Long-time observation of wind and temperature effects on TV towers

This paper is concerned with the application of available data to the deter mination of service life of antennae towers and masts, the important part o f which is the GRP cylindrical extension. In some cases, they have already been in service for nearly 30 years, so the question of their remaining lif etime is important. Long-term observations were made on one of these extens ions in 1993-94, the measured data being registered and classified accordin g to their magnitude, using the rain-flow method. The application of the Pa lmgren-Miner criterion has given the possibility of estimating the remainin g service life of the structure. (C) 1999 Elsevier Science Ltd. All rights reserved.