Details
| Translated title of the contribution | Torsion structural behavior of external prestressed circular segments with dry joints |
|---|---|
| Original language | German |
| Pages (from-to) | 740-746 |
| Number of pages | 7 |
| Journal | Beton- und Stahlbetonbau |
| Volume | 112 |
| Issue number | 11 |
| Publication status | Published - 2 Nov 2017 |
Abstract
Torsion structural behavior of external prestressed circular segments with dry joints. In the tower construction of wind power plants concrete or hybrid towers are established, especially for high towers, they have replaced the traditional steel towers due to better transportability. The needed joints for the prefabricated construction method leads to problems, which are not satisfactorily resolved by the current models and calculation approaches. In the case of the formation of dry joints (horizontal joints) between the segments, the force transmission of the lateral forces and torsion moments take place exclusively through the friction in the joint, the external prestressing and the coefficient of friction generate the frictional resistance. The capacity of lateral force between the joints should be calculate by a linear calculation approach, that the permissible transverse force corresponds to the prestressing force multiplied by the coefficient of friction. For the transmission of the torsional moments, the calculation is carried out according to the known torsion theories of Bredt and Saint-Venant, as long as the joints are overpressed, they can transmit a very high torsional moment. However, in the ultimate limit state, if the joint begin to open, the permissible torsional moment drops immediately to a very small value and thus becoming a critical criterion for the tower. According to recent investigations, these approaches witch describe the bearing and deformation behavior of such a joints are incorrect, results in an uncertainty range and a very large unused potential.
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In: Beton- und Stahlbetonbau, Vol. 112, No. 11, 02.11.2017, p. 740-746.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Zum Torsionstragverhalten extern vorgespannter Kreissegmente mit trockenen Fugen
AU - Hartwig, Steffen
AU - Marx, Steffen
N1 - Publisher Copyright: Copyright © 2017 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin
PY - 2017/11/2
Y1 - 2017/11/2
N2 - Torsion structural behavior of external prestressed circular segments with dry joints. In the tower construction of wind power plants concrete or hybrid towers are established, especially for high towers, they have replaced the traditional steel towers due to better transportability. The needed joints for the prefabricated construction method leads to problems, which are not satisfactorily resolved by the current models and calculation approaches. In the case of the formation of dry joints (horizontal joints) between the segments, the force transmission of the lateral forces and torsion moments take place exclusively through the friction in the joint, the external prestressing and the coefficient of friction generate the frictional resistance. The capacity of lateral force between the joints should be calculate by a linear calculation approach, that the permissible transverse force corresponds to the prestressing force multiplied by the coefficient of friction. For the transmission of the torsional moments, the calculation is carried out according to the known torsion theories of Bredt and Saint-Venant, as long as the joints are overpressed, they can transmit a very high torsional moment. However, in the ultimate limit state, if the joint begin to open, the permissible torsional moment drops immediately to a very small value and thus becoming a critical criterion for the tower. According to recent investigations, these approaches witch describe the bearing and deformation behavior of such a joints are incorrect, results in an uncertainty range and a very large unused potential.
AB - Torsion structural behavior of external prestressed circular segments with dry joints. In the tower construction of wind power plants concrete or hybrid towers are established, especially for high towers, they have replaced the traditional steel towers due to better transportability. The needed joints for the prefabricated construction method leads to problems, which are not satisfactorily resolved by the current models and calculation approaches. In the case of the formation of dry joints (horizontal joints) between the segments, the force transmission of the lateral forces and torsion moments take place exclusively through the friction in the joint, the external prestressing and the coefficient of friction generate the frictional resistance. The capacity of lateral force between the joints should be calculate by a linear calculation approach, that the permissible transverse force corresponds to the prestressing force multiplied by the coefficient of friction. For the transmission of the torsional moments, the calculation is carried out according to the known torsion theories of Bredt and Saint-Venant, as long as the joints are overpressed, they can transmit a very high torsional moment. However, in the ultimate limit state, if the joint begin to open, the permissible torsional moment drops immediately to a very small value and thus becoming a critical criterion for the tower. According to recent investigations, these approaches witch describe the bearing and deformation behavior of such a joints are incorrect, results in an uncertainty range and a very large unused potential.
UR - http://www.scopus.com/inward/record.url?scp=85032690461&partnerID=8YFLogxK
U2 - 10.1002/best.201700042
DO - 10.1002/best.201700042
M3 - Artikel
VL - 112
SP - 740
EP - 746
JO - Beton- und Stahlbetonbau
JF - Beton- und Stahlbetonbau
SN - 0005-9900
IS - 11
ER -