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Memoirs of the Osaka Institute
of Technology, Series A Vol. 43, No.2 (1998) pp. 1 1~26
A Study on Basic Forms of the Asian Stopa and
Dynamic Properties of Multi-story Wooden Pagodas
by
Shintaro OHBA, Kwang kyou PARK'and Charles ROKOSZAK" Department of Architecture, Faculty of Engineering
(Manuscript received October 5, 1998)
Abstract
This paper describes the evolution of basic forms of the traditional Stupa - Pagodas in Asia and focuses on the dynamic properties of multi-story wooden Pagodas in Korea and Japan . The primary concerns of the investigation were the field surveys conducted on site in these two countries. Basic dynamic characteristics of multi-story pagodas were explored through microtremor measurements and man-excited vibration tests.
The results of the field survey are summarized as follows:
1)
The natural period T(sec) of multi-story wooden pagodas is related to height H(m) by the following equation: T=0.035H2) The natural period depends on structural types, the natural period of wooden pagodas is about three times longer than that of the steel reinforced concrete structure.
3) In the case of the same plan and section such as the pagodas at Yakushi-ji Temple, the natural period of the older pagoda built in 730A.D. is 1.2 times as long as that of the newer one built in 1981.
4) The damping factor of a multi-story wooden pagoda 20~40 meters high ranges from 1.5 to
3.5%.
* Taejon University, Korea
** Kansai University of Foreign Languages, Otani Junior College 11
