广西科技大学学报2025，Vol.36Issue(5)：35-42,8.DOI:10.16375/j.cnki.cn45-1395/t.2025.05.005
钢绞线不同弯折情况下的破断力与预应力损失试验研究
Experimental study on the breaking force and prestress loss of steel strands under different bending conditions
摘要
Abstract
When the flexible photovoltaic bracket is applied in the complex terrain such as mountains and hills,the steel strand is easy to bend due to the significant relief of the terrain,which leads to the prestress loss and the decay of the breaking force.Based on the 60 mm×60 mm×4 mm square tubes and Φ44.55 mm roller structures that are widely used in engineering,this paper analyzed the influence of different bending angles(10°,20°,30°)on the breaking force and prestress loss of steel strands through the combination of theoretical modeling and experimental testing.Theoretical calculations show that the prestress loss of steel strands increases with the increase of the bending angle.The experimental results show that when the bending angle increases from 10° to 30°,the breaking force under the square tube structure decreases from 230 kN to 175 kN,and under the roller structure,it decreases from 220 kN to 164 kN.The square tube structure has an advantage in maintaining the breaking force.When the bending angle is small(≤20°),the roller structure can reduce prestress loss,but when the angle increases to 30°,its loss exceeds that of the square tube structure.In addition,the friction loss rate decreases with the increase of the tension force,and the roller structure shows good linear characteristics at small angles.The research conclusions provide theoretical and experimental basis for the reasonable selection of bending structures in the design of flexible photovoltaic supports.关键词
钢绞线/弯折/预应力损失/柔性光伏支架Key words
steel strand/bending/prestress loss/flexible photovoltaic bracket分类
土木建筑引用本文复制引用
杨雄文,米尔阿地力江·阿木提,赵爽..钢绞线不同弯折情况下的破断力与预应力损失试验研究[J].广西科技大学学报,2025,36(5):35-42,8.基金项目
广西科技重大专项(桂科AA22068066)资助 （桂科AA22068066）
