Experimental-numerical study on weakened HSS-to-HSS connections using HBS and RBS approaches

On the Performance of Steel Buildings with Skewed Beams against Progressive Collapse

“…Therefore, it is concluded that the buildings with skewed connections are more sensitive to progressive collapse, especially when the corner columns are removed. Considering the importance of the investigation of buildings' performance against progressive collapse, it is suggested that this issue should be studied in future research for the novel beam-column connections [9,10]. Figure 7 shows the vertical displacement time-history of the joint above the removed column for the two-story building models with skewed beam-column connections with angles of 30 and 60 degrees under the simultaneous effect of two horizontal components of the earthquake record number 181.…”

“…Therefore, it is concluded that the buildings with skewed connections are more sensitive to progressive collapse, especially when the corner columns are removed. Considering the importance of the investigation of buildings' performance against progressive collapse, it is suggested that this issue should be studied in future research for the novel beam-column connections [9,10]. As shown in Figure 8, it can be seen that in the model with a 30-degree connection in column removal scenario number 4, the value of the interstory drift ratio in X direction is lower than the limit imposed by the Standard 2800 [8], which is equal to 0.025.…”

“…Therefore, it is concluded that the buildings with skewed connections are more sensitive to progressive collapse, especially when the corner columns are removed. Considering the importance of the investigation of buildings' performance against progressive collapse, it is suggested that this issue should be studied in future research for the novel beam-column connections [9,10].…”