Design method and experimental study on damping wall consisted of concrete-filled steel tubular columns and steel coupling beams

Reinforced concrete shear walls used in multi-storey steel frame structures are prone to concentrated damage under seismic action, resulting in low material utilization and unsatisfactory ductility and energy dissipation effects. Therefore, a concrete-filled steel tubular column (CFSTC) -steel coupling beam (SCB) energy dissipated wall was proposed, and two types of wall structures, namely ‘strong column-weak beam’ and ‘weak column-strong beam’, were selected. The construction conditions and key performance parameters of the two types of walls were derived by theoretical calculation methods, and the seismic performance of the two types of walls was compared by combining experiments and finite element simulations. The verification of the design and performance parameter calculation theory was also carried out. The research results show that the ‘strong column-weak beam’ type wall achieves uniformly distributed energy dissipation, with peak value of equivalent viscous damping ratio greater than 0. 3, displacement ductility coefficient greater than 8, which shows significantly better seismic performance than the ‘weak column-strong beam’ type wall. In addition, the wall design principles and key performance parameter calculation methods proposed in the paper have good validity and accuracy. © 2024 Science Press. All rights reserved.