Developing Procedures for the Prediction of floor Response Spectra
The seismic engineering industry has been shifting its focus towards performance based engineering and as it does, the importance of adequately predicting the performance of the often-overlooked nonstructural elements has become clear. A lack of simple but reliable methods for predicting the acceleration demands on nonstructural elements is considered a significant challenge for the industry. Recent studies have highlighted the shortcomings that current international design codes have in accurately assessing floor acceleration response spectra. This research, therefore, attempts to find the optimum balance: proposing a procedure for the prediction of floor response spectra which is reliable and sufficiently accurate whilst maintaining a level of simplicity suitable for widespread adoption. Several methods are examined, with the importance of critical parameters quantified. Different means of simplifying the methods is then explored. The verification of each method is undertaken using four instrumented case-study buildings which have accelerometer records from real or simulated seismic events. The acceleration floor spectra spectra obtained from these records are compared with those predicted by the methods. The desired outcome of this research is a fully implementable and reliable procedure that can reduce the losses from damage to nonstructural elements.
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