International Journal of Concrete Structures and Materials ( IF 3.6 ) Pub Date : 2022-10-03 , DOI: 10.1186/s40069-022-00542-8 Xiangguo Wu , Xuesen Zhang , Hom Bahadur Bhattarai , Hyeon-Jong Hwang , Jing Yang , Soonpil Kang
Based on the conceptual design of an advanced wind turbine tower system, use of ultra-high-performance cementitious composites material with compressive strength of 200 MPa (UHPC-200) is proposed to ensure high durability and ductility of the UHPC hybrid wind turbine tower. Key design parameters are proposed for the structural design of a 3-MW wind turbine. The material properties, mixing compositions, simplified constitutive relationship, and model parameters are outlined. Using nonlinear finite element analysis, the effects of wall thickness, wall thickness ratio, and prestressing tendon on the structural performance including the longitudinal stress field, lateral displacement, stress concentration at the transition zone between the middle and bottom segments are evaluated. Based on the stress-field analysis, the design limitation of the segmental wall thickness and its ratio is recommended. The numerical results show that the tower with the wall thickness ratio of 2:3 (i.e., thickness 200–300 mm) with prestressing tendons is an optimal design for the UHPC hybrid tower. The results of this study can be used as a reference for the engineering design of a new type of UHPC hybrid wind turbine tower.
中文翻译:
3MW超高风力发电机UHPC混合塔在额定风荷载下的结构行为分析
基于先进的风力涡轮机塔架系统的概念设计,提出使用抗压强度为200 MPa的超高性能水泥复合材料(UHPC-200),以确保UHPC混合风力涡轮机塔架的高耐久性和延展性。为 3 兆瓦风力涡轮机的结构设计提出了关键设计参数。概述了材料特性、混合成分、简化的本构关系和模型参数。采用非线性有限元分析,评估了壁厚、壁厚比和预应力筋对结构性能的影响,包括纵向应力场、横向位移、中段和底部过渡区的应力集中。基于应力场分析,推荐节段壁厚及其比例的设计限制。数值结果表明,具有预应力筋的壁厚比为 2:3(即厚度 200-300 mm)的塔是 UHPC 混合塔的最佳设计。本研究结果可为新型UHPC混合风力机塔筒的工程设计提供参考。