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An Overview of Pros and Cons of Zipper Braced Frames

A. Mirza Gol Tabar Roshan1 and R. Nodeh Farahoni2 *

1 Civil Engineering Faculty, Babol Noshirvani University of Technology, Babol, Iran

2 Structural Engineering, Babol Noshirvani University of Technology, Babol, Iran

DOI: http://dx.doi.org/10.12944/CWE.10.Special-Issue1.15

The chevron bracing system provides the highest level of stiffness and average ductility by using the yield or buckling of braces. This system demonstrates weak post-buckling behavior while other structural members such as beams, columns and joints show elastic behavior. As a result of bracing buckling at a story, the unbalancing force acts perpendicular on the middle of the beam span and results in the concentration of damage on that story. Consequently, the affected story becomes prone to the soft story mechanism and the structure collapses eventually. In order to prevent this problem, it is possible to place vertical elements (zippers) between beams so that the head of bracings are connected at height and the resulting unbalancing force in the story is transferred to upper stories. Such a frame is known as the zipper frame. With a proper zipper configuration, it is possible to address the problems and weaknesses of the chevron bracing frame. Therefore, zipper frames can become proper substitutes for this type of bracing systems. By using the chevron element in the chevron bracing and turning it into a zipper frame, it is possible to increase the strength, ductility and energy absorption capacity of such frames.


Chevron; zipper frame; ductility; energy absorption; bracing

Copy the following to cite this article:

Roshan A. M. G. T, Farahoni R. N. An Overview of Pros and Cons of Zipper Braced Frames. Special Issue of Curr World Environ 2015;10(Special Issue May 2015). DOI:http://dx.doi.org/10.12944/CWE.10.Special-Issue1.15

Copy the following to cite this URL:

Roshan A. M. G. T, Farahoni R. N. An Overview of Pros and Cons of Zipper Braced Frames. Special Issue of Curr World Environ 2015;10(Special Issue May 2015). Available from: http://www.cwejournal.org/?p=10440

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