Experiment-based numerical simulation of hybrid structure consisting of wooden frame and rigid core

摘要

In 2001, the Japanese government released a law to promote the use of wood in public infrastructure. As a response, a series of 1/3-scaled shaking table tests were conducted to investigate the seismic performance of wooden horizontal hybrid structure. Based on the tests, a discrete numerical model was built in OperiSees and the accuracy of the model was verified. A total of 8 ground motions were chosen as the input and scaled to have the same value of spectral acceleration with BCJ-L2 wave at the acceleration constant area. The peak ground acceleration of BCJ-L2 was set to 0.8 g to excite the elastic deformation of the wood part. Parameter analysis was then performed using the built model and the chosen ground motions. The aim of this research was to extend the result of the 1/3-scaled shake table tests to provide a quantitative evaluation on the influence of some concerned design features of the wooden horizontal hybrid structure. Results indicated that the increase of core wood stiffness ratio and the diaphragm-wall stiffness ratio would significantly mitigate the seismic deformation of the wood part at the cost of the increase of seismic force at the core part and the connection. Some specified values for the design features were suggested and a simple method to evaluate the shear distribution between the diaphragm and the shear wall was proposed.