Civil Engineering / İnşaat Mühendisliği
Permanent URI for this collectionhttps://hdl.handle.net/11147/13
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Conference Object Citation - WoS: 1Citation - Scopus: 1Validation of Porosity in 2d-Dem Cpt Model Using Large Scale Shaking Table Tests in Saturated Sands(Taylor & Francis, 2015) Bakunowicz, Paulina; Ecemiş, NurhanThis paper contains the calibration phase of two-dimensional numerical modelling of Cone Penetration Tests (CPT) in clean saturated sand deposits. The data for calibration is obtained from the CPTs conducted before five different large scale laminar box shaking table tests. The numerical simulations of the cone penetration tests are carried out under application of the Distinct Element Method (DEM) software PFC2D (ITASCA, 2008). This software has additional basic fluid analysis option which uses well recognized SIMPLE shame (Patankar, 1980). A series of conventional Consolidated Drained (CD) triaxial tests were performed in the laboratory to assess the stress-strain behavior of the tested soil. Based on these physical experiments, calibration and scaling of DEM model was performed. In this paper, it is also proven that CPT laminar box based correlations facilitate to overcome limitations of 2D simulation. Outcome can be widely and successfully applied both in scientific research and engineering practice.Article Citation - WoS: 13Citation - Scopus: 13Effect of Soil-Type and Fines Content on Liquefaction Resistance—shear-Wave Velocity Correlation(Taylor & Francis, 2020) Ecemiş, NurhanDirect measurement of shear-wave velocity, Vs, in the field to evaluate the liquefaction resistance of soils is an alternative or complement approach to penetration-based methods. However, the existing liquefaction assessment methods established on the Vs have uncertainties about how the fines content and soil-type change the relationship between Vs and liquefaction resistance. The first part of this paper discusses the existence of fines on the correlation between cone penetration resistance and Vs. The second part focuses on the liquefaction resistance that is construed over again using the simplified cone penetration test (CPT)-based liquefaction screening procedure in terms of Vs for three distinct ranges of non-/low plastic fines content <35% fines. The outcomes of the investigation indicate that for each fines content, the correlation between CRR and Vs1 is not unique; there is a significant scattering of the curves for different soil types. Finally, using the results of this investigation as well as the simplified CPT-based liquefaction screening method, a soil-type specific CRR–Vs1 relationship developed for the unbounded, very young (Holocene-age) soils. © 2018 Taylor & Francis Group, LLC