摘要
为研究特高压输电钢管塔中C型插板连接典型节点的面外抗弯性能,文中对10个足尺K形节点进行了面外抗弯承载力试验,研究了插板厚度、节点板厚度与螺栓个数对节点面外抗弯性能的影响。在此基础上,还建立了节点的有限元有效模型并对其进行了参数分析,考察了插板与节点板厚度、螺栓个数与螺栓直径、主管径厚比、斜管径厚比以及钢材强度对节点面外抗弯刚度的影响,提出了此类节点面外抗弯刚度的建议计算公式。研究结果表明:在所有试验工况中,插板与节点板厚度的变化,使节点初始转动刚度较基准工况的最大增幅达40.28%;螺栓个数的变化使该刚度的最大增幅为34.30%;钢材强度对节点初始转动刚度的影响趋势为先线性增加后趋于平缓,主管径厚比对节点初始转动刚度的影响甚微,而斜管径厚比与节点板宽厚比对节点面外抗弯刚度的影响较为显著;基于试验和有限元模拟结果提出的节点面外抗弯刚度计算公式具有较好的适用性,可为实际工程提供参考。
In order to study the out-of-plane flexural behavior performance of typical joints of C-type gusset plate connection of UHV transmission steel pipe tower,10 full-scale K-type joints were tested in this paper.The effects of gusset plate thickness,joint plate thickness and bolt number on the out-of-plane flexural behavior performance of joints were studied.On this basis,the finite element model of the joint was established and the parametric analysis was carried out.The effects of the thickness of the gusset plate and the joint plate,the number and the diameter of bolts,the diameter-thickness ratio of the main pipe,the diameter-thickness ratio of the inclined pipe and the steel strength on the out-of-plane flexural behavior of the joint were investigated.The formula for calculating the outof-plane flexural behavior of such joints was proposed.The results show that:In all test conditions,the maximum increase in the initial rotational stiffness of the joints caused by the thickness of the gusset plate and the joint plate is 40.28%,and the maximum increase in the initial rotational stiffness of the joints caused by the number of bolts is 34.30%.The influence of steel strength on the initial rotational stiffness of the joint increases linearly first and then tends to be gentle.The diameter-thickness ratio of the main pipe has little effect on the initial rotational stiffness of the joint,while the diameter-thickness ratio of the inclined pipe and the widththickness ratio of the joint plate have a significant effect on the out-of-plane flexural behavior of the joint.Based on the experimental and finite element simulation results,the calculation formula of out-of-plane flexural behavior of joints has good applicability,which can provide reference for practical engineering.
作者
陈志辉
付诗禧
黄雄辉
徐彬
冯衡
刘红军
CHEN Zhihui;FU Shixi;HUANG Xionghui;XU Bin;FENG Heng;LIU Hongjun(EHV Power Transmission Company of China Southern Power Grid,Guangzhou 510700,China;Central Southern China Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Wuhan 430071,China;College of Civil Engineering,Chongqing University,Chongqing 400045,China)
出处
《建筑钢结构进展》
北大核心
2025年第9期52-63,共12页
Progress in Steel Building Structures
基金
中国南方电网有限责任公司2023年第一批定向科技项目(CGYKJXM20220236)。
关键词
钢管塔
K形节点
足尺试验
抗弯性能
参数分析
初始转动刚度
steel pipe tower
K-joint
full-scale test
flexural behavior performance
parametric analysis
initial rotational stiffness
