Fractile-based method for selecting characteristic values for geotechnical design with LRFD

Zhang, Yongjie; Shen, Mengfen ✉; Juang, C. Hsein; Tan, Xiaohui

Angol nyelvű Tudományos Szakcikk (Folyóiratcikk)
Megjelent: SOILS AND FOUNDATIONS 0038-0806 60 (1) pp. 115-128 2020
  • SJR Scopus - Civil and Structural Engineering: Q1
    Load and resistance factor design (LRFD), also known as partial factor design, is becoming a design method of choice in geotechnical practice. The partial factors (i.e., resistance factor and load factor) to ensure safety are specified in the adopted code; however, engineers still need to select values for the uncertain soil parameters in a design. The selection of these parameter values, often called characteristic values, is quite challenging given soil variability and limited test data. This paper presents a fractile-based method for the selection of the characteristic values for the uncertain soil parameters in a design with LRFD. A framework that considers safety, cost, and robustness is established to determine an appropriate fractile for selecting the characteristic values. This framework is demonstrated with two examples, a drilled shaft in sand and a shallow spread foundation. The results show that robust designs can be achieved using LRFD with the characteristic values obtained through the proposed fractile-based method. (C) 2020 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
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    2021-05-12 08:03