PROPOSAL OF AN ANALYTICAL MODEL FOR A CLT WALL AND STEEL FRAME HYBRID STRUCTURE

Paper in proceeding, 2024

In Japan, the possibility of multi-storey timber buildings is not yet practiced at a large scale due to the complex structural design process. The Japanese structural design code for mid-to-high-rise buildings requires horizontal strength evaluation in which push-over analysis is widely applied. Because the CLT technology is rather new, the conventional model applied in the structural design practice is still not optimized and an easier-to-apply model is desired to further develop the timber construction industry. The objective of this paper is to propose an easy-to-apply analytical model of a novel CLT-Steel hybrid structure system. The model is based on the rotational spring approach to represent the rocking behaviour of the CLT wall under horizontal forces. The proposed model for the rotational spring was assumed to be a trilinear model with specific values for steel connection yield point and ultimate compression stresses for the CLT. The model was validated with a CLT shear wall experiment. The proposed model was validated by both the conventional model and the experiment.