Evaluation of Structural Damages Reduction of Midrise Steel Moment Frame adding Cross-Laminated Timber Infill Wall by Incremental Dynamic Analysis (IDA)

Considering that in recent decades, the discussion of earthquake engineering for better understanding of earthquakes and their destructive effects on structures built in seismic areas has made significant progress, which has led to changes in building design regulations against earthquakes. In some cases, structures designed based on initial revisions of seismic codes and standards have lower seismic resistance than structures designed with newer revisions. As a result, constructed structures need to be retrofitted. In this paper, the reduction of seismic damage of six-stories steel moment frames having CLT infill walls has been investigated. The system is modeled with ABAQUS software. The S4R element has been used to model steel beams and columns with a yield strength of 350 MPa. Cross-sectional vertical panels with C3D8 R element according to NDS 2018 are modeled elastically in the software. Contact modeling was performed between the vertical panel with the steel frame by assigning the behavior of the Hard Contact type in the direction perpendicular to the plates in contact with each other and the Tangential type in the direction of the tangent of the two plates with friction coefficient. Also, the gap between the steel frame and the CLT is crossed to deform the brackets during an earthquake to dissipate the earthquake energy during the vibration. Frame behavior has been investigated using incremental dynamic analysis. The results showed that CLT infill walls play a major role in reducing maximum inter-story drift and various structural damages. The results also showed that the addition of CLT infill walls reduces the possibility of the collapse of the structure at various damages.