用于风电钢塔筒的加劲钢管压弯性能试验研究  

EXPERIMENTAL INVESTIGATION OF COMBINED COMPRESSIONBENDING BEHAVIOR OF STIFFENED STEEL TUBES FOR WIND TURBINE STEEL TOWERS

作　　者：张栋梁 李炜 李天昊 王飞 周绪红[3,4] 任为 曹昀琦[3,4] 王宇航 ZHANG Dong-liang;LI Wei;LI Tian-hao;WANG Fei;ZHOU Xu-hong;REN Wei;CAO Yun-qi;WANG Yu-hang(Key Laboratory of Far-Shore Wind Power Technology of Zhejiang Province,Hangzhou,Zhejiang 311122,China;Power China Huadong Engineering Corporation Limited,Hangzhou,Zhejiang 311122,China;School of Civil Engineering,Chongqing University,Chongqing 400045,China;Key Laboratory of New Technology for Construction of Cities in Mountain Area,Chongqing 400045,China)

机构地区：[1]浙江省深远海风电技术研究重点实验室,浙江杭州311122 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [3]重庆大学土木工程学院,重庆400045 [4]山地城镇建设与新技术教育部重点实验室,重庆400045

出　　处：《工程力学》2024年第1期17-29,共13页Engineering Mechanics

基　　金：中国电建集团华东勘测设计研究院有限公司科技项目(KY2018-XNY-08)。

摘　　要：薄壁圆钢管广泛应用于风电机组锥筒型钢塔筒中,其在径厚比较大时易出现局部失稳,进而导致塔筒承载能力下降。该文提出了一种可用于风电钢塔筒的纵向加劲钢圆钢管结构形式,并进行了6个试件的压弯加载试验,以研究加劲肋形式及径厚比大小对加劲圆钢管压弯性能的影响。试验结果表明:在相同用钢量下,加劲肋有效改善了钢管的局部屈曲,改变了结构的破坏形态,增大了钢管的塑性发展程度,从而提升了钢管的承载力及延性,其中T型加劲肋的增强效果更为明显。并将试验模型与有限元建模进行对照,互相验证了准确性。最后使用现有设计标准对试验结果进行了初步评估,无加劲肋试件与各设计标准吻合良好,但现有计算方法低估了加劲试件的承载力。Thin-walled steel tubes are widely used in conical cylinder steel towers of wind turbines,which are prone to local buckling when the diameter-thickness ratios are large,leading to a decrease in the bearing capacity of the towers.A new structural type of longitudinal stiffened steel tube for wind turbine steel towers was proposed,and six specimens were tested under compression-bending load to study the effect of stiffeners types and diameter-thickness ratios on the compression-bending behavior of steel tubes.The experimental results showed thatwith the same amount of the steel,the stiffeners could effectively prevent the local buckling of the steel tubes,resulting in changing the failure mode of the structure and increasing the plastic development,and thus improving the strength and ductility of the steel tube.The enhancement effect of T-type stiffeners is more significant.The experimental results were also compared with the FE model to verify the accuracy of the FE results.The ultimate strength of specimens was evaluated preliminarily by using the existing specifications,showing good agreement with the test results of the unstiffened specimens,while the ultimate strength of the stiffened steel tubes was underestimated.

关 键 词：钢管 加劲肋 大径厚比 压弯荷载 局部屈曲 风电钢塔筒 

分 类 号：TU391[建筑科学—结构工程]