Direct Analysis of an Ultrahigh-Voltage Lattice Transmission Tower Considering Joint Effects
Publication: Journal of Structural Engineering
Volume 143, Issue 5
Abstract
Transmission towers play an important role in transmitting electricity in a power grid safely and reliably. In traditional design practice, the second-order (frame side sway) and (member curvature) effects and joint effects such as load eccentricities, slippage effects, and semirigid connection are commonly ignored in analysis. Great discrepancy is frequently noted between full-scale tower tests and numerical simulations using first-order linear analysis. In this paper, second-order direct analysis is used and slippage of bolted joints as well as semirigid connection behavior are taken into account. Member initial bowing and frame out-of-plumbness imperfections are considered in the present study, which is verified by full-scale test on an ultrahigh-voltage (UHV) lattice transmission tower. The technique of semirigid design and simulation of joint stiffness for load eccentricity by simple modeling for transmission towers meeting the requirements for direct analysis with verification by a full-scale test is unavailable in literature and proposed in this paper. Furthermore, the influences of joint slippage on the deflection and load behavior of the studied towers are quantified and reported.
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Acknowledgments
The authors acknowledge the financial support provided by the Natural Science Foundation of China (51408221), Natural Science Foundation of Hebei Province of China (E2015502016), Fundamental Research Funds for the Central Universities of China (2014ZD36), and the science and technology projects of Eastern Inner Mongolia Electric Power Co., Ltd (the cryogenic mechanical property of tower member in Eastern Inner Mongolia area). They are grateful for financial support from the Research Grant Council of the Hong Kong SAR Government on the projects “Second-Order Analysis of Flexible Steel Cable Nets Supporting Debris (PolyU 152008/15E),” “Second-Order and Advanced Analysis of Arches and Curved Structures (PolyU 152012/14E),” and the Hong Kong Branch of Chinese National Engineering Research Centre for Steel Construction supported by The Innovation and Technology Fund of the Hong Kong SAR Government for the project “Advanced Numerical Analyses for Building Structures Using High Performance Steel Materials.”
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Published In
Journal of Structural Engineering
Volume 143 • Issue 5 • May 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 10, 2016
Accepted: Oct 27, 2016
Published online: Jan 27, 2017
Published in print: May 1, 2017
Discussion open until: Jun 27, 2017
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