Simplified Modeling Method of Hybrid Structure of RC and Wood

In Japan, construction of wood structures for public buildings is encouraged for environmental reason. For example, low-rise large wood building sometimes involves core parts which are usually reinforced concrete structures. This kind of structures is described as "horizontal hybrid structure". However, it is difficult to evaluate seismic force distribution and stress between wood parts and RC parts. In this paper, basic vibration properties and simplified modeling method of horizontal hybrid structure were discussed. Based on the model, practical formulae of amplitude and distribution of seismic force acting on wood parts and equivalent length of floor diaphragm to evaluate moment at connection between wood part and RC part were also proposed. The accuracy was demonstrated by comparison with earthquake response analyses, and they gave close agreement with them.