Mechanical behavior of a 9-story timber building with clt rocking wall-columns in structural core base on seismic response analysis

In recent years, the use of wood in buildings has become widespread worldwide because of social factors such as the realization of carbon neutrality and the sustainable development of forestry. Given the widespread adoption of cross-laminated timber (CLT), CLT rocking wall columns have attracted increasing attention. CLT rocking wall columns are characterized by low slippage and high origin-oriented performance owing to vertical prestress introduced by prestressed concrete steel bars. The deformation of each story can be ensured to remain uniform by using the rocking wall columns as through-wall columns in mid- to high-rise wooden buildings. The performance of buildings can be maintained by introducing CLT rocking wall columns in mid- to high-rise wooden buildings, which have a large slip property; however, few such cases exist. In this study, the mechanical behavior of a nine-floor wooden building with CLT rocking wall columns as part of its undamped frame was investigated through a seismic response analysis using a frame model, and the differences in behavior with and without CLT rocking wall columns were confirmed. To obtain all the necessary parameters to model building structures under horizontal loads, we performed tests on frames as well as on CLT rocking wall columns with different parameters, and finally with beam-to-column joints.