A Parametric Study on the Seismic Efficacy of Traditional Japanese Timber Pagodas

Abstract

The traditional timber pagodas of Japan have been around for hundreds of years, garnering them international recognition as cultural monuments by the UNESCO World Heritage Centre. While it is believed that these structures have never collapsed due to centuries of powerful earthquakes, the dynamic behavior of pagodas has yet to be understood fully. Current research has neglected the individual contribution of both the central column and bracket complexes on the overall response of the structure (both of which have been noted for their aseismic potential), so a parametric approach has been adopted in this study. Finite element analysis software has been utilized to examine the vibration control effect of the central pillar and the frictional dissipation of the brackets on the net deformations of a two-dimensional pagoda frame. The pillar and brackets were each found to contribute essential energy-dissipating mechanisms. Further understanding of these mechanisms will shed light on structural systems that seismic designers can utilize for both retrofitting and modern engineering projects, adapting components as necessary.