广西科技大学学报2025，Vol.36Issue(6)：58-66,9.DOI:10.16375/j.cnki.cn45-1395/t.2025.06.008
钢绞线弯折张拉试验台座设计与分析
Design and analysis of a bending-tension testing platform for steel strands
摘要
Abstract
To address the testing requirements for prestress loss in single external steel strands in mountainous photovoltaic applications,this study designed a lightweight integrated self-anchored steel strand bending tension test platform.By integrating the technical advantages of traditional linear tensioning platforms and curved tensioning systems,three innovative structural features were proposed as follows:A cantilevered reaction wall achieved self-anchoring under large eccentric compression,with an overturning resistance coefficient of 2.76>1.5(code limit);Embedded PBL shear keys were employed as the lower structure of the bending device,representing an application of traditional bridge components in new structures,thereby reducing foundation treatment and assembly processes;A"conceptual design-numerical simulation"verification model was established to validate its stiffness,strength,and stability.Calculation results demonstrate that the platform's maximum displacement is 0.356 mm<2 mm(code limit),and that the damage factor in the concrete tensile zone stabilized at 0.361 5 and exhibited localized distribution,with damage controllability achieved through the ductile design of PBL keys,meeting the requirements for over 30 repeated tension cycles,and that steel components remained in the elastic deformation stage.Engineering applications confirm that the platform,characterized by its"localized damage and recoverable stiffness"resilience,resolves durability challenges in small-scale tensioning devices,provides a cost-effective solution for testing single external prestressed steel strands in mountainous photovoltaic environments and offers reference insights for the design of similar tensioning platforms.关键词
光伏柔性支架/预应力张拉台座/PBL剪力键/循环荷载/塑性损伤Key words
photovoltaic flexible support/prestressed tensioning platform/PBL shear connector/cyclic loading/plastic damage分类
建筑与水利引用本文复制引用
杨雄文,梁莉云,纪寅峰..钢绞线弯折张拉试验台座设计与分析[J].广西科技大学学报,2025,36(6):58-66,9.基金项目
广西科技重大专项(桂科AA22068066)资助 （桂科AA22068066）
