Author: Davey, James;Augarde, Charles
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Davey, James;Augarde, Charles
The Structural Engineer, Volume 79, Issue 7, 2001
This article discusses and investigates how a slender steel staircase responds to dynamic excitation. A blind analysis predicted the mode shape and main natural frequency of the staircase. From experimental investigation, this prediction was proved to be close to the actual behaviour. Initial and post footfall analysis accurately modelled the response of the staircase. Based on these findings, this work has resulted in a proposed procedure to determine the maximum response of future staircases, which is contained in the full report held by the University of Bristol. Tim Hill and Matthew Palmer
With the rapid increase in urban development and in population, habitable areas that are not already densely populated are on the decline. For example, whereas in 1950, there were only 7 urban areas in the world with more than 5m inhabitants, this number rose to 34 in 1980 and is expected to rise further to 60 by the year 2000 (Mehta and Motiero, 1993). This, coupled with the increasing importance of corporate insurance and risk management, has led to heightened awareness of the importance of earthquake risk assessment and management of the disastrous effects of this natural hazard. Amr Elnashi