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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
Civil and Traffic Engineering     
Influence of semi-rigid connections on wind-induced responses of transmission towers
QIAN Cheng, SHEN Guo-hui, GUO Yong, XING Yue-long
1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China；
2. Electric Power Design Institute of Zhejiang Province, Hangzhou 310007, China
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Abstract  

A finite element modeling method of tower considering semi-rigid connection was developed to study the influence of semi-rigid property of steel connections on wind-induced responses of transmission towers. The influence of semi-rigid connections on vibration characteristics and wind-induced responses was calculated and analyzed. Quantitative indicators for semi-rigid connection were given and several typical types of connections were evaluated based on the indicators. Results show that the bending stiffness of connection has insignificant effect on the vibration modes and frequencies, the displacements and axial forces of transmission tower, but has significant effect on the bending moments and torsions. When the bending stiffness of connections increases to approaching the rigid connections, the bending stresses of main bars reach 10% to 25% of total stresses, which indicates that these parts of stresses have large influence on the strength and stability of bars. Quantitative indicators for semi-rigid connection were given. Some commonly-used connections with different bending stiffness were evaluated and results show that these connections all belong to semi-rigid connection. Therefore, it is highly recommended to consider the effect of semi-rigid connections in the finite element modeling process for transmission tower．

Published: 11 June 2017
CLC:  TU 312.1  
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QIAN Cheng, SHEN Guo-hui, GUO Yong, XING Yue-long. Influence of semi-rigid connections on wind-induced responses of transmission towers. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(6): 1082-1089.


节点半刚性对输电塔风致响应的影响

为研究钢构件节点的半刚性特性对输电塔风致响应的影响,提出考虑节点半刚性连接的输电塔有限元建模方法,计算分析半刚性对自振特性和风致响应的影响,给出半刚性节点的量化指标并对一些典型节点进行评价.结果表明：节点转动刚度对输电塔的振型频率、位移和轴力的影响较小,而对弯矩和扭矩的影响较大；当节点转动刚度增大至接近刚接时,主材的弯曲应力占总应力的10%～25%,说明该部分应力对杆件的强度和稳定有较大的影响；给出半刚性节点的量化指标,并对常见的具有不同转动刚度的节点进行评估,发现其均属半刚性连接范畴,因此在对输电塔进行有限元建模时应考虑节点半刚性连接的影响.

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