The object of the study was a short profile with a C-shaped section, made of a carbonepoxy composite. The column is a structure consisting of thin-walled flat plates joined on longer edges. The analysed C-section was subjected to eccentric pressure shifted from the cross-section centre of mass. The boundary conditions assumed for the study ensured the appropriate support of the end sections of the profile. The conducted analysis allowed for the evaluation of the effects of eccentricity on the value of the critical force of the structure. The scope of the study included both experimental research conducted on a physical model of the structure and numerical analysis by the finite element method using Abaqus software. The conducted numerical analysis included the solution of the eigenvalue problem of structure’s stability. On the basis of the example analysed below, it was possible to determine the effect of the eccentricity of load on the behaviour of the thin-walled composite column.
2
Dostęp do pełnego tekstu na zewnętrznej witrynie WWW
W artykule przedstawiono analizę zagadnienia posadowienia elektrowni wiatrowych. Rozważano pracę fundamentów bezpośrednich poddanych obciążeniom z dużym mimośrodem. Opisano stosowane w praktyce wymagania w kontekście użytkowalności. Przedstawiono również model 3D do analiz MES zjawiska odrywania fundamentu.
EN
In the article, the analysis of the foundation problem of the wind power plate is presented. It considered the work of the shallow foundation put the loads with the big eccentric. The requirements used in practice in the light of serviceability was described. The numerical 3D FEM model, which could simulate the tearing out of the foundation, was also presented.
The subject of study was a thin-walled C-section made of carbon fiber reinforced polymer (CFRP). Column was subjected to eccentric compression in the established direction. In the computer simulation, the boundary conditions were assumed in the form of articulated support of the sections of the column. Particular studies included an analysis of the effects of eccentricity on the critical force value. The research was conducted using two independent research methods: numerical and experimental. Numerical simulations were done using the finite element method using the advanced system Abaqus®. The high sensitivity of the critical force value corresponding to the local buckling of the channel section to the load eccentricity was demonstrated.
W ostatnich kilku latach, na terenach Pomorza Zachodniego i Środkowego następuje gwałtowny rozwój źródeł energii odnawialnej w postaci zrealizowanych bądź projektowanych farm elektrowni wiatrowych. Jednym z zagadnień przy wznoszeniu takich obiektów jest projektowanie i wykonawstwo bezpiecznego posadowienia bezpośredniego wiatraków, poddawanego znacznym obciążeniom mimośrodowym. W artykule zamieszczono uwagi na temat metodyki projektowania geotechnicznego takich fundamentów, wg zaleceń EN7 oraz normy PN-81/B-03020, zgromadzone m.in. podczas prac konsultacyjnych przy badaniach podłoża i projektowaniu posadowień elektrowni wiatrowych.
EN
In the last few years a rapid development of the renewable energy sources such as a windmill farms is taking place in the area of the West and Middle Pomerania region, in Poland. A design and accomplishment of a safe spread foundation, subjected to the large eccentricity loads, is one of the problems to solve during such structures' raising. The paper contains some comments on geotechnical design methodology of square, flat foundations, according rules of "Eurocode 7" Standard, (EN7), and Polish Standard PN-81/B-03020, collected by authors acting as a consultant designer and soil investigator for windmill farms projects.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.