Design and behavior of 160 m-tall post-tensioned precast concrete-steel hybrid wind turbine tower
Design and behavior of 160 m-tall post-tensioned precast concrete-steel hybrid wind turbine tower
Xiangguo Wu(Fuzhou University); Xuesen Zhang(CGN New Holdings Co, Ltd, Beijing, 100070, China); Qingtan Zhang(Harbin Institute of Technology); Dong Zhang(Fuzhou University); Xiaojing Yang(Fuzhou University); Faqiang Qiu(JianYan Test Group Co., Ltd); Suhyun Park(Seoul National University); Thomas H.-K. Kang(Seoul National University)
44권 3호, 407~421쪽
초록
Prefabricated hybrid wind turbine towers (WTTs) are promising due to height increase. This study proposes the use of ultra-high performance concrete (UHPC) to develop a new type of WTT without the need to use reinforcement. It is demonstrated that the UHPC WTT structure without reinforcing bars could achieve performance similar to that of reinforced concrete WTTs. To simplify the design of WTT, a design approach for the calculation of stresses at the horizontal joints of a WTT is proposed. The stress distribution near the region of the horizontal joint of the WTT structure under normal operating conditions and different load actions is studied using the proposed approach, which is validated by the finite element method. A further parametric study shows that the degree of prestressing and the bending moment both significantly affect the principal stress. The shear-to-torsion ratio also shows a significant influence on the principal tensile stress.
Abstract
Prefabricated hybrid wind turbine towers (WTTs) are promising due to height increase. This study proposes the use of ultra-high performance concrete (UHPC) to develop a new type of WTT without the need to use reinforcement. It is demonstrated that the UHPC WTT structure without reinforcing bars could achieve performance similar to that of reinforced concrete WTTs. To simplify the design of WTT, a design approach for the calculation of stresses at the horizontal joints of a WTT is proposed. The stress distribution near the region of the horizontal joint of the WTT structure under normal operating conditions and different load actions is studied using the proposed approach, which is validated by the finite element method. A further parametric study shows that the degree of prestressing and the bending moment both significantly affect the principal stress. The shear-to-torsion ratio also shows a significant influence on the principal tensile stress.
- 발행기관:
- 국제구조공학회
- 분류:
- 구조공학