The calculations included the ultimate and serviceability limit state designs, as well as the stability analysis of cross-sections, joints, and foundation of the tower, including the equipment installed on it. The facility is located in the municipality of Malaga, in an area close to the most dangerous seismic area in the Spanish southeast. The analysis was carried out according to the Eurocodes and the Spanish standard NCSE‑02 with a map updated by IGM, using the main program RFEM together with the add-on modules for towers, steel design, and dynamic analysis.
Structure Definition
The lattice tower has a height of 30 m (98.5 ft) and ground plan dimensions of 4.1 m × 4.1 m (13.5 ft × 13.5 ft). The equipment is placed using the supports corresponding to the tower sides. Furthermore, the tower has two platforms. One of them is located 26 m (85 ft) from the ground and the other is at a maximum elevation of 30 m (98.5 ft), where the new radome and radar equipment will be installed. A visual inspection was performed and geometric and photographic data were taken, as well as the extraction of samples necessary to make decisions on the material properties to be used in the analysis with sufficient safety according to the valid regulations. The tower platforms and equipment can be accessed from the interior of the tower using a stairway.
Results and Conclusion
It was certified for service based on the operational requirements of the maximum displacement and rotation of the structure at the radar positioning height. The strength capacity of the tower legs and faces against resistance, stability, and failure of the fasteners was certified favorably. It was proven that the existing foundation is sufficient to support the new equipment. By using the TOWER add-on module, which includes the additions of EC3 3‑1 and EC1 for these types of structures, it was possible to certify the structure more quickly and reliably.
| Location | Malaga Airport – Costa del Sol, Malaga, Spain |
| Customer | ENAIRE |
| Structural and Foundation Analysis | SAQQARA INGENIERIA S.L. Tel: (+34) 946 035 087 [email protected] www.saqqaraingenieria.es |
