Evaluation Of Dynamic Properties Of Traditional
Wooden Shrines In Yurihonjo, Japan
Author(s)
C. Cuadra, Y. Yamada & R. Narumi
Abstract
Japanese traditional wooden shrines located in Yurihonjo city are investigated to
evaluate their dynamic characteristics and seismic performance. Some of the
selected constructions for this research are declared as buildings of cultural
interest by the local government and therefore efforts are made to preserve these
kinds of buildings. The structure corresponds in general to framed wooden
constructions with traditional connections between columns and beams. In
general, nails are not used in these joints, and instead, the beams are narrowed at
the extreme to be inserted into a hole cut in the columns. These buildings are
supported by columns that rest directly on stone bases forming a kind of pinned
joints. Ambient vibration measurements of the buildings were planned and
undertaken by the authors. A comparative study of the predominant periods of
the structures is done by plotting the periods versus building heights. Preliminary
results show that wooden temples in this region have long periods in comparison
to temples of other regions of Japan. The damping ratio was estimated from a
free vibration portion of the response curve after the impulse force given by a
person. The damping ratios are compared by considering the influence of the
number of bays and the dimension of the frame structure in each direction.
Ambient vibration measurements provided a valuable basis for evaluation of the
dynamic characteristics of wooden heritage structures.
Keywords: wooden frame, ambient vibration, period, damping ratio.
Keywords
Keywords: wooden frame, ambient vibration, period, damping ratio.
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