The Effect of Targeted Field Investigation on the Reliability of Earth-Retaining Structures in Active State
| Autor: | Lysandros Pantelidis, Elias Gravanis, Panagiotis Christodoulou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Probabilistic analysis
Random finite element method random finite element method Field (physics) 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Soil sampling location Retaining wall Civil Engineering lcsh:Technology 0201 civil engineering characteristic value lcsh:Chemistry Lateral earth pressure optimal sampling location General Materials Science Probabilistic analysis of algorithms Instrumentation lcsh:QH301-705.5 Reliability (statistics) 021101 geological & geomatics engineering Mathematics Fluid Flow and Transfer Processes Random field soil sampling location business.industry spatial correlation length lcsh:T Process Chemistry and Technology General Engineering Sampling (statistics) Structural engineering Characteristic value Spatial correlation length probabilistic analysis Finite element method lcsh:QC1-999 Computer Science Applications Optimal sampling location lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Engineering and Technology active earth pressure Active earth pressure business lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 9, Iss 22, p 4953 (2019) Applied Sciences Volume 9 Issue 22 |
| ISSN: | 2076-3417 |
| Popis: | 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 &ldquo actual&rdquo resultant earth pressure force on the retaining wall (calculated using the friction angle random field) is greater than the respective &ldquo predicted&rdquo 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. |
| Databáze: | OpenAIRE |
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