EXPRIMENTAL AND ANALYTICAL STUDY ON SEISMIC BEHAVIOR OF TRADITIONAL WOODEN FRAMES CONSIDERING HORIZONTAL DIAPHRAGM DEFORMATION AND COLUMN SLIPPAGE

摘要

In this paper, seismic behaviors of Japanese traditional wooden buildings are investigated by full-scale vibration tests and numerical analysis. Full-scale vibration tests of wooden frames were conducted with a huge shaking table, E-defense, in NIED. The tests focused on the deformation of horizontal diaphragms such as floor or roof frame, and the slipping behavior of columns which are directly placed on flat stone foundations. The influences of above behaviors on the seismic performance of a whole building were examined by changing the arrangement of bearing walls. From the experimental results, it is found that, in the case of the rigid diaphragm, the torsional motion is significant in the asymmetric wall-arrangement, and, in the case of the flexible diaphragm, the seismic response is more complicated depending on the wall-arrangement. It is also found that column slippage can reduce the deformation response and damage of the whole building. A seismic response analysis of the wooden frames was conducted by considering the effects of flexible horizontal diaphragm, and the numerical results agree satisfactorily with the experimental results. Further examinations are required to simulate the column slippage.