抄録
Current seismic evaluation method widely used based on the dynamic analysis considers the elastic and plastic deformation of materials, excluding the fracture of them. On the other hand, much larger earthquakes are considered for the seismic design of steel-frame structures through the 2011 Tohoku Earthquake or the 2016 Kumamoto Earthquake. Under these severe ground motions, the fracture of structural members could be occurred. If member fracture occurs during earthquakes, there are considered to be many effects on the vibration property and the seismic performance of the structure. Therefore, the fracture of members is preferably taken into account in the seismic performance evaluation for these large earthquakes. In this paper, the dynamic seismic analysis method considering member fracture developed by the author and the ordinary method not considering member fracture are applied to the steel-frame structure model. By comparing each result, the effects of considering member fracture are discussed.
