Investigation of Steel Shear Wall Behavior with Inclined slits

مهندسی عمران فردوسی

Article 5, Volume 34, Issue 4 - Serial Number 36, November 2021, Pages 55-68   

Document Type: Original Article

DOI: 10.22067/jfcei.2022.73953.1096

Authors

Ehsan Naeemi¹; hashem shariatmadar^{* 2}

¹Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.

²Civil, Engineering, Ferdowsi University of Mashhad

Abstract

One of the seismic load resistant systems is the slit steel shear wall system. Using inclined slits in the plate, the performance of the strips is flexural-axial and they act as a passive damper by forming plastic deformations. In this model, by changing the length of these axial members, the yield displacement and other seismic parameters of the shear wall can be changed. The purpose of this study is to numerically evaluate the slit steel shear wall with oblique slots and with different slit composition and end stiffener. For this purpose, after modeling validation, a parametric study was performed on the steel wall with different placement of different slits and end stiffeners. The reversed cyclic behavior was compared with a non-slot sample. Comparison of the results shows that despite the reduction of initial strength and stiffness in the slit model, this wall has a better cyclic behavior and dissipated energy. The results show less resistance drop and better performance in drifts above 2%. The results also show that only by changing the location of the slots, the final strength and initial stiffness will be changed up to 19 and 25%, respectively. Using end stiffeners with higher inertia moment is one of the most effective methods to increase energy dissipation; The use of Box100 cross section as a stiffener, increases the energy dissipation up to 2 times compared to the normal sample. Overall, the performance of the steel shear wall with the proposed groove shape is excellent.

Keywords

inclined slit steel shear wall; ultimate strength; reversed cyclic curve; energy dissipation

Supplementary Files

CE(34-4)-5-shariatmadar-Revised.pdf

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