Dynamic Behavior Of The Moyano Model Self-Supporting Tower Under Seismic Actions

Abstract

In Cuba, communications towers are strongly affected by extreme winds due to the passage of hurricanes, which has caused the failures of these structures. The hydrometeorological risk is not the only one that is present in the country, there are also areas with different degrees of seismicity, highlighting the eastern region considered the one with the greatest seismic danger. The provinces of Granma, Santiago de Cuba and Guantánamo are located in this area, so studying the behavior of these structures under seismic actions is of vital importance. This research aims to review the dynamic behavior, check compliance with the service requirements established by the ANSI/TIA-222-H standard of 2018 and perform the structural check of the Moyano model self-supporting towers located in the province of Granma according to the resistance requirements established in the American standard ANSI/AISC341-16. The structural analysis of the Moyano self-supporting tower was carried out, running the mathematical model with the SAP2000 V22 Software. The dynamic characteristics were obtained by modal analysis. The self-weight, the antennas and ladder were taken into account, as well as the seismic forces, which were considered from the establishment of a design response spectrum. The analysis showed that the Moyano model self-supporting towers located in seismicity zone 2 according to NC 46 of 2017 in the province of Granma comply with the service requirements established by the American standard ANSI/TIA-222-H of 2018 but do not meet the resistance requirements established by the American standard ANSI/AISC341-16.