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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

41卷

期数:

2024年05期

页码:

63-70

栏目:

建筑结构

出版日期:

2024-09-20

文章信息/Info

Title:

Study on wind vibration coefficient of single-layer cable-suspended photovoltaic support

文章编号:

1673-2049(2024)05-0063-08

作者:

李佳炜¹,贺拥军¹,全 勇²

(1. 湖南大学 土木工程学院,湖南 长沙 410082; 2. 中机国际工程设计研究院有限责任公司,湖南 长沙 410021)

Author(s):

LI Jiawei¹, HE Yongjun¹, QUAN Yong²

(1. School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. China Machinery International Engineering Design & Research Institute Co., Ltd., Changsha 410021, Hunan, China)

关键词:

光伏支架;  单层悬索;  风振响应;  风振系数

Keywords:

photovoltaic support;  single-layer cable suspended;  wind vibration response;  wind vibration coefficient

分类号:

TU399

DOI:

10.19815/j.jace.2022.06088

文献标志码:

A

摘要:

单层悬索光伏支架为风敏感结构,然而目前中国规范并无对于其风振系数的规定,故对其风振系数的取值进行研究。应用AR法模拟风荷载并进行动力时程分析,针对结构非线性的特点提出了风振系数的计算方法并编制了计算程序,分析了不同节点处风振系数的基本分布规律,探讨了风振系数随结构参数的变化规律,对比了不同控制点处风振系数的静力等效结果,给出了内力风振系数与竖向位移风振系数的建议取值范围。结果表明:拉索不同节点的内力风振系数较位移风振系数更为集中,各节点的竖向位移风振系数均大于水平位移风振系数; 风振系数受光伏板角度的影响较小,在0°～15°内风振系数几乎不改变; 竖向位移风振系数受钢架间距影响较大,其整体趋势随着钢架间距的增大而增大,但其值有一定的波动; 拉索初始预张力增加会使得竖向位移风振系数大幅减小; 以风振响应最大值点为控制点能保证结构安全且可对结构风振响应进行较好的静力等效; 内力风振系数与竖向位移风振系数的合理取值范围分别为2.0～2.3与3.2～5.5。

Abstract:

The single-layer cable-suspended photovoltaic structure is wind sensitive structure. However, there is no provision for its wind vibration coefficient in the current Chinese code. Therefore, the value of wind vibration coefficient was studied. AR method was used to simulate wind load and dynamic time history analysis was carried out. According to the characteristics of nonlinear structure, the calculation method of wind vibration coefficient was proposed and the calculation program was compiled. The basic distribution law of wind vibration coefficient at different nodes was analyzed. The variation law of wind vibration coefficient with structural parameters was discussed. The static equivalent results of wind vibration coefficient at different control points were compared and the range of wind vibration coefficient of internal force and vertical displacement was given. The results show that the internal force wind vibration coefficient of different nodes of the cable is more concentrated than the displacement wind vibration coefficient. The vertical displacement wind vibration coefficient of each node is greater than the horizontal displacement wind vibration coefficient. The wind vibration coefficient is less affected by the photovoltaic plate angle, and the wind vibration coefficient is almost unchanged from 0° to 15°. The vertical displacement wind vibration coefficient is greatly affected by the steel frame spacing, and its overall trend increases with the increase of the steel frame spacing, but its value has a certain fluctuation. The increase of initial pre-tension of cable will greatly reduce the vertical displacement wind vibration coefficient. Taking the maximum point of wind vibration response as the control point can ensure the safety of the structure and the static equivalent effect of wind vibration coefficient is better. The values of internal force wind vibration coefficient and vertical displacement wind vibration coefficient are 2.0-2.3 and 3.2-5.5.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2023-06-24
基金项目:国家自然科学基金项目(51878261)
通信作者:贺拥军(1970-),男,工学博士,教授,博士生导师,E-mail:hyj0087@163.com。

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更新日期/Last Update: 2024-09-30