Journal of Northeastern University:Natural Science ›› 2017, Vol. 38 ›› Issue (5): 746-750.DOI: 10.12068/j.issn.1005-3026.2017.05.028

• Resources & Civil Engineering • Previous Articles     Next Articles

Research on Static Stability of ±800kV Suspension Cable Guyed Tower

XIAO Zheng-zhi1,2, WEN Hang1, LI Zheng-liang1, 2   

  1. 1. School of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing 400045, China.
  • Received:2015-12-30 Revised:2015-12-30 Online:2017-05-15 Published:2017-05-11
  • Contact: XIAO Zheng-zhi
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Abstract:

To solve the problem of static stability of ±800 kV suspension cable guyed tower, equivalent elastic modulus formula of suspension cable is firstly derived based on the generalized variational principle. Then according to the strain energy, the equivalent column attributes of equivalent cross section are obtained. According to the force characteristics of suspension cable guyed tower column, it is simplified to the bar with uniform cross section which is hinged at the bottom and is supported elastically at the top. Finally, based on compressive bar stability theory, the relationship of calculation length coefficient of guyed tower column is got, the initial pretension and wind speed. The study results show that the static calculated length coefficient of column in windward side and column in leeward side along vertical transmission line direction is one, wind load and initial pretension have great impact on static calculated length coefficient of column in leeward side along transmission line, which rapidly increases with an increase in wind speed when initial pretension is lesser, but wind speed has a minor effect on it when initial pretension exceeds a certain value.

Key words: suspension cable guyed tower, static stability, calculated length coefficient, generalized variational principle, compressive bar stability theory.

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