Long and short periodic deformations of slender structures caused by temperature and wind

• Autorzy: Breuer P. , Chmielewski T. , Górski P. , Konopka E. , Tarczyński L.
• Języki publikacji: EN

Abstrakty

EN

Elastic deformations of two high-rise towers caused by wind and sun radiation were evaluated by surveying methods using GPS and levelling. Oscillations by wind mostly occur perpendicular to the wind direction as predicted by the Karman Effect. The frequency of these oscillations appears to be independent of the wind velocity. The influence of sun radiation leads to an elastic deformation in a period of 24 hours in the form of a slim ellipse. The diameter of that ellipse in the East-West direction is twice as large as in the North-South direction. The velocity of displacement is controlled by the intensity of the sun's rays. GPS methods for positioning and levelling for height recording lead to identical deformation results. The geodesic suweying results should be considered in relation to the parameters of the static construction due to Civil Engineering and to the results of physical surveying melhods.

Słowa kluczowe

EN

slender structures; periodic deformations; properties of towers; GPS monitoring method; thermic influences; karman effect; geodesic

PL

odkształcenia budowli; odkształcenia plastyczne; wiatr; promieniowanie słoneczne; budowle wieżowe

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Budownictwo / Politechnika Opolska
• Rocznik: 2003
• Tom: z. 47
• Strony: 87--102
• Opis fizyczny: Bibliogr. 3 poz., rys., wykr.

Twórcy

autor

Breuer P.

• University of Applied Sciences, Stuttgart, Germany

autor

Chmielewski T.

• Technical University of Opole

autor

Górski P.

• Technical University of Opole

autor

Konopka E.

• University of Applied Sciences, Stuttgart, Germany

autor

Tarczyński L.

• Technical University of Opole

Bibliografia

• [1] BREUER P., Schwingung und Auslenkung hoher Tiirme aufgrund von Windlasten und Temperaturgang, Erfassung von Amplitudę und Frequenz durch kinematische GPS-Methoden Forschungsbericht der HfT Stuttgart 1998, S. 110-118 Forschungsbericht der HfT Stuttgart 1999, S. 68-77.
• [2] BREUER P., Elastische Schwingungen bei Starkwind am Industrickainin Elektrownia Opole - GPS Kinematic On The Fly (KOF) Forschungsbericht der HfT Stuttgart 2001.
• [3] BREUER P., CHMIELEWSKI T., GÓRSKI P„ KONOPKA E., Application of GPS technology to measurements of displacements of high-rise structures due to weak winds Journal of Wind Engineering and Industrial Aerodynamics, 2002, 223-230, Baltimore U.S.A.