zipper braced frames are an innovative bracing system for steel structures. conventional inverted-v-braced frames exhibit a design problem arising from the unbalanced vertical force generated by the lower story braces when one of them buckles. this adverse effect can be mitigated by adding zipper columns or vertical members connecting the intersection points of the braces above the first floor....

Steel braced frame systems (SBFs) having high stiffness and strength are commonly utilized due to their resistance lateral seismic forces in regions with seismicity. In this study, concentrically frames (CBFs) different bracing configurations used obtain the significance of pulse period associated near-fault (NF) ground motion by time-history dynamic analysis. Besides, far-fault (FF) motions al...

This paper examines the seismic behaviour of steel Multi-Tiered Concentrically Braced Frames (MT-CBFs) Conventional Construction category (Type CC) in moderate regions eastern Canada and proposes a new design method for such structures. A total 32 prototype MT-CBFs part single-storey building are selected designed accordance with 2019 Canadian standard (CSA S16-19) provisions Type CC structures...

Conventional concentrically-braced frame (CBF) systems have limited drift capacity before brace buckling and related damage leads to deterioration in strength and stiffness. Self-centering concentrically-braced frame (SC-CBF) systems have been developed to increase drift capacity prior to initiation of damage and minimize residual drift. SC-CBFs differ from conventional CBFs in that the SC-CBF ...

Steel frames equipped with chevron bracing (?-CBF) are usually less ductile than other steel systems. Therefore, in many cases, it can be convenient to design ?-CBF exploit their stiffness and resistance enforce a pseudo-elastic seismic response of the building low moderate zones. In current EC8, rules for same as those high frames, thus potentially leading massive, over-resistant uneconomic ne...

This paper reviews selected recent innovations that expand the range of applicability of a number of new and emerging structural steel systems that can provide effective seismic performance. Focus is on recent developments on: (a) Steel Plate Shear Walls having light gauge infill plates; (b) Perforated Steel Plate Shear Walls; (c) Buckling Restrained Braced frames designed to meet Structural Fu...