SEISMIC SIMULATION OF STRUCTURE IN EARTHQUAKES

摘要

In building performance investigation,laboratory testing are usually conducted,not only to see if they can resisted the static force imposed by gravity,but also to see how they behave in dynamic force such as in earthquake or wind loading. To precisely illustrate the performance of structural systems during earthquakes,adequate laboratory testing that simulates all aspects of real earthquake scenario is required. For decades,earthquake engineers have been using primarily three testing methods to investigate the dynamic behaviour of buildings,including earthquake simulation using shaking table,pseudodynamic tests and quasi-static cyclic studies of components. However,full/large scale models are costly to construct and correct preparations are necessary when using the first two testing approaches due to a number of scaling issues. The last method cannot incorporate the dynamic nature of earthquakes in testing. This work discusses a small shaking table test procedure that can be utilised for investigating overall dynamic behaviour of structures as well as their performance during earthquakes. The idea of model scaling incorporated with structural elastic and plastic responses will be presented. To validate the feasibility of this procedure,results from numerical analysis of structural responses were compared with that obtained from small scaled model experiments.