A method and an arrangement for supporting a first beam between a first support structure and a second support structure in a building frame structure. The method includes securing the first beam to a first console against movement along the first console by means of a mechanical joint between the first console and the first beam, and the first console at a location between the beam supporting surface of the first console and the mechanical joint with a deforming section having increased deformability compared to the deformability of the first console at the beam supporting surface by reduced material dimensions in said deforming section of the first console compared to the material dimensions of the first console at the beam supporting surface.

Provided is a column-beam joint structure 1, wherein a plurality of thick-walled portions 3, notches 7, and narrow-width portions 9a on a central side of a flange plate 5 are formed integrally, cutting (dividing) is effected at a cut line 8, and the thick-walled portion 3 is welded and joined to a column 2a.

A one-piece structural fuse assembly is disclosed that is formed from a single piece of structural steel such as a beam. In embodiments, a first flange of the beam may form the fuse base, and a portion of the web of the beam may form the fuse plate. Additionally, a buckling restraint plate of the structural fuse assembly may be formed from a second flange of the beam, and the spacers of the structural fuse assembly may be formed from a portion of the web unused by the fuse plate. In examples, all of the components cut from the single piece of the beam are used in a single structural fuse assembly.

The strengthening system for beam-column connections in steel frame buildings to resist progressive collapse helps to mitigate progressive collapse in the event of accidental column loss by using a system of rippled steel plates reinforcing the beam-column connection. Various configurations of rippled steel plates are provided to connect in-plane and transverse beams at a joint. In the event of severe damage caused to a column of a steel framed building, the upper joints of the damaged column undergo downward movement. The rippled plates at the joint straighten during the initial downward movement, and resist further downward movement after complete straightening of the ripples. This helps in the development of catenary action in steel beams. The proposed system is simple, fast to construct, demountable, and easy to repair/replace after damage caused by blast loads.

A moment frame is disclosed for a sloped roof construction. The moment frame includes a lateral bracing system having a high initial stiffness and including yield links capable of effectively dissipating energy generated within the lateral bracing system under lateral loads.

A full-moment column collar is disclosed, including four collar flange components and four collar corner components. Each collar flange component includes an upper transverse element and a lower transverse element, connected by a bridging member. Each collar corner component includes first and second expanses defining a corner and a standoff portion extending from the corner, the standoff portion having a distal T-shaped structure. Each collar corner component is configured to connect two adjacent collar flange components, and each collar corner component has a multi-axis alignment structure extending from a bottom end portion for vertically positioning a lower transverse element of a respective collar flange component.

A structure for seismic isolation 10 provided on a structure plane 17 including a pair of left and right columns 5, 5 spaced apart in a horizontal direction, and a pair of upper and lower beams 7A, 7B spaced apart in a vertical direction, wherein the structure for seismic isolation comprises: a seismic isolation device 11 provided in a middle of each of the column 5, 5 to be displaced toward the beam 7A; and a horizontal rigid bearing element that is provided between an area in which the seismic isolation device 11 is provided and the beam 7B and that includes a connection beam 13 connecting the pair of columns 5, 5 and vertical braces 15L, 15R.

The present invention relates to a shear link including replaceable cover plates. The shear link includes first and second combination plates combined with a structure, a main frame that includes both ends fixed to the first and second combination plates respectively and a hollow formed in a center to pass therethrough forward and backward, first and second cover plates positioned to come into contact with left and right sides of the main frame respectively to cover the hollow and including a plurality of through holes passing therethrough forward and backward, and a combination unit that separably combines the main frame with the first and second cover plates. In the shear link including replaceable cover plates according to the present invention, since the first and second cover plates are separably combined with the main frame by the combination unit, the first and second cover plates deformed by an external force may be easily separated from the main frame to reduce time and costs consumed for a replacement operation.

A full-moment column collar is disclosed, including four collar flange components and four collar corner components. Each collar flange component includes an upper transverse element and a lower transverse element, connected by a bridging member. Each collar corner component includes first and second expanses defining a corner and a standoff portion extending from the corner, the standoff portion having a distal T-shaped structure. Each collar corner component is configured to connect two adjacent collar flange components, and each collar corner component has a multi-axis alignment structure extending from a bottom end portion for vertically positioning a lower transverse element of a respective collar flange component.

Embodiments disclosed herein relate to a beam-to-column connection systems for a moment-resisting frame as well as moment-resisting frames that include such connection systems.