Abstract：This paper presented the preliminary test results of a shake table test on a 1/5 scaled Chinese traditional seven-story pavilion-style wooden pagoda. The test considered three types of earthquake waves and a seismic intensity ranging from the frequently-met 7 degree to rarely-met 8 degree as specified in Chinese seismic design code. Modal analysis and system identification were carried out to identify the mode shapes, natural frequencies and modal damping ratios of the first four modes. It was found that the model structure remained structurally sound with no structural collapse or member failure, while minor perpendicular-to-grain tensile splitting was observed in certain cap blocks and distributed blocks of the Dougong connections (also known as complex brackets). The results also indicated that the first modal damping ratio of the principal directions of the model was more than 10%, while those of the other modes were found to be more than 5%. After the exposure to the earthquake excitations, the decrease of the natural frequency and the increase of the damping ratio corresponding to the first mode of the model structure were found to be 17% and 16%, respectively. The generated knowledge can be used as reference for design and retrofitting of traditional timber structures.
传统楼阁式木塔抗震性能研究[J]. 土木工程学报, 2016, 49(S2): 91-95.
Song Xiaobin Wu Yajie Luo Lie Gu Xianglin. Study on the seismic performance of a traditional pavilion-style pagoda. 土木工程学报, 2016, 49(S2): 91-95.
