ABSTRACT
The correct operation and effectiveness of seismic isolation techniques for buildings can be checked using several different means of investigation. These include laboratory testing of isolators and models of the structure in question and on-site tests carried out directly on the buildings under consideration. Five large base isolated buildings of the National Telephone Company have been built in Ancona, Italy. In 1990 one of these buildings was subjected to both forced excitation and snap back tests.
Based on the full knowledge of the dynamic behaviour of the tested building, a seismic monitoring system was designed and is already in operation. The system permits the building behaviour to be checked under both wind and seismic excitations. Several types of transducers have been installed: triaxial accelerometers, displacement transducers, wind speed and direction instruments, temperature gauges. More than 60 acquisitions, caused by wind, have already been made.
Data processing is in progress to obtain information on the behaviour of isolated structures under small dynamic loads, in particular wind .
The paper describes the monitoring system and the behaviour of the building under wind excitation. The characteristics of the monitoring system are given together with some information concerning the behaviour of the building under wind excitation.
