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Influence of installation effects on pile bearing capacity in cohesive soils – large deformation analysis via Finite Element Method

Konkol J., Bałachowski L.

Studia Geotechnica et Mechanica

2017

Vol. 39, nr 1

27--38

In this paper, the whole process of pile construction and performance during loading is modelled via large deformation finite element methods such as Coupled Eulerian Lagrangian (CEL) and Updated Lagrangian (UL). Numerical study consists of installation process, consolidation phase and following pile static load test (SLT). The Poznań site is chosen as the reference location for the numerical analysis, where series of pile SLTs have been performed in highly overconsolidated clay (OCR ≈ 12). The results of numerical analysis are compared with corresponding field tests and with so-called “wish-in-place” numerical model of pile, where no installation effects are taken into account. The advantages of using large deformation numerical analysis are presented and its application to the pile designing is shown.

CFD-simulation and installation effects for ultrasonic flow meters in pipes with bends

Hallanger A., Froysa K. E., Lunde P.

International Journal of Applied Mechanics and Engineering

2002

Vol. 7, no 1

33-64

Multipath ultrasonic transit time flow meters (USM) represent an alternative to conventional meters for fiscal gas flow measurement. When the meter is installed close to bend(s), the flow profile can be quite complex, with asymmetric axial and transversal flow profiles. To investigate the accuracy of the measurement in such situations, computational fluid dynamic (CFD) simulations of 3D flow in various bend configurations have been carried out with the finite volume CFD-code MUSIC-2.0. Simulations are compared with measurements in straight pipes of fully developed and rotating flows over a range of Reynolds numbers as well as data for one- and two-bend pipes. The question of grid independence is addressed, as well as the accuracy of the turbulence model. Calculated flow profiles are used as input to the USM uncertainty model GARUSO. The robustness of the USM towards the Reynolds number, bend types, inlet flow profiles, meter orientation and installation length from the last bend is investigated.