Characterizing uncertainty in geotechnical design of energy piles based on Bayesian theorem     

Hu  Biao  Gong  Quanmei  Zhang  Yueqiang  Yin  Yihe  Chen  Wenjun 《Acta Geotechnica》2022,17(9):4191-4206

It is known that a lot of uncertainties are involved in geotechnical design of energy piles. In this paper, a Bayesian updating framework is presented to characterize those uncertainties. The load-transfer model is developed to predict the thermomechanical response of energy piles. Considering the cross-case variability of the uncertainty in the axial strains of pile, the global model bias is firstly calibrated by establishing a comprehensive database consisting of 12 energy pile cases. Furthermore, the uncertainty in input parameters is considered in the Bayesian updating of model bias in a specific case. The variability of the uncertain parameters is effectively reduced after updating. The coefficient of variation of prediction is decreased from 0.34 to 0.13. The present framework can well quantify uncertain factors and improve the accuracy and reliability of the prediction model.

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南京地铁地基地震液化规范判别的差异分析   总被引：4，自引：1，他引：3  

宫全美  周顺华  方炽华 《岩土力学》2000,21(2):141-144

利用“建筑”和“铁路”二种抗震设计规范 ,对南京地铁 1 # 线区间隧道地基进行了地震液化判别 ,发现两者有差异。详细分析了两规范对贯入点深度、粘粒含量、上覆非液化土层厚度、地下水位等影响因素的不同考虑 ,认为不同的上覆非液化土层的考虑是导致差异的最大原因。  相似文献   

Alternant active and passive trapdoor problem: from experimental investigation to mathematical modeling     

Wu  Yaojie  Zhao  Yu  Gong  Quanmei  Zornberg  Jorge G.  Zhou  Shunhua  Wang  Binglong 《Acta Geotechnica》2022,17(7):2971-2994

Acta Geotechnica - In the classical conception of the arching mechanism, the well-known trapdoor problem assumes distinctive modes (e.g., either active or passive mode) in the original geostatic...  相似文献