/土木工程學研究所/碩士(2017年)

https://doi.org/10.6342/NTU201702668

摘要

無資料

關鍵字

完整岩石 ； ROCK/9/4069 ； 相關性 ； 貝氏分析 ； 多變數機率分布模型

並列摘要

Comparing with safety factor method, reliability-based design method can quantify the uncertainty to design geotechnical structure in a more systematical and economical design. In this study, a multivariate probability distribution model for nine parameters of intact rock is constructed based on the ROCK/9/4069 database. These nine parameters are:(1)unit weight (γ);(2)porosity (n);(3)L-type Schmidt hammer hardness (RL);(4)Shore scleroscope hardness (Sh);(5)Brazilian tensile strength (σbt);(6)point load strength index (Is50);(7)uniaxial compressive strength (σc);(8)Young’s modulus (E);(9)compressional wave velocity (VP). Consistency is shown that the multivariate probability distribution can capture the correlation among the nine parameters. Using the Bayesian analysis framework, the original distributions of the design rock parameters (σc, E) would serve as prior distributions and can be updated into posterior distributions by using different multivariate site-specific information. The forms of posterior distributions were summarized into tables so that detailed Bayesian analysis need not be conducted. From the results, the transformation uncertainty of predicted posterior distribution can be effectively reduced as the multivariate site-specific information increases. With smaller uncertainty, reliability-based design can reduce more economical design.

並列關鍵字

intact rock ； ROCK/9/4069 ； correlations ； Bayesian analysis ； multivariate probability distribution

參考文獻

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