Rock and Soil Mechanics ›› 2020, Vol. 41 ›› Issue (6): 2070-2080.doi: 10.16285/j.rsm.2019.1355

• Geotechnical Engineering • Previous Articles     Next Articles

Geometric reliability analysis of geotechnical structures at a specific site

WU Xing-zheng1, WANG Rui-kai1, XIN Jun-xia2, 3   

  1. 1. College of Civil Engineering and Architecture, Hebei University, Baoding, Hebei 071002, China; 2. Beijing Building Construction Research Institute, Beijing 100039, China; 3. Beijing Construction Engineering Quality First Testing Institute Co., Ltd., Beijing 100039, China
  • Received:2019-08-05 Revised:2019-11-20 Online:2020-06-11 Published:2020-08-02
  • Supported by:
    This work was supported by the General Program of Hebei Natural Science Foundation of China (E2019201296), the Key Project of Science and Technology Research in Colleges and Universities of Hebei Province (ZD2018216) and the Advanced Talents Incubation Program of the Hebei University (801260201262).

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Abstract: According to the limit state of geotechnical structures at a specific site under normal conditions of use, the reliability index of various structures is calculated by geometric reliability method that developed in recent years. At the same site, considering the discreteness of load-displacement curves of bored piles, anti-floating anchors and single CFG piles, the regression parameters of these curves show differences and can be regarded as random variables. The correlation and joint distribution characteristics of the site-specific regression parameters are discussed. Based on the joint divergence probability density contour (PDC) of these regression parameters, which means the random variables just reach the critical state of limit bearing capacity, the reliability index of geotechnical structures is calculated by the geometric reliability algorithm in the original space of random variables. The feasibility of geometric reliability algorithm is verified by comparing the geometric reliability index with the results calculated by conventional first-order reliability method. The results show that the geometric reliability evaluation model is simple to implement and can be easily accepted by engineers and technicians.

Key words: discreteness, probability density, goodness-of-fit, bearing capacity, geometric reliability

CLC Number: 

  • TU473
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