Numerical Study on Seismic Behavior of Moment-Resistant Steel Frames with Hybrid Masonry Infill

Abstract

Hybrid masonry system is a new structural system, in which the masonry panels link to the frame with steel plate connections. Hybrid masonry uses masonry infill for lateral stiffness and strength within frames in addition to supporting out-of-plane (flexural) loads. There are many primary reasons for the development of hybrid masonry systems. Most important ones are to simplify the construction of framed buildings with masonry infill and to provide structural redundancy, which can be utilized for limiting progressive collapse.There are three hybrid wall types including, ordinary hybrid shear wall, intermediate hybrid shear wall and special hybrid shear wall. Hybrid masonry systems can be applied to either concrete or steel-framed structures. This research focuses on steel frames. In this paper, seismic behavior of ordinary, intermediate and special hybrid shear walls are investigated using nonlinear static analysis. To this end, 15 steel frames including, bare frames, infill frames, ordinary hybrid shear wall, intermediate hybrid shear wall and special hybrid shear wall are modeled using ABAQUS software. The stress contours and capacity curves of models are estimated using nonlinear static analysis. Results indicate that failure capacity, and ductility of special hybrid shear walls are more than ordinary and intermediate ones. Moreover, the increase in moment of inertia of frame sections, increases the stiffness and energy dissipation capacity for all three hybrid shear walls

Keywords

• moment-resistant steel frame
• masonry system
• hybrid infill
• finite element model
• nonlinear static analysis