Mechanical behavior of prestressed UHPC wind turbine tower columns under combined axial compression and bending

IF 3 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Structural Concrete Pub Date : 2024-09-12 DOI:10.1002/suco.202400223
Zheng Zhou, Xuhong Zhou
{"title":"Mechanical behavior of prestressed UHPC wind turbine tower columns under combined axial compression and bending","authors":"Zheng Zhou, Xuhong Zhou","doi":"10.1002/suco.202400223","DOIUrl":null,"url":null,"abstract":"Developing offshore wind power can effectively reduce carbon emissions, and adopting large‐capacity wind turbines is an important way to achieve cost reduction and efficiency increase. With increasing power capacity, the hub height and rotor‐nacelle assemblies (RNA) load will increase significantly. Ultra‐high performance concrete (UHPC) possesses ultra‐high compressive performance, good tensile, fatigue, and corrosion resistance, and thus is an effective way to further improve the mechanical performance and economic efficiency of tall offshore wind turbine (OWT) towers. Evaluation of ultimate strength is an essential aspect of design for OWT towers, and the tower structure is mainly under the combined action of axial compression from the self‐weight and RNA loads and bending from the eccentricities of RNA and aerodynamic loads from the rotor on the tower top. In this work, the mechanical behavior of prestressed UHPC wind turbine tower columns under combined axial compression and bending was numerically investigated. The finite element (FE) analyses were carried out using ABAQUS, and the material and geometric nonlinearity were considered in the model, as well as the tensile strain hardening properties of UHPC. The FE models were firstly verified by the typical experimental results of UHPC hollow columns, reinforced UHPC beams, prestressed UHPC beams, and prestressed concrete‐steel hybrid wind turbine tower model. Then the parametric study was carried out, and the parameters included the control stress and number of prestressing tendons, rib number, diameter‐to‐thickness ratio of the UHPC column, steel ratio of longitudinal reinforcement, axial load ratio, and UHPC strength. The calculation methods for flexural capacity of prestressed UHPC wind turbine tower columns were finally proposed, and were found to agree well with the modeling results.","PeriodicalId":21988,"journal":{"name":"Structural Concrete","volume":null,"pages":null},"PeriodicalIF":3.0000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Structural Concrete","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1002/suco.202400223","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

Developing offshore wind power can effectively reduce carbon emissions, and adopting large‐capacity wind turbines is an important way to achieve cost reduction and efficiency increase. With increasing power capacity, the hub height and rotor‐nacelle assemblies (RNA) load will increase significantly. Ultra‐high performance concrete (UHPC) possesses ultra‐high compressive performance, good tensile, fatigue, and corrosion resistance, and thus is an effective way to further improve the mechanical performance and economic efficiency of tall offshore wind turbine (OWT) towers. Evaluation of ultimate strength is an essential aspect of design for OWT towers, and the tower structure is mainly under the combined action of axial compression from the self‐weight and RNA loads and bending from the eccentricities of RNA and aerodynamic loads from the rotor on the tower top. In this work, the mechanical behavior of prestressed UHPC wind turbine tower columns under combined axial compression and bending was numerically investigated. The finite element (FE) analyses were carried out using ABAQUS, and the material and geometric nonlinearity were considered in the model, as well as the tensile strain hardening properties of UHPC. The FE models were firstly verified by the typical experimental results of UHPC hollow columns, reinforced UHPC beams, prestressed UHPC beams, and prestressed concrete‐steel hybrid wind turbine tower model. Then the parametric study was carried out, and the parameters included the control stress and number of prestressing tendons, rib number, diameter‐to‐thickness ratio of the UHPC column, steel ratio of longitudinal reinforcement, axial load ratio, and UHPC strength. The calculation methods for flexural capacity of prestressed UHPC wind turbine tower columns were finally proposed, and were found to agree well with the modeling results.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
预应力超高性能混凝土风力涡轮机塔柱在轴向压缩和弯曲联合作用下的力学行为
发展海上风电可有效减少碳排放,而采用大容量风力涡轮机是实现降本增效的重要途径。随着发电量的增加,轮毂高度和转子-机舱组件(RNA)的负荷也将大幅增加。超高性能混凝土(UHPC)具有超高的抗压性能、良好的抗拉、抗疲劳和耐腐蚀性能,因此是进一步提高高大海上风力涡轮机(OWT)塔架机械性能和经济效益的有效途径。极限强度评估是海上风力涡轮机塔架设计的一个重要方面,塔架结构主要受到自重和 RNA 载荷的轴向压缩、RNA 偏心弯曲以及塔顶转子空气动力载荷的共同作用。在这项工作中,对预应力 UHPC 风力涡轮机塔柱在轴向压缩和弯曲联合作用下的力学行为进行了数值研究。使用 ABAQUS 进行了有限元(FE)分析,并在模型中考虑了材料和几何非线性以及 UHPC 的拉伸应变硬化特性。首先通过 UHPC 空心柱、加筋 UHPC 梁、预应力 UHPC 梁和预应力混凝土-钢混合风力涡轮机塔架模型的典型实验结果对有限元模型进行了验证。然后进行了参数研究,参数包括预应力筋的控制应力和数量、肋数、UHPC 柱的直径与厚度比、纵向钢筋的钢率、轴向荷载比和 UHPC 强度。最终提出了预应力 UHPC 风力涡轮机塔柱抗弯承载力的计算方法,结果与建模结果吻合良好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Structural Concrete
Structural Concrete CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
5.60
自引率
15.60%
发文量
284
审稿时长
3 months
期刊介绍: Structural Concrete, the official journal of the fib, provides conceptual and procedural guidance in the field of concrete construction, and features peer-reviewed papers, keynote research and industry news covering all aspects of the design, construction, performance in service and demolition of concrete structures. Main topics: design, construction, performance in service, conservation (assessment, maintenance, strengthening) and demolition of concrete structures research about the behaviour of concrete structures development of design methods fib Model Code sustainability of concrete structures.
期刊最新文献
Development of a new analytical model for circular concrete ring segments with dry joints under combined effects Fiber orientation and orientation factors in steel fiber‐reinforced concrete beams with hybrid fibers: A critical review Load‐path analysis of transverse tensile stresses in multiple‐pile caps Mechanical behavior of prestressed UHPC wind turbine tower columns under combined axial compression and bending Experimental investigation on mechanical property and hydration process of sintered sludge cement paste at different water‐binder ratios and curing ages
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1