Seismic Behavior of Zipper Braced Frames; A Review
Abstract
Inverted-V-braced frames are one type of ordinary concentrically braced frame. The behavior of this system is controlled by the buckling of the first story braces in compression, resulting in localization of failure and loss of lateral resistance. The unexpected failure of steel structures during past strong seismic excitation led to full fill adequate strength for modern structures in seismic areas. Concentrically Braced Frames (CBF) shows a concentration of damage within a single floor and tendency of strong mechanism formation. The undesired effect of the unbalanced force can be reduced by adding zipper struts which is labeled zipper frames. As a consequence, the results showed that zipper struts can improve the seismic performance of CBF system.
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