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Title: The effect of targeted field investigation on the reliability of earth-retaining structures in active state
Authors: Christodoulou, Panagiotis 
Pantelidis, Lysandros 
Gravanis, Elias 
Major Field of Science: Engineering and Technology
Field Category: Civil Engineering
Keywords: Active earth pressure;Characteristic value;Optimal sampling location;Probabilistic analysis;Random finite element method;Soil sampling location;Spatial correlation length
Issue Date: 18-Nov-2019
Source: Applied Sciences, 2019, vol. 9, no. 22, articl. no. 4953
Volume: 9
Issue: 22
Project: ERATOSTHENES: Excellence Research Centre for Earth Surveillance and Space-Based Monitoring of the Environment 
Journal: Applied Sciences 
Abstract: This paper introduces the concept of targeted field investigation on the reliability of earth-retaining structures in an active state, which is implemented in a random finite element method (RFEM) framework. The open source RFEM software REARTH2D was used and modified suitably in order to accommodate the purposes of the present research. Soil properties are modeled as random fields, and measurements are modeled by sampling from different points of the field domain. Failure is considered to have occurred when the "actual" resultant earth pressure force on the retaining wall (calculated using the friction angle random field) is greater than the respective "predicted" force (calculated using an homogenous friction angle field characterized by the mean of the values sampled from the respective random field). Two sampling strategies are investigated, namely, sampling from a single point and sampling from a domain, through an extensive parametric analysis. As shown, the statistical uncertainty related to soil properties may be significant and can only be minimized by performing targeted field investigation. Among the main findings is that the optimal sampling location in the active state is immediately adjacent to the wall face. In addition, it is advisable that the entire wall height be considered in sampling. Finally, it was observed that the benefit from a targeted field investigation is much greater as compared to the benefit gained using characteristic values in a Load and Resistance Factor Design framework.
ISSN: 2076-3417
DOI: 10.3390/APP9224953
Rights: © by the authors.
Type: Article
Affiliation : Cyprus University of Technology 
Appears in Collections:Publications under the auspices of the EXCELSIOR H2020 Teaming Project/ERATOSTHENES Centre of Excellence

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