Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 69, Number 5, March10 2019 , pages 567-577 DOI: https://doi.org/10.12989/sem.2019.69.5.567 |
|
|
|
Static and dynamic analysis of guyed steel lattice towers |
||
Hussam M. Meshmesha, John B. Kennedy, Khaled Sennah and Saber Moradi
|
||
| Abstract | ||
| Guyed steel lattice towers (or guyed masts) are widely used for supporting antennas for telecommunications and broadcasting. This paper presents a numerical study on the static and dynamic response of guyed towers. Three-dimensional nonlinear finite-element models are used to simulate the response. Through performing static pushover analyses and free-vibration (modal) analyses, the effect of different bracing configurations is investigated. In addition, seismic analyses are performed on towers of different heights to study the influence of earthquake excitation time-lag (or the earthquake travel distance between tower anchors) and antenna weight on the seismic response of guyed towers. The results show that the inclusion of time lag in the seismic analysis of guyed towers can influence shear and moment distribution along the height of the mast. Moreover, it is found that the lateral response is insensitive to bracing configurations. The results also show that, depending on the mast height, an increased antenna weight can reduce the tower maximum base shear while other response quantities, such as cables tension force are found to be insensitive to variation in the antenna weight. | ||
| Key Words | ||
| bracing configurations; dynamic analysis; guyed lattice towers; seismic analysis; ultimate load; finite-element | ||
| Address | ||
| Hussam M. Meshmesha: Formerly: Bantrel Co., Calgary, Alberta, Canada John B. Kennedy: Department of Civil & Environmental Engineering, University of Windsor, Windsor, Canada Khaled Sennah and Saber Moradi: Department of Civil Engineering, Ryerson University, Toronto, Ontario, Canada | ||