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Cyclic testing of steel frames infilled with concrete sandwich panels

Hashemi S. J., Razzaghi J., Moghadam A. S., Lourenço P. B.

Archives of Civil and Mechanical Engineering

2018

Vol. 18, no. 2

557--572

In-plane seismic behaviour of concrete sandwich panel-infilled steel frame (CSP-ISF) was experimentally and numerically investigated. Four large-scale, single bay and single story steel frame specimens were tested under reversed cyclic lateral loading. Three infilled frames with different aspect ratios along with one bare frame were considered. It was found that addition of sandwich panels leads to considerable increase in the lateral stiffness and strength, ductility, energy dissipation capacity as well as equivalent viscous damping ratio of the steel frames. Furthermore, the maximum shear capacity of CSP-ISF specimens was validated by analytical approaches which showed good agreement with experimental results. Based on the present experiments, structural performance levels required for Performance-based Analysis are also proposed for concrete sandwich panel used as infill walls. Finally, a numerical model is presented to analyze the nonlinear behaviour of CSP-ISFs.

Experimental seismic performance of steel- and composite steel-panel wall strengthened steel frames

Jiang L., Zheng H., Hu Y.

Archives of Civil and Mechanical Engineering

2017

Vol. 17, no. 3

520--534

This paper presents an experimental study to investigate the seismic performance of steel- and composite steel-panel wall strengthened steel frames (SPWF and CPWF). A detailed experimental investigation of five 1/3-scaled specimens with one-bay and single-story was conducted. The failure modes, load-carrying capacity, hysteretic behavior, ductility, energy dissipation capacity were presented and analyzed. The effects of the length-to-height ratio, stiffeners, and the type of walls on the seismic behavior were also investigated. The experimental results show that the specimens tolerate 4% to approximately 5% story drift, the steel- and composite steel-panel wall improved the seismic performance of the steel frame. The length-to-height ratio has had large effect on load-carrying capacity, initial stiffness, ductility and response modification factor. In addition, finite element (FE) models of SPWFs and CPWFs were established to simulate their nonlinear behavior, and the results were verified by the experimental results. The failure mode obtained from the numerical simulation was in accordance with the experimental phenomenon. Furthermore, formulas were developed to estimate initial lateral stiffness and shear strength of the test specimens, and such theoretical predictions were verified by the experimental results.