Compression-bending behavior of thin-walled prestressed concrete tower with horizontal joint for wind turbines: Experimental study and calculation model

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-04 DOI:10.1016/j.tws.2025.113154

Wei Ren , Xu-Hong Zhou , Ran Deng , Shou-Zhen Li , Yu-Hang Wang

{"title":"Compression-bending behavior of thin-walled prestressed concrete tower with horizontal joint for wind turbines: Experimental study and calculation model","authors":"Wei Ren , Xu-Hong Zhou , Ran Deng , Shou-Zhen Li , Yu-Hang Wang","doi":"10.1016/j.tws.2025.113154","DOIUrl":null,"url":null,"abstract":"<div><div>This paper presents an experimental and analytical study on the compression-bending behavior of prestressed concrete towers, considering the effect of horizontal joints and prestress. Since the horizontal joint between the concrete tower and the foundation are not reinforced with continuous rebars, but are merely connected through prestressing force, there is a possibility of joint opening under the large bending moment. Five prestressed concrete tower specimens were tested under compression-bending loads. The key parameter in the experiment was the prestress ratio. The results showed that the increase of prestress can significantly constraint the opening of horizontal joints and improve the ultimate capacity of the tower, but the ductility and self-centering performance are reduced. Compared to the specimen with the lowest prestress ratio 0.11, the specimen with the highest prestress ratio 0.44 showed an increase of 84.56 % on the ultimate capacity, but showed a reduction of 79.84 % on the ductility. The accuracy of two commonly used design methods were evaluated based on test results. The relative errors were 48.6 % and 19.3 %, respectively, which showed low accuracy and applicability. Finally, based on the equivalent plastic hinge model, an analytical study was conducted. A theoretical model of the load-displacement curve was presented and the theoretical results were compared with the test results, showing a relative error of 4.2 %. The result indicated that the theoretical model can effectively predict the compression-bending capacity. In general, the revealed compression-bending mechanism and the proposed theoretical model can provide a guidance for the engineering design of prestressed concrete towers.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113154"},"PeriodicalIF":5.7000,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin-Walled Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263823125002484","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

This paper presents an experimental and analytical study on the compression-bending behavior of prestressed concrete towers, considering the effect of horizontal joints and prestress. Since the horizontal joint between the concrete tower and the foundation are not reinforced with continuous rebars, but are merely connected through prestressing force, there is a possibility of joint opening under the large bending moment. Five prestressed concrete tower specimens were tested under compression-bending loads. The key parameter in the experiment was the prestress ratio. The results showed that the increase of prestress can significantly constraint the opening of horizontal joints and improve the ultimate capacity of the tower, but the ductility and self-centering performance are reduced. Compared to the specimen with the lowest prestress ratio 0.11, the specimen with the highest prestress ratio 0.44 showed an increase of 84.56 % on the ultimate capacity, but showed a reduction of 79.84 % on the ductility. The accuracy of two commonly used design methods were evaluated based on test results. The relative errors were 48.6 % and 19.3 %, respectively, which showed low accuracy and applicability. Finally, based on the equivalent plastic hinge model, an analytical study was conducted. A theoretical model of the load-displacement curve was presented and the theoretical results were compared with the test results, showing a relative error of 4.2 %. The result indicated that the theoretical model can effectively predict the compression-bending capacity. In general, the revealed compression-bending mechanism and the proposed theoretical model can provide a guidance for the engineering design of prestressed concrete towers.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.