Details
| Original language | English |
|---|---|
| Pages (from-to) | 1350-1357 |
| Number of pages | 8 |
| Journal | Structural Concrete |
| Volume | 20 |
| Issue number | 4 |
| Early online date | 28 Mar 2019 |
| Publication status | Published - 12 Sept 2019 |
Abstract
With the rising demand of clean wind energy, concrete and hybrid segmental towers have been frequently constructed in recent years. In the area of very high towers, they have replaced the traditional steel towers due to better transportability and economy. However, the joints between adjacent segments have led to questions, which are not satisfactorily resolved by current models or calculation approaches. The transmission of shear forces and torsion moments take place exclusively inside the so-called horizontal dry joint. Current calculations are carried out according to the torsion theories of Bredt for ring cross sections and Saint-Venant for open thin-walled cross sections. However, these approaches, which are used to describe the bearing and deformation behavior of such joints, are insufficient. Depending on the loading situation, this leads to both unsafe results and unused strength. In this paper, an actual wind tower construction with a ring cross section is thoroughly analyzed based on current theory. Additionally, numerical simulations are carried out. The torsion resistance of segmental tower structures is investigated in detail. The inaccuracy of current theories is demonstrated.
Keywords
- circular ring, dry joints, gap joint, precast construction, segmental construction, torsion, wind turbine tower
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Materials Science(all)
- Engineering(all)
- Mechanics of Materials
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In: Structural Concrete, Vol. 20, No. 4, 12.09.2019, p. 1350-1357.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Behavior of externally prestressed segmental towers' dry joint under torsion effects
AU - Kang, Chongjie
AU - Hartwig, Steffen
AU - Marx, Steffen
N1 - Funding Information: The joint project "Ventus efficiens" was financially supported by the Lower Saxony Research Foundation. All support is gratefully acknowledged.
PY - 2019/9/12
Y1 - 2019/9/12
N2 - With the rising demand of clean wind energy, concrete and hybrid segmental towers have been frequently constructed in recent years. In the area of very high towers, they have replaced the traditional steel towers due to better transportability and economy. However, the joints between adjacent segments have led to questions, which are not satisfactorily resolved by current models or calculation approaches. The transmission of shear forces and torsion moments take place exclusively inside the so-called horizontal dry joint. Current calculations are carried out according to the torsion theories of Bredt for ring cross sections and Saint-Venant for open thin-walled cross sections. However, these approaches, which are used to describe the bearing and deformation behavior of such joints, are insufficient. Depending on the loading situation, this leads to both unsafe results and unused strength. In this paper, an actual wind tower construction with a ring cross section is thoroughly analyzed based on current theory. Additionally, numerical simulations are carried out. The torsion resistance of segmental tower structures is investigated in detail. The inaccuracy of current theories is demonstrated.
AB - With the rising demand of clean wind energy, concrete and hybrid segmental towers have been frequently constructed in recent years. In the area of very high towers, they have replaced the traditional steel towers due to better transportability and economy. However, the joints between adjacent segments have led to questions, which are not satisfactorily resolved by current models or calculation approaches. The transmission of shear forces and torsion moments take place exclusively inside the so-called horizontal dry joint. Current calculations are carried out according to the torsion theories of Bredt for ring cross sections and Saint-Venant for open thin-walled cross sections. However, these approaches, which are used to describe the bearing and deformation behavior of such joints, are insufficient. Depending on the loading situation, this leads to both unsafe results and unused strength. In this paper, an actual wind tower construction with a ring cross section is thoroughly analyzed based on current theory. Additionally, numerical simulations are carried out. The torsion resistance of segmental tower structures is investigated in detail. The inaccuracy of current theories is demonstrated.
KW - circular ring
KW - dry joints
KW - gap joint
KW - precast construction
KW - segmental construction
KW - torsion
KW - wind turbine tower
UR - http://www.scopus.com/inward/record.url?scp=85063616651&partnerID=8YFLogxK
U2 - 10.1002/suco.201800266
DO - 10.1002/suco.201800266
M3 - Article
VL - 20
SP - 1350
EP - 1357
JO - Structural Concrete
JF - Structural Concrete
SN - 1464-4177
IS - 4
ER -