Abstract
This paper analyzes the influences of important structural design parameters on the wind-induced response of cross-rope suspension tower-line. A finite element model of cross-rope suspension tower-line system is established, and the dynamic time-history analysis with harmonic wave superposition method is conducted. The two important structural design parameters such as initial guy pretension and sag-span ratio of suspension-rope are studied, as well as their influences on the three wind-induced vibration responses such as tensile force on guys, the reaction force on mast supports, and the along-wind displacement of the mast top; the results show that the value of sag-span ratio of suspension-rope should not be less than 1/9 and the value of guy pretension should be less than 30% of its design bearing capacity. On this occasion, the tension in guys and compression in masts would be maintained in smaller values, which can lead to a much more reasonable structure.
Highlights
The cross-rope suspension tower-line is similar in structure to the hybrid structure in suspended cable system to provide elastic support for the split conductors suspended through insulators by using the cross-rope between the ends of double-mast, and for setting up double-mast itself and maintaining the load balance of entire tower, it is necessary to lay out guys at the two sides of the double-mast, which, as a tension structure system, is of a complex nonlinear problem, of which key structural design parameters include the initial guy pretension and the sag-span ratio of suspension-rope, which will have a significant impact on the wind-induced vibration response of the structure
It is suggested that sag-span ratio of suspension-rope should be 1/8 or 1/9, so that the guy tensile force and the reaction force on mast supports will be kept at a small value
According to the above analysis, for the cross-rope suspension towerline, the initial guy pretension should be controlled within 15% and 30% of designed bearing capacity
Summary
The cross-rope suspension tower-line is similar in structure to the hybrid structure in suspended cable system to provide elastic support for the split conductors suspended through insulators by using the cross-rope between the ends of double-mast, and for setting up double-mast itself and maintaining the load balance of entire tower, it is necessary to lay out guys at the two sides of the double-mast, which, as a tension structure system, is of a complex nonlinear problem, of which key structural design parameters include the initial guy pretension and the sag-span ratio of suspension-rope, which will have a significant impact on the wind-induced vibration response of the structure.Issa and Avent proposed discrete-field analysis method and compiled related program for the analysis of guyed towers [1]. Ben Kahla proposed an approximate analysis method of the guyed tower by simplifying guyed tower mast to equivalent curved beam [2]. Madugula et al established the finite element program, simulating lattice mast with beam element, used to study the influence of the initial pretension of guys on structure dynamic response [4]. One is three-dimensional truss element modeling and the other is curved beam element. Kewaisy proposed hybrid mixed finite element model of guyed towers for consideration of nonlinear effects [6]. Meshmesha et al presented an equivalent curved beam finite element method to analyze the response characteristics of guyed towers under static and dynamic loads and made the comparison with classical finite element analysis method to verify the accuracy of the new method [9]. Gani and Legeron analyzed two types of guyed tower structures and pointed out that equivalent static
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
